Home

7400 Plus - User Manual

Contents

1. Acronym Definition Acronym Definition AC Alternating Current mA Milliamps AID Analog to Digital mm Millimeters ASCII A MOV Metal Oxide Varistor nformation Interchange C Common or the pole N A Not Applicable C Degrees Celsius NEC National Electrical Code CH Methane NEMA National Bo CO Carbon Monoxide NC Normally Closed Relay Contact CSA Canadian Standards Association NO Normally Open Relay Contact D A Digital to Analog PC Personal Computer dB Decibels PCB Printed Circuit Board DC Direct Current PLC Programmable Logic Controller DCS Digital Control System ppm Parts per Million F Degrees Fahrenheit R Resistance GND Ground RFI Radio Frequency Interference HS Hydrogen Sulfide R H Relative Humidity Hz Hertz RTU Remote Telemetry Unit Current SELV Safety Extra Low Voltage IEEE Institute of Electronic amp Electrical TCP IP Transmission Control Protocol Internet Engineers Protocol LCD Liquid Crystal Display VAC Volts Alternating Current LEL Lower Explosive Limit VDC Volts Direct Current Vpk Peak Voltage 5 of 54 087 0041 RevB SAFETY 7400 Plus Instruction Manual This Page Left Intentionally Blank 6 of 54 087 0041 Rev B 7400 Plus Instruction Manual 2 Introduction The Scott Health 8 Safety 7400 Plus Four Channel Controller is designed to display and control alarm event switching for up to four inputs Inputs are typically a 4 20mA signal from a transmitter or s
2. 2 Wire Transmitter Typical Figure 2 8 2 Wire Transmitter Typical to Bridge Sensor Input PCB 16 of 54 087 0041 Rev B 7400 Plus Instruction Manual Note JP5 Ch3 or JP6 Ch4 must be set to the correct position of the input TR1 Ch3 or TR2 Ch4 must havea 100 ohm resistor installed 2 a AC Power SIGNAL 24V NEGATIVE Source In POSITIVE 3 Wire Transmitter Typical Figure 2 9 3 Wire Transmitter Typical to Bridge Sensor Input PCB 17 of 54 087 0041 Rev B SAFETY 7400 Plus Instruction Manual 2 1 4 4 20 mA Analog Output Option The 10 bit 4 20mA analog output board P N 093 0467 option may be installed at P2 on the Motherboard Refer to Figure 2 10 tena geen Assy 093 0467 Optional 4 20mA Output Notes az E e kr k pre CHI CH2 CH3 CH4 O 4 20mA OUTPUTS o 4 20mA Outputs are sourcing and 24 VDC power must not be supplied by the receiver device Loop drive capability is 750 ohms with nominal 85 240 VAC power or 24 VDC power as the Controller primary power supply Figure 2 10 4 20mA Analog Output PCBA Each channel output will transmit 4mA for 0 readings and 20mA for 100 readings If the 7400 Plus primary power is 100 240 VAC or at least 24 VDC 4 20mA outputs are capable of driving 20mA through a 750 ohm load Outputs are self powered and DC power should not be provided by the receiving device Precision calibration of the 4 20
3. STATUS LED S O KEYPAD CAL IN PROGRESS O FAULT ALARM Magnetic y Next Edit dl Keypad Cal we Keypad buttons behind door Classified to CSA C22 2 NO 152 for combustibles detection Class DIV 2 Groups A B C D Power 100 240 V 50 60 Hz 45A WWW SCOTTHEALTHSAFETY COM e or 10 30 VDC 3 WATTS S N 90 Cc US 219995 READ amp UNDERSTAND MANUAL Figure 2 1 External Display 8 of 54 7400 Plus Instruction Manual 2 1 1 Motherboard The 7400 Plus Motherboard is the interface between the Display CPU assembly and all other system I O devices Six terminals located at the bottom of the motherboard provide connections for input power output power and connection to optional devices A Universal Switching Power Supply located at the top middle of the motherboard regulates AC input power for distribution to DC components Refer to Figure 2 2 9 of 54 087 0041 RevB Universal Switching Power Supply i Display i Assembly Input Options 4 20mA Output Option 093 0465 Analog Input 093 0467 Discrete Relay 093 0466 Bridge Sensor Input Le d TB1 e TB2 Il J2 vi TB3 10 30 Vdc power Dry contact input for 1 24 Vdc terminal for 24 Vdc power input for primary 1 90 ional remote I optional 100db Output for remote power or as back Alarm Reset Switch piezo annunciator devices such as I I I Itransmitters lights Irelays etc 35 mA I I lup to AC prima IShield wires or i I
4. EXPLOSION HAZARD SUBSTITUTION OF COMPONENTS MAY IMPAIR SUITIBILITY FOR CLASS 1 DIVISION 2 EXPLOSION HAZARD Do NOT REPLACE FUSE UNLESS POWER HAS BEEN SWITCHED OFF OR THE AREA IS KNOWN TO BE HAZARD FREE EXPLOSION HAZARD Do NOT DISSCONNECT EQUIPMENT UNLESS POWER HAS BEEN SWITCHED OFF OR THE AREA IS KNOWN TO BE HAZARD FREE USE A PROPERLY RATED CERTIFIED AC POWER MAINS CABLE INSTALLED AS PER LOCAL OR NATIONAL CODES FOR DC POWERED UNITS DC POWER MUST BE FROM A SELV RATED SOURCE A CERTIFIED AC POWER MAINS DISCONNECT OR CIRCUIT BREAKER SHOULD BE MOUNTED NEAR THE CONTROLLER AND INSTALLED FOLLOWING APPLICABLE LOCAL AND NATIONAL CODES IF A SWITCH IS USED INSTEAD OF A CIRCUIT BREAKER A PROPERLY RATED CERTIFIED FUSE OR CURRENT LIMITER IS REQUIRED TO BE INSTALLED AS PER LOCAL OR NATIONAL CODES MARKINGS FOR POSITIONS OF THE SWITCH OR BREAKER SHOULD STATE I FOR ON AND O FOR OFF 2 of 54 087 0041 Rev B 7400 Plus Instruction Manual CAUTIONS CLEAN USING ONLY A DAMP CLOTH WITH NO SOLVENTS DO NOT USE HAND CLEANERS LOTIONS SOAPS OR ANY CLEANING PRODUCTS CONTAINING SILICONE PRIOR TO OR WHILE HANDLING CATALYTIC BEAD SENSORS FAILURE TO DO SO MAY POISON SENSORS 1 4 General Rules of Use POWER MUST BE ON TO WORK The 7400 Plus Controller will only operate while powered on SHOCK HAZARD Disconnect or turn off power before servicing this instrument NEMA 4X wall mount models should be fitted with a locking mechan
5. MODBUS Register and Function Code Summary Variable Code Alias Read Function Code Write Function Read Write Coils Alarm Ack Reset 2001 1 5 NOTE AFTER WRITING A TRUE TO THIS REGISTER THE 7400 PLUS AUTOMATICALLY RETURNS IT TO FALSE Read Only Discretes Chan 1 Fault 12001 2 N A Chan 1 Alarm 1 12002 2 N A Chan 1 Alarm 2 12003 2 N A Chan 1 Alarm 3 12004 2 N A Chan 2 Fault 12005 2 N A Chan 2 Alarm 1 12006 2 N A Chan 2 Alarm 2 12007 2 N A Chan 2 Alarm 3 12008 2 N A Chan 3 Fault 12009 2 N A Chan 3 Alarm 1 12010 2 N A Chan 3 Alarm 2 12011 2 N A Chan 3 Alarm 3 12012 2 N A Chan 4 Fault 12013 2 N A Chan 4 Alarm 1 12014 2 N A Chan 4 Alarm 2 12015 2 N A Chan 4 Alarm 3 12016 2 N A 52 of 54 087 0041 RevB 7400 Plus SAFETY Instruction Manual Table A 1 MODBUS Register and Function Code Summar Variable Code Alias Read Function Code Write Function Standard Relay 1 12017 2 N A Standard Relay 2 12018 2 N A Optional Relay 1 12019 2 N A Optional Relay 2 12020 2 N A Optional Relay 3 12021 2 N A Optional Relay 4 12022 2 N A Optional Relay 5 12023 2 N A Optional Relay 6 12024 2 N A Input Fault Relay 12025 2 N A Read Only Registers Product ID 30001 4 N A Returns the numeric value 1000 for product ID Firmware Value 30002 4 N A Return a numeric value for fir
6. Without a cursor present the NEXT key returns to the previous menu one menu at a time and will eventually return the LCD to the data display ALARM RESET notifies the 7400 Plus that the user acknowledges an alarm and when pressed will deactivate any optional audible alarms Flashing indicators will change from flashing to a steady state 21 of 54 087 0041 Rev B SAFETY 7400 Plus Instruction Manual 2 3 Specifications Supply Voltage 10 30VDC Alternate 3 Watts or 100 240VAC Primary 50 60Hz 0 45 amp max 20 Watts max steady state NOTE LOADS REQUIRING GREATER THAN 24VDC REQUIRE AN EXTERNAL AC DC SUPPLY NEC CLASS 2 50 WATT EXTERNAL POWER SUPPLIES ARE AVAILABLE FOR DIV 1 AND 2 P N 093 0469 AND P N 093 0468 THESE SUPPLIES ARE APPROVED FOR USE IN POTENTIALLY HAZARDOUS INSTALLATIONS AND INCLUDE A NEMA 4X WEATHER RATING CONTACT SCOTT H amp S FOR MORE INFORMATION Power Consumption Minimum 1 5 Watts 10 30VDC Maximum 12 Watts 24VDC Temperature Range 25 to 50 C 13 to 122 F Humidity Range 0 to 90 R H Non Condensing Altitude Up to 2000 Meters 6562 feet Housing Installation Categories NEMA 4X DIV 2 Groups A B C D Cat Il and pollution degree 3 NEMA 4x IP66 NEMA 7 DIV 1 Groups B C D with o ring in door to satisfy NEMA 4 Relays Common Form C dry contacts Standard 5 Amp for 28VDC and 250VAC Resistive Loads CAUTION APPROPRIATE DIODE DC LOADS OR MOV AC LOADS SNUBBER DEVICES M
7. 6V Gold Bell Sensor Heads may be separated using a three conductor cable with various wire gauges NOTE THE 5 5V SCOTT HEAD DRAWS FAR LESS CURRENT ALLOWING FOR MUCH GREATER LENGTHS OF WIRE FOR EXAMPLE USING 18 AWG THE MAXIMUM DISTANCE IS 1600 FEET 488M The added detector head wiring must meet prevailing electrical codes for hazardous area installations that specify conduit sealing explosion proof fittings and special wiring methods NOTE THE DETECTOR HEAD S SAFETY GROUND WIRE MUST THE SAME SIZE AS THE OTHER TRANSMITTER WIRES Table 3 1 Maximum Distance Between 6V Sensor Head and 7200 Plus 6V Sensor Head Gold Bell we Renee E 12 0 0023 106 32m 14 0 0031 80 24m 16 0 0059 42 13m 18 0 0080 31 9m When installing conduit and wiring from the Sensor Head to the 7400 Plus adhere to the following e lf the Sensor Head is mounted more than 18 from the 7400 Plus encase all wire splices in a junction box Place conduit seals Crouse Hinds EYS 216 or equivalent between the 7400 Plus and the junction box e Use AMP or equivalent parallel or butt type splices for all wire connections e Ground the junction box e Trim any excess wire and connect the detector head s black white and red wires to terminal block TB1 terminals R C and A on the Cat Bead Input PCB as shown in Figure 3 3 28 of 54 087 0041 Rev B 7400 Plus Ze SCO TT Instruction Manual 3 6 Ca
8. Figure 3 9 Figure 4 1 Figure 4 2 Figure 4 3 Figure 4 4 List of Figures External Displey siria ena is iii 8 Motherboard as 10 Power DISTIDLION suenen tild als naaa 11 Internal Display Assembly cacon pacien 12 Analog Input PO BA viana o id 13 External Transmitter Wiring vin EENS 14 Bridge Sensor Input POBA E 15 2 Wire Transmitter Typical to Bridge Sensor Input PCB 16 3 Wire Transmitter Typical to Bridge Sensor Input PCB 17 4 20mA Analog Output PCBA ooocccccccccnononoocononcncnnnnncnnnnnnnnnnnncnnnnnccnanannns 18 Discrete Relay POB da 19 MODBUS Interface PCBA i 20 MOUNTING DIMENSIONS seine sione sasua 24 NEMA 7 teil 25 Sensor Voltage AUS 29 Cat Bead Sensor Wiring to Bridge Sensor Input PCB 31 Sensor Voltage Measurement 32 ZOO Ee 33 SE e Ed TEE 34 Typical Calibration Setup secre papales 36 Calibration Quick Guide E 38 Menu Structure of the 7400 Plus EE 40 Data Display SCIOG INS sarria si 41 Channel Setup MEnU i 42 System Configuration Menus an 45 v 087 0041 Rev B SAFETY 7400 Plus Instruction Manual This Page Left Intentionally Blank vi 087 0041 Rev B 7400 Plus Instruction Manual List of Tables Table 1 1 Acronym Quick Reference si 5 Table 3 1 Maximum Distance Between 6V Sensor Head and 7200 Plus 28 Tables Rails 50 Table A 1 MODBUS Register and Function Code
9. LOCKING THE 7400 PLUS MENUS IF THE 4 DIGIT PASS CODE IS LOST FORGOTTEN OR OTHERWISE UNAVAILABLE THE FACTORY MUST BE CONSULTED 4 4 3 History Log The History Log records up to 65 events on 8 screens Real time events such as Alarm trips Alarm Acknowledgements Calibrations and Power Applied will be captured by the 7400 Plus and displayed in the log 48 of 54 087 0041 Rev B 7400 Plus Instruction Manual This Page Left Intentionally Blank 49 of 54 087 0041 RevB SAFETY 7400 Plus Instruction Manual 5 Parts List and Maintenance 5 1 Parts List Table 5 1 Parts List Part Description Scott P N Motherboard 093 0446 Analog Input PCB 093 0465 Bridge Sensor 4 20mA Input PCB 093 0466 4 20mA Output PCB 093 0467 Discrete Relay PCB 093 0435 MODBUS Interface PCB 093 0438 2A Fuse on Mother PCB 093 0445 CPU Display PCB 093 0538 SOW NEAM 4X Div2 Power Supply PCB 093 0468 50W NEAM 7 Divi Power Supply PCB 093 0469 5 2 Scott Repairs When returning a product contact Technical Support to obtain Return Maintenance Authorization number prior to shipping for service repairs Phone 1 800 247 7257 e mail scotttechsupport tycoint com www scottsafety com 50 of 54 087 0041 Rev B 7400 Plus Instruction Manual This Page Left Intentionally Blank 51 of 54 087 0041 RevB SAFETY 7400 Plus Instruction Manual Appendix MODBUS Register and Function Code Summary Table A 1
10. Relay Setup Menu The Relay Setup menu allows configuring of both the standard Relay 1 amp Relay 2 housed on the motherboard and the six optional relays on the optional discrete relay PCB Both standard and optional relays are programmed in this menu Select the relay to be configured by pointing the arrow at the top menu item and press EDIT The field will scroll through all eight possible relays 2 standard and 6 optional e Fault Alarm 1 Alarm 2 Alarm 3 Votes controls the channel alarm combinations that will trip the selected relay Each vote entry requires that quantity of that type alarm to be active before this relay activates Relays activate when all combinations of votes are met For example if setting up standard relay 1 and the desired effect is to have the relay activate whenever a single alarm 1 occurs on any channel then select Alarm 1 vote equal to 1 However if the desired relay should activate whenever alarm 1 activates on all four channels select Alarm 1 votes equal to 4 Each relay can be set to any combination of votes e Failsafe set for YES causes this relay to be energized when its voting requirements are false no alarm condition and de energized when the alarm vote requirements are true The primary benefit of failsafe is loss of power places the relay contacts into the alarm condition e Over Ride menu allows entering one of the 16 different alarms that will trip this relay regardless of the Votes entries There are
11. Rev B 7400 Plus Instruction Manual Table A 1 MODBUS Register and Function Code Summary Variable Code Alias Read Function Code Write Function Chan 4 Alarm 1 Real 1009 3 N A Chan 4 Alarm 1 Divisor 41036 3 N A Chan 4 Alarm 2 Real i 3 N A Chan 4 Alarm 2 Divisor e 3 N A Chan 4 Alarm 3 Real 41039 3 N A Chan 4 Alarm 3 Divisor ZER 3 N A Memory ASCII Strings User Info Chan 1 40401 40405 N A User Info Chan 40406 40410 N A User Info Chan 3 40411 40415 3 N A User Inia Chana 40416 40420 3 N A 10 ASCII characters 2 per register assigned to the unit identifier as bytes EUNITS Chan 1 40421 40425 3 N A EUNITS Chan 2 40426 40430 NA EUNITS Chan 3 40431 40435 WA 3 N A EUNITS Chan 4 40436 40440 10 ASCII characters 2 per register assigned to the engineering units as read bytes Chan 1 ASCII Reading 40441 40443 N A Chan 2 ASCII Reading 40444 40446 3 NA Chan 3 ASCII Reading 40447 40449 3 WA 3 N A Chan 4 ASCII Reading 40450 40452 087 0041 Rev B 58 of 54 7400 Plus SAFETY Instruction Manual Table A 1 MODBUS Register and Function Code Summar Variable Code Alias Read Function Code Write Function 6 ASCII characters 2 per register reflecting the display readout Firmware Version Version 40453 40455 3 N A 4 ASCII characters 2 per register reflecting th
12. four alarms per channel and four channels and any one of these alarms may be used as the Over Ride This feature is useful when one channel s alarm has more significance than the others e Horn controls how activating this relay will affect the horn driver circuit connected to J2 on the motherboard Choices are NO STEADY or PULSE Warning level alarms might be set to pulse the horn with high alarms set for steady Personnel then recognize which alarm level is present by hearing the pulsing or steady horn e Acknowledge ON not allowed on Relay 1 allows Relay 2 to be deactivated during alarm conditions by an Alarm Reset This is useful if another audible device is being driven by the relay The acknowledge feature is not available for Relay 1 since it is often used for driving a warning light and Relay 2 for driving a horn It could be dangerous if an operator acknowledged the horn and the light since no indication of the high alarm condition remains 4 4 1 2 Clock Delays Menu The 7400PLUS monitors signals from inputs that may require varying times to stabilize after power is applied and after calibrations are complete Options available in the Clock Delays menu include 46 of 54 087 0041 RevB 7400 Plus Instruction Manual e Alarm Refresh menu allows reactivation of Acknowledged alarms after the time period expires This feature is used primarily to restart audible alarm devices after having been silenced by an acknowledge function via
13. serial port or pressing the Alarm Reset button An entry of O seconds effectively disables the Alarm Refresh function e Warm Up Delay menu allows setting how long alarm relays remain disabled after power is applied e Cal Delay determines how long alarm relays are inhibited after completing a calibration e Time and Date menu items are for setting the correct time and date The 7400 Plus is equipped with a 24 hour clock and calendar Time of day must be entered in 24 hour mode For example 6 00 00 PM must be entered as 18 00 00 4 4 1 3 Analog Setup Menu The system Analog Setup menu allows setting the 12 bit A D analog to digital counts and the 10 bit D A digital to analog counts for each of the four channels The live A D counts value for the channel selected is also shown on the bottom of the menu The default setting for A D counts is 400 for Min and 2000 for Max This is based upon a 0 20mA input providing 0 2000 counts or 100 counts per mA input e A D Min Max Raw counts menu entries define the input A D counts range for Zero and Span readings as described in Paragraph 4 3 4 The default settings for each channel are 400 to 2000 counts Standard inputs yield 400 counts at 4mA and 2000 counts at 20mA but for example if a special application requires the Zero reading at 6mA input and the Span reading at 18mA the correct A D Min Max Raw counts would be 600 to 1800 00 e D A Min Max Raw counts menu entries define the option
14. 4 Assy 10 0253 T RX Ss B Figure 2 12 MODBUS Interface PCBA This optional PCB mounts to connectors on the upper left corner of the 7400 Plus Motherboard TB1 provides two pairs of T Rx terminals and a floating terminal for shield continuation to multi drop 7400 Plus s onto an RS 485 cable without doubling wires into the same screw terminals RS 232 interface is made by connecting to DB9 connector S1 Refer to the Appendix for a list of all MODBUS registers and their function codes 20 of 54 087 0041 Rev B 7400 Plus Instruction Manual 2 2 Using the Keypad Navigation of the Menus displayed on the LCD is accomplished using the UP DOWN CAL NEXT EDIT and ALARM RESET magnetic keys Press where used in this manual refers to activating the magnetic key with the magnetic wand Upon entering a menu a pointer controlled by the UP DOWN keys indicates the selected item YES NO or ON OFF entries toggled by pressing the EDIT key Others such as Channel ID and Eunits fields may have many ASCII character possibilities Allowed ASCII characters are ABCDEFGHIJKLMNOPQRSTUVWXYZ N abcdefghijkimnoparstuvwxyz blank space 8 0123456789 lt gt EDIT places a cursor under the item and UP DOWN scrolls through each allowed entry The NEXT key moves the cursor to the next position within a field When the field is complete EDIT clears the cursor and loads the field into non volatile memory where it is retained indefinitely
15. AILURE TO DO SO COULD LEAD TO INJURY OR DEATH CAUTION THE CALIBRATION MODE IN THE 7400 PLUS SHOULD ONLY BE USED WHEN LOCAL CALIBRATION OF A MONITORING IS NOT POSSIBLE CALIBRATING AN INPUT SIGNAL AT MORE THAN ONE LOCATION WILL CAUSE INACCURATE READINGS AND COULD LEAD TO INJURY OR DEATH Scott Health amp Safety recognizes the potential of the 7400 Plus and remote monitors as a life saving device when operated and maintained correctly As such verifying proper operation of the 7400 Plus and remote monitors in the form of Span calibration is essential to ensure the 7400 Plus and remote monitors perform as intended in a potentially hazardous environment The frequency at which Span calibration occurs is best determined based on local regulatory standards company policies and industry best practices Scott Health amp Safety is not responsible for setting policies or practices Calibration of the 7400 Plus and remote monitors occurs in two stages Zero calibration is performed to establish baseline readings of atmospheres that are known to be free of toxic or combustible gases Span calibration is performed to ensure the monitor detects target gases within specified operating parameters Span calibration is the adjustment of the 7400 Plus and remote monitors response to match a known concentration of gas Sensors can lose sensitivity through normal degradation exposure to high gas concentrations or sensor poisoning Accurate calibration can b
16. CPU assembly attaches to the motherboard with 4 standoffs and connects via ribbon cable to S1 Input options that may be installed into the Input Option P1 connector located on the lower left side of the motherboard are an Analog Input PCB or a Bridge Sensor Input PCB The P2 connector may have an optional 4 20mA Output PCB The P3 connector may have an optional Discrete Relay PCB Another optional device that may be connected to the motherboard is MODBUS RTU RS 485 interface 2 1 2 Internal Display Assembly Removing the enclosure door provides access to the Internal Display Assembly Refer to Figure 2 4 The Display assembly has three screens to show the status of the four monitored channels A Quad screen is the default with a numerical representation of the values A Bar Graph Screen can be displayed by activating the NEXT key Arrows below the bars indicate alarm trip point values making it easy to identify channels at or near alarm The direction the horizontal 45 degree arrow side points indicates either a HIGH as shown on Channel 1 or LOW as shown on Channel 2 trip Left and Right hand arrows located at the ends of each bar graph point towards Channel Alarm LED s on the front panel Activating the NEXT key from the Bar Graph display displays the Trend screen This screen is a line graph depicting the current and previous thirty minutes of monitoring on each channel SW1 SW5 can be pressed to activate the switches instead of using the m
17. ITION OF 1 2 3 OR 4 WHERE 123 4 WOULD RETURN THE DEVISOR VALUE OF 10 Chan 1 Zero Real 41001 3 N A Chan 1 Zero Divisor ER 3 N A Chan 1 Span Real 41003 3 N A Chan 1 Span Divisor A1004 3 N A Chan 1 Alarm 1 Real 41005 3 N A Chan 1 Alarm 1 Divisor 0006 3 N A Chan 1 Alarm 2 Real di 3 N A Chan 1 Alarm 2 Divisor 41008 3 N A Chan 1 Alarm 3 Real 41003 3 N A Chan 1 Alarm 3 Divisor 41910 3 N A Chan 2 Zero Real SP 3 N A Chan 2 Zero Divisor SEI 3 N A 56 of 54 087 0041 RevB 7400 Plus Instruction Manual Table A 1 MODBUS Register and Function Code Summar Variable Code Alias Read Function Code Write Function Chan 2 Span Real Ee 3 N A Chan 2 Span Divisor 41014 3 N A Chan 2 Alarm 1 Real SES 3 N A Chan 2 Alarm 1 Divisor SS 3 N A Chan 2 Alarm 2 Real SS 3 N A Chan 2 Alarm 2 Divisor 1018 3 N A Chan 2 Alarm 3 Real RIGO 3 N A Chan 1 Alarm 3 Divisor SE 3 N A Chan 3 Zero Real Se 3 N A Chan 3 Zero Divisor 21008 3 N A Chan 3 Span Real 41043 3 N A Chan 3 Span Divisor G ren 3 N A Chan 3 Alarm 1 Real SES 3 N A Chan 3 Alarm 1 Divisor SEH 3 N A Chan 3 Alarm 2 Real ales 3 N A Chan 3 Alarm 2 Divisor SES 3 N A Chan 3 Alarm 3 Real 34057 3 N A Chan 3 Alarm 3 Divisor 1000 3 N A Chan 4 Zero Real 1081 3 N A Chan 4 Zero Divisor 41005 3 N A Chan 4 Span Real 41033 3 N A Chan 4 Span Divisor 41034 3 N A 57 of 54 087 0041
18. NSULATION SUITABLE FOR AT LEAST 250V FAILURE TO DO SO CAN CAUSE ELECTRICAL GROUNDS AND DAMAGE ELECTRONIC COMPONENTS OR RISK OF ELECTRICAL SHOCK 3 3 2 Optional External Power Supply Some applications require 24VDC power in excess of the 12 watts supplied by the 7400 Plus NEC Class 2 50W external supplies are available for Division 1 part 093 0469 and Division 2 part 093 0468 potentially hazardous area installations and both also include a NEMA 4X weather rating For more information contact Scott H amp S 26 of 54 087 0041 Rev B 7400 Plus Instruction Manual 3 4 Evaluating Wire Length and Size The minimum AWG wire size that can be used to connect the power supply to the transmitter is determined by the output voltage of the power supply the maximum current drawn by the transmitter and the voltage drop that occurs across the wiring When choosing the location of the transmitter and its power supply the size and length of the power supply wires become an issue if the wiring s voltage drop would cause the transmitter s input voltage to drop below its minimum operating voltage The distance 4 20 mA signals can travel is dependent upon several factors including the cable gauge DC power supply voltage level and impedance of the input of the receiving device Assuming a nominal 24 VDC power supply if powered by the 7400 Plus maximum total loop resistance is 750 ohms in a 3 wire mode NOTE SCOTT HEALTH amp SAFE
19. SCOTT SAFETY Instruction Manual 7400 Plus Four Channel Controller READ AND FOLLOW THE ENTIRE CONTENT OF THIS MANUAL PRIOR TO USE FAILURE TO DO SO MAY RESULT IN SERIOUS INJURY OR DEATH COPYRIGHT O 2012 SCOTT ALL RIGHTS RESERVED 087 0041 Rev B SAFETY 7400 Plus Instruction Manual This Page Left Intentionally Blank 087 0041 Rev B 7400 Plus Instruction Manual Table of Contents 1 Safety and General Information AAA 1 1 1 Important ent 1 1 2 Certifications and ApprovalS i 1 1 3 Warnings Cautions and Notes AAA 2 1 3 1 General Warnings and Cautions sssssseeeeeeeeeeenenrrreeeeernrnnnnnnneeerrenne 2 1 4 General Rules of Use a 3 1 5 EC E 4 1 5 1 Contacting Scott Health 8 Safety nn 4 1 6 Acronyms Quick Reference ii 5 Z Nd 7 2 1 Physical Components seed 7 2 1 1 jo A ini 9 2 1 2 Internal Display Assembly i 12 2 1 3 WOU le e ssa iaia 13 2 1 3 1 Analog Input Option 13 2 1 3 2 Bridge sensor Input Option csi 14 2 1 3 2 1 Cat Bead Sensor Input Wiring DiagramS ii 16 2 1 4 4 20 mA Analog Output Option 18 2 1 5 Discrete Relay Option session 18 2 1 6 MODBUS RS 232 RS 485 Interface Option 19 2 2 Using the A 21 2 3 le ee e pica ica 22 3 Physical we usina ii 24 3 1 Installation Considerations un 24 3 2 Mounting the 7400 TEE 24 3 2 1 Optional NEMA 7 Explosion Proof Enclosure 25 3 3 Electrical C
20. Summary cccccccccccnnnnncncnnccnnnnnnn 52 vii 087 0041 Rev B SAFETY 7400 Plus Instruction Manual This Page Left Intentionally Blank vili 087 0041 Rev B 7400 Plus Instruction Manual 1 Safety and General Information WARNING ALL INDIVIDUALS WHO HAVE OR WILL HAVE RESPONSIBILITY FOR USING OR TESTING THIS PRODUCT MUST READ AND UNDERSTAND THE CONTENTS OF THIS MANUAL THE PRODUCT WILL PERFORM AS DESIGNED ONLY IF USED AND TESTED IN ACCORDANCE WITH THE MANUFACTURER S INSTRUCTIONS FAILURE TO FOLLOW MANUFACTURER S INSTRUCTIONS WILL RENDER THE WARRANTY AND APPROVALS NULL AND VOID FAILURE TO FOLLOW THESE INSTRUCTIONS MAY ALSO RESULT IN SERIOUS INJURY OR DEATH 1 1 Important Notices Scott Health and Safety can take no responsibility for use of its equipment if it is not used in accordance with the instructions If further operational or maintenance details are required but not provided in this manual contact Scott Health and Safety or their agent Scott Health and Safety shall not be liable for any incidental or consequential damages in connection with any modifications errors or omissions in this manual While every effort has been made to ensure accuracy in this owner s manual no responsibility can be accepted for errors or omissions Additionally industry standards codes and legislation are subject to change This publication is not intended to form the basis of a contract and the company reserves the right to amend
21. TY CONTROLLERS HAVE AN INPUT RESISTANCE OF 100 OHMS The maximum signal loop resistance that can be connected to a transmitter s output is 800 ohms 24 VDC 400 ohms 12 VDC In almost all cases the wire size chosen for the power supply leads will be more than adequate for the 4 20 mA signal lead For example an 18 AWG wire provides a 4 20 mA signal lead wiring distance of approximately 34 000 feet NOTE MAXIMUM SIGNAL LOOP RESISTANCE IS DEFINED AS THE SUM OF THE 4 20 MA SIGNAL WIRE RESISTANCE THE RECEIVER S INPUT RESISTANCE NORMALLY 250 OHMS AND THE RESISTANCE OF THE COMMON GROUND WIRE BETWEEN THE TRANSMITTER AND POWER SUPPLY 27 0f 54 087 0041 RevB SAFETY 7400 Plus Instruction Manual 3 5 Sensor Head Wirin Each 5 5V Sensor Head is supplied with 6 of wire for direct mounting to the transmitter housing Each 6V Sensor Head is supplied with 18 of wire allowing it to be mounted on the transmitter housing either directly or by a short section of 3 4 conduit Both types of Sensor Heads can have a three conductor cable spliced to the attached wiring for increased distances between the 7400 Plus and the Sensor Head location The wiring attached to the Sensor Head is already sealed and requires no additional sealing to conform to NEC requirements for explosion proof installations as long as the detector head is mounted no further than 18 from the transmitter NEC Article 501 5 a 1 Table 3 1 shows the maximum distances
22. Transmitter 4 20 Figure 2 7 Bridge Sensor Input PCBA The Bridge Sensor Input PCBA allows these sensors to be connected directly to the 7400 Plus without additional signal conditioning or transmitters Each channel is equipped with a bridge amplifier balance potentiometer and an adjustable switching regulator for setting the correct sensor excitation voltage A 3 position coarse gain jumper allows setting the gain of the bridge amplifier Fault supervision circuitry forces the 7400 Plus into a FAULT condition upon sensor failure or removal This option may also be configured to accept 4 20 mA inputs into channels 3 amp 4 to allow mixing cat bead sensors and 4 20 mA current loops into the same board Placing either channel s 2 position LEL 4 20mA jumper JP5 or JP6 into the 4 20 mA position and installing the associated precision 100 ohm socketed resistor allows 4 20 mA signals to be applied to the mA mA terminals Precision 100 ohm resistors are taped to the inside of the 7400 Plus enclosure NOTE WHEN INSTALLING A CAT BEAD SENSOR A ONE TIME ONLY INITIAL SETUP IS REQUIRED REFER TO PARAGRAPH 3 4 FOR MORE INFORMATION 15 of 54 087 0041 Rev B 7400 Plus Instruction Manual Note JP5 Ch3 or JP6 Ch4 must be set to the correct position of the input Note If a 4 20mA loop is in use TR1 Ch3 or TR2 Ch4 must havea 100 ohm resistor installed COMMON SIGNAL AC Power Source In
23. UST BE INSTALLED WITH INDUCTIVE LOADS TO PREVENT RFI NOISE SPIKES RELAY WIRING IS TO BE KEPT SEPARATE FROM LOW LEVEL SIGNAL WIRING FAILURE TO DO SO COULD CAUSE FAULTY RELAY ACTIVATION 22 of 54 087 0041 Rev B 7400 Plus Instruction Manual This Page Left Intentionally Blank 23 of 54 087 0041 RevB SAFETY 7400 Plus Instruction Manual 3 Physical Installation 3 1 Installation Considerations 3 2 Mounting the 7400 Plus The standard 7400 Plus wall mounted unit is NEMA 4X rated The terminal cover must be installed with the bevel on top to prevent moisture from entering the internal components Two screws on the enclosure door must remain in place to maintain the rating of Class Division 2 Groups A B C and D or non hazardous locations only Two NPFT fittings are provided on the bottom side of the unit to route electrical connections and connect conduit Conduit runs should not be weight bearing Use provided mounting holes to wall mount the 7400 Plus Refer to Figure 3 1 gt 801 203 45 mm 3 17 e 80 52 mm HEALTH amp SAFETY Series 7400 Plus es ALARM1 O O KEYPAD ALARM 2 O C e O CAL IN PROGRESS ALARM 3 O O FAULT ALARM Magnetic PN Keypad Gell Keypad buttons behind door Power 100 240 V 50 60 Hz 45A H 236 22 mm WWW SCOTTHEALTHSAFETY COM e TTS enoo ri KI et 219995 0 92 Install terminal 23 37 mm cover as shown with beval up to pre
24. agnetic wand when the Internal Display Assembly is accessible p2 Programming Header Alarm LED s Indication LED s Alarm 1 3 H P 1 Keypad EngraUnit s d Al Alarm 2 Cal in Progress Alarm 3 Fault Alarm Quad Screen Shown NEXT key to LCD Contrast display Bar Graph or Trend screens Aiman et RI RI RI OIE SW1 SW5 are the magnetic keys allowing operator interface DOWN NEXT EDIT RESET CAL Figure 2 4 Internal Display Assembl 12 of 54 087 0041 Rev B 7400 Plus Instruction Manual 2 1 3 Input Options 2 1 3 1 Analog Input Option The Analog Input PCB P N 093 0465 option may be installed at P1 on the motherboard Refer to Figure 2 5 R1 Ch1 100 ohm 4 20mA terminator R2 Ch2 100 ohm 4 20mA terminator R3 Ch3 100 ohm 4 20mA terminator R4 Ch4 100 ohm 4 20mA terminator Spare Spare 100 ohm 4 20mA terminator T1B1 O O Refer to Figure 2 6 for transmitter wiring diagrams Figure 2 5 Analog Input PCBA The Analog Input Option allows interfacing 7400 Plus to field transmitters having 4 20mA or voltage outputs Remove socketed 100 ohm R1 R4 terminators for 0 4 VDC max voltage inputs The Analog Input PCBA utilizes a 12 bit A D converter such that 4mA provides 400 counts and 20mA 2000 counts Min Max raw counts menus default to 400 2000 but may be adjusted between 0 4095 refer to Paragraph 4 4 1 3 for more detailed information TB1 amp TB2 provide each cha
25. al future 4 20mA output PCB s input Ideally 200 to 1000 yields a 4 20mA output but very slight modifications may be needed to provide precise 4mA and 20mA values for each channel 4 4 1 4 Horn Acknowledge Menu The 7400 Plus display PCB is equipped with a small audible piezo that chirps when keys are pressed providing an audible feedback to the operator J2 on the motherboard is the driver output for the optional 100dB piezo e Fault Alarm 1 Alarm 2 and Alarm 3 menu entries allow programming of which alarms activate the optional or if selected local piezo Options include Off On Steady or Pulse e Local Piezo is selectable to mimic the optional 100dB horn e Relay 2 ACK determines if standard relay 2 may be acknowledged by an Alarm Reset ON causes an Alarm Reset to silence the horn even though an alarm condition remains active 4 4 2 System Security Menu A 4 digit Pass Code entered and confirmed in this menu item locks all menus Viewing menus is not denied but attempts to edit variables flashes the Locked message on the LCD Authorized individuals locking the system should first enter a name phone number or other contact information into the 12 character field on the top line of the Security screen To lock or unlock the system the correct 4 digit authorization number must be entered into the Pass Code field 47 of 54 087 0041 Rev B SAFETY 7400 Plus Instruction Manual NOTE GIVE CAREFUL CONSIDERATION BEFORE
26. deactivated using a remote alarm reset switch Relay 1 will always remain unaffected to ensure an indication of an alarm remains e J2 24VDC output for the optional 100db piezo annunciator TB3 24 VDC universal output power supply with up to 350mA available to power optional remote devices such as alarms horns lights relays etc 24VDC is only outputted when AC power is available to the 7400 Plus Refer to Figure 2 4 for distribution of AC and DC power Universal Input Power Supply 24 VDC 100 240 Out VAC In To Local Controller Circuits TB5 To optional Analog Input PCB 24VDC located at P2 S L1 L2 eno L Loc paro L AUX J 100 240 VAC SUPPLY POWER 45A 50 60 Hz INPUT OUTPUT AC POWER LEE only with AC Primary Power Figure 2 3 Power Distribution e TB4 Provides output power for standard relays K1 and K2 Each relay is 5A resistive SPDT form C dry contact CAUTION RELAYS ARE RATED FOR RESISTIVE LOADS INDUCTIVE LOADS SUCH AS CONTACTOR COILS OR MOTORS MAY CAUSE CONTACT ARCING WHICH EMITS RFI INTO THE SENSOR SIGNALS USE APPROPRIATE SNUBBERS AND MOV S ACROSS INDUCTIVE LOADS AND KEEP WIRING AWAY FROM SIGNAL WIRES FAILURE TO DO SO COULD RESULT IN RFI AND NEGATIVELY EFFECT EQUIPMENT PERFORMANCE e TB5 Terminals for AC power input AC power must be 100 240VAC 0 45A 50 60Hz Terminal 3 must be grounded to earth 11 of 54 087 0041 Rev B SAFETY 7400 Plus Instruction Manual The Display
27. e achieved only if specific concentrations of the correct gases are used Span calibration should be performed when a new sensor is installed Scott Health amp Safety recommends a daily Zero calibration be performed prior to each day s use and when the monitor displays a reading other than its baseline reading in an atmosphere known to be free of any toxic or combustible gases When an atmosphere is not known to be free of toxic or combustible gases a Zero Air calibration cylinder may be used Optional 4 20mA outputs if equipped transmit 1 5mA during CAL MODE and 4mA during the subsequent CAL DELAY to prevent external alarms during calibration 35 of 54 087 0041 Rev B SAFETY 7400 Plus Instruction Manual Follow these 7400 PLUS sensor calibration guidelines e Calibration from the 7400 Plus should normally be performed on sensors only Typical calibration of remote transmitters should occur at the transmitter e Calibration accuracy is only as good as the calibration standard accuracy Scott H amp S recommends calibration standards with NIST National Institute of Standards and Technology traceable accuracy to increase the validity of the calibration Do not use a gas cylinder beyond its expiration date Calibrate a new sensor before use Allow the sensor to stabilize before starting calibration Calibrate using zero air to ensure the highest accuracy Scott Stainless Steel Sensor Head Gold Bell Sensor Head Gas Calibrati
28. e firmware version 59 of 54 087 0041 RevB SCOTT Health 8 Safety Monroe Corporate Center PO Box 569 Monroe NC 28111 Telephone 1 800 247 7257 FAX 704 291 8330 www scotthealthsafety com Printed in the USA Copyright O 2009 SCOTT All Rights Reserved
29. es ve LB MW h 5g gE LZ A Gold Bell 6V Sensor Head C1 DD Figure 3 4 Cat Bead Sensor Wiring to Bridge Sensor Input PCB 31 of 54 087 0041 Rev B SAFETY 7400 Plus Instruction Manual 5 Reapply system power and confirm correct voltage across each sensor s A amp R terminals NOTE IF SENSOR HEAD IS REMOTE AND ADDITIONAL WIRE LENGTH HAS BEEN ADDED IT WILL BE NECESSARY TO MEASURE THE EXCITATION VOLTAGE AT THE SENSOR HEAD TO COMPENSATE FOR I R VOLTAGE LOSSES IN THE WIRING OR If Gold Bell Sensor Head If Scott Sensor Head wires are long measure wires are long measure a voltage at sensor voltage at sensor 1 head using a Sensor head Adapter Board SEECER RC AIR CA Chan 1 Chan 2 o Head Sensor Sensor Adapter Board P N 023 4027 EXC1 EXC2 EXC3 EXC4 Sc sa Sensor Calibration O Q Y O O O o Y Take Measurement at Sensor Adapter Board He He 00 005 E i a ouz o Figure 3 5 Sensor Voltage Measurement 32 of 54 087 0041 Rev B IT SCOTT 7400 Plus SAFETY Instruction Manual 6 With zero air applied to the sensor adjust the Balance potentiometer for a reading of zero on the front panel LCD R C AIR C ARCA Chan 1 Chan 2 mA Chan 3 Adjust for a Zero reading on front panel LCD with _ Zero Air on Sensor Figure 3 6 Zero Balance 33 of 54 087 0041 Rev B SAFETY 7400 Plus Instruction Manual 7 Apply 50 span gas to the sensor and al
30. ewing of different channels is accomplished by activating the NEXT key Refer to Figure 4 2 4 3 Channel Setup Menus Each of the four monitored channels are customized using the menus for each individual channel as shown in Figure 4 3 From any of the Data Display screens press EDIT to enter the Setup Menu 41 of 54 087 0041 Rev B SAFETY 7400 Plus Instruction Manual SETUP firmware revo EDIT Channel x SETUP EDIT FAULT Setur annel 1 Fault eege wl Channel 2 Alarm 1 B Fault Level 10 Channel 3 Alarm 2 ON Delay Bs Channel 4 Alarm 3 OFF Delay Elo System Configure Security CAL Setur History Alarm 1 2 3 menus are identical Alarm x Setur Set Point 20 DN D G elay Bs OFF Delay Bm Low Trip O Latching NO CHANNEL x CONFIG Name 10 digits EUNIT 10 digits o Span Decimal Pts B Channel Active YES Ch x CAL SETUP Calibrate zero Gas 2 8 Span Gas 58 8 Set UNITY Gain CAL Offset 6 068 CAL Gain 1 000 Figure 4 3 Channel Setup Menu 4 3 1 Setup Menu As shown in Figure 4 3 the Setup Menu is the first menu after pressing the EDIT key from any Data Display along with a cursor for menu navigation Use the UP and DOWN keys to navigate the pointer to the whichever of the 4 channels desired and press EDIT 4 3 2 Channel Setup Entry Menu Channel Setup Entry menu allows configuration of all variables for the selected channel including Fault Alarm 1 Alarm 2 Alarm 3 Conf
31. ignals from sensors directly The 7400 Plus is equipped with a fault and three alarm levels per channel with features such as ON OFF delays latching relays and alarm Acknowledge A dedicated horn driver circuit for a local audible alerts is also standard Two standard 5 amp alarm relays are configurable via the Alarm Voting menu to make relays trip based upon various alarm combinations Real Time Clock and Calendar are also standard Options such as 4 20mA outputs discrete relays for each alarm and audible alerts are easily added RS 485 MODBUS RTU or Ethernet MODBUS TCP ports are also available for sending data to PC s PLC s DCS s or other Scott Health amp Safety controllers A 128 x 64 pixel graphic LCD readout displays monitored data as bar graphs 30 minute trends and engineering units System configuration is accomplished using displayed menus and the keypad All configuration data is retained in non volatile memory during power interruptions The five button symbols below the display are magnetically activated using the supplied magnetic wand without opening the enclosure Opening the enclosure door provides access to the touch keypad 2 1 Physical Components Refer to Figure 2 1 7 of 54 087 0041 Rev B 7400 Plus Instruction Manual 087 0041 RevB HEALTH amp SAFETY Series 7400 Plus COMMON LEVEL ALARMS EngrgUnits ALARM 1 LEL_CH4 Ef rt ALARM 2 O 20 9 ES ALARM 3 _ took aa CO
32. igure and CAL Setup NOTE EACH CHANNEL MENU IS IDENTICAL AND MUST BE SET INDIVIDUALLY OPTIONS SELECTED FOR CHANNEL 1 WILL NOT EFFECT CHANNEL 2 AND SO ON 4 3 2 1 Fault Menu Fault alarms are always low trip alarms activated when an input goes below the set point Fault alarms are not latching 42 of 54 087 0041 RevB 7400 Plus Instruction Manual The Fault alarm when activated will cause the associated LED on the lower right side of the front panel to flash until acknowledged by pressing the ALARM RESET button Once acknowledged the LED will remain steady until either the fault clears or a new alarm occurs at which point the LED will flash again Options available in the Fault menu include e Fault Level is the set point established at which point the system is able to recognize a fault has occurred e On Delay sets the time in seconds for a fault condition to delay before reporting a fault condition e Off Delay sets the time in minutes that a fault condition should remain cleared before removing fault indications 4 3 2 2 Alarm Menu Alarm LED s on the left side of the front display are yellow for Alarm 1 and red for Alarms 2 and 3 This is because Typical applications use Alarm 1 as an alert warning Alarm 2 as a High alarm and Alarm 3 as a Shut Down indicator However there is no functional difference between the three alarms Options available in the Alarm Menu include e Set Point is entered in engineeri
33. ism after installation to prevent access to high voltages by unauthorized personnel LIMIT OF CERTIFICATION Only the combustible monitor portions of this instrument have been assessed by CSA for 122 2 No 152 performance requirements This equipment is suitable for use in Class I Division 2 Groups A B C and D or non hazardous locations only 3 of 54 087 0041 Rev B SAFETY 7400 Plus Instruction Manual 1 5 Warranty Scott Health amp Safety SCOTT a division of Tyco International warrants it s 7400 Plus Controller PRODUCTS THE PRODUCTS to be free from defects in workmanship and materials for a period twelve 12 months from the date of original manufacture by SCOTT This warranty applies to all components of THE PRODUCTS SCOTT s obligation under this warranty is limited to replacing or repairing at SCOTT s option THE PRODUCTS shown to be defective in either workmanship or materials To maintain the warranty THE PRODUCT must be installed and maintained in accordance with the operating and maintenance instructions include with THE PRODUCT Only personnel of SCOTT or when directed by SCOTT authorized SCOTT agents are permitted to perform warranty obligations This warranty does not apply to defects or damage caused by any repairs of or alterations to THE PRODUCTS made by owner or any third party unless expressly permitted by SCOTT product manuals or by written authorization from SCOTT To obtain performance under this warran
34. it EDIT to Set ZERO EDIT to Set SPAN NEXT SPAN CAL Mode NEXT EXIT CAL Mode Wegen Prem CO Press EDIT Press EDIT CAL Purge time period 3 A inhibits alarm relays to continue to continue show for 5 seconds co ZERO CAL Limit Exceeded ookoo Successful If ZERO Cal Fails If ZERO Cal OK Figure 3 9 087 0041 Rev B show for 5 seconds o o od o CHC pp o E E od SPAN CAL rr Successful Limit Exceeded pd HR ROHR OH COR aI aE aC a If SPAN Cal Fails If SPAN Cal OK Calibration Quick Guide 38 of 54 7400 Plus Instruction Manual This Page Left Intentionally Blank 39 of 54 087 0041 RevB 7400 Plus Instruction Manual 4 Operation 4 1 Menu Structure QUAD Channel Controller Menu Tree Engrg Unit Screen 38 1 EngrgUnits Al 20 9 Oxygen Press EDIT to enter SETUP firmware rev Channel 1 Channel 2 Channel 3 Channel 4 System Security o History Press EDIT to advance to next menu Press NEXT to go back to previous menu Press UP or DOWN to navigate cursor 087 0041 RevB EDIT Ch Trend Screen Chx 30 1 PPM CO Bar Graph Screen FAULT LEL CH4 1 20 9 e Oxygen 75 1 pem CO m Channel x SETUP EDIT Fault _ Alarm 1 Alarm 2 Alarm 3 Configure CAL Setur FAULT Setur Fault Level 10 ON Delay Bs OFF Delay 6m Select Item press Edit System Menus A
35. larm 1 2 3 menus are identical Alarm x Setur Set Point 28 ON Delay Bs OFF Delay am Low Trip NO Latching NO o CHANNEL x CONFIG Name 10 digits EUNIT 10 digits zero B Span 100 Decimal Pts Channel Active YES m Ch x CAL SETUP Calibrate Zero Gas B a Span Gas 50 0 Set UNITY Gain CAL Offset 0 600 CAL Gain 1 000 SYSTEM SETUP RELAY SETUP Relay EDIT Standard Ort Relay 1 Clock Delays Fault Votes B Remote Id 001 Alarm 1 Votes 1 Analog Setup Alarm 2 Votes B Horn Acknowledge BE Votes so Track Negative NO Over Ride NONE m SYSTEM SECURITY CLOCK DELAYS Contact Name Alarm Refresh Bs Pass Code Warm Up Delay 64s Cal Delay 64s Time 17 34 22 Unlocked Date 08 19 07 110197 02 30 19 Ch2A10 ANALOG SETUP 110107 62 21 43 LCLACK Channel 1 4 110107 02 12 22 Ch2AII A D Min Raw 300 102407 23 36 56 Ch4A10 A D Max Raw 4000 102407 23 01 13 Ch4A1I D A Min Raw 200 102407 23 36 32 Ch4A20 D A Max Raw 1000 102407 23 36 11 Ch4A30 182407 23 36 17 Ch4A10 A D Counts 882 HORN ACK SETUP Fault OFF Alarm 1 PULSE Alarm 2 ON Alarm 3 OFF Relay 2 ACK ON Local Piezo ON Figure 4 1 Menu Structure of the 7400 Plus 40 of 54 7400 Plus Instruction Manual 4 2 Data Display Screens The primary source of operator interface with the 7400 Plus is through the LCD Display Data can be monitored using any one of three screens Se
36. lect the NEXT key to cycle between Data Displays screens Engrg Unit Screen Bar Graph Screen Ch Trend Screen ZA 1 25 30 1 Engr Units 30 1 Fem CO n gt I i EngrgUnits FAULT LEL CH4 E NEXT NEXT 20 9 Oxygen n gt Pressing NEXT from the Channel Trend Screen cycles through each of the four channels while remaining in the trend screen After the fourth channel pressing NEXT cycles to the Eunits Screen NEXT Figure 4 2 Data Display Screens 4 2 1 Engineering Unit Screen The Engineering Unit Display screen simultaneously displays information of each of the four channels at once Values are shown with their Eunits tag as well as any alarm of fault indication A1 A2 A3 and FL icons will appear and flash at the lower right of each reading if the corresponding alarm or fault activates Refer to Figure 4 2 4 2 2 Bar Graph Screen The Bar Graph screen simultaneously displays information of each of the four channels at once relative to alarm settings Values and faults are displayed in Eunits above a graphical bar representation of current values against alarm set points Alarm set points are shown with dashed lines Refer to Figure 4 2 4 2 3 Trend Screen The Trend screen displays information from a single channel at one time 30 minutes of data is displayed in a graphical line charted against alarm set points Alarm set points are shown with dashed lines representing A1 A2 and A3 Vi
37. low the reading to stabilize Position the 3 position Coarse Gain jumper into the position that displays a reading at the front Panel LCD of between 45 and 65 Gain settings for each jumper position are as follows no jumper 1 right 7 middle 21 left 41 Multiple jumpers have an additive affect upon gain so the right and middle jumpers together provide a gain of 28 Ont 57 SISISISISISISISISISISIS R C AJR C AJR OU AJR GWA Chan 1 Chan 2 mA mA Chan 3 Chan 4 ESCH EXC2 EXC3 EXC4 BALI BA2 BA3 BA4 N Set Jumper with 50 Span gas applied to sensor so that the front panel LCD displays between 45 and 65 Figure 3 7 Balance Adjustment Further calibration of this sensor now requires only typical calibration as described in Paragraph 3 7 34 of 54 087 0041 Rev B 7400 Plus Instruction Manual 3 7 Calibration Calibration from the 7400 Plus should normally be performed on sensors only Typical calibration of remote transmitters should occur at the transmitter WARNING OPERATING A DETECTOR THAT HAS EXCEEDED ITS CALIBRATION DATE CAN CAUSE FALSE READINGS OF DETECTED GASES READINGS OBTAINED WHILE UNIT IS OUT OF CALIBRATION ARE INVALID AND COULD LEAD TO DEATH OR INJURY WARNING LOCAL ALARMS ARE INHIBITED IN THE 7400 PLUS WHILE IN CALIBRATION MODE VERIFY THE ENVIRONMENT IS CLEAN AND FREE OF HAZARDOUS GASES AND TOXINS OR HAVE MONITORING PERFORMED BY ANOTHER UNIT PRIOR TO CALIBRATING F
38. lsafe 1 a 1 Alarm 2 Votes D a NO Over Ride NONE m SYSTEM SECURITY Contact Name CLOCK DELAYS Alarm Refresh ds Pass Code Warm Ur Delay 60s Cal Delay 68s Time 17 34 22 Unlocked Date 08719707 110107 62 30 19 Ch2A10 110107 62 21 43 LCLACK 110107 62 12 22 Ch2A11 102407 23 36 56 Ch4A10 102407 23 01 13 Ch4A1l 102407 23136132 Ch4A20 102407 23 36 11 Ch4A30 ANALOG SETUP Channel 1 4 D Min Raw 800 RD Max Raw 4000 D A Min Raw 200 D A Max Raw 1000 102407 23 36 17 Ch4AIO Y A D_Counts 882 _ HORN ACK SETUP Fault OFF Alarm 1 PULSE Alarm 2 ON Alarm 3 OFF Relay 2 ACK ON Local Piezo ON Figure 4 4 System Configuration Menus 45 of 54 087 0041 Rev B SAFETY 7400 Plus Instruction Manual 4 4 1 System Setup Menu The System Setup menu allows the user to navigate to further system options affecting all channels setting a remote ID and whether to track negative values or not Setting the Remote ID allows setting RTU address for the optional slave MODBUS serial port This slave port may be used to transfer 7400 Plus data to a host device such as a PC PLC DCS or even other Scott Health amp Safety Controllers such as the Sentinel 16 Controller The slave port is addressable allowing many 7400 Plus controllers to connect to a single RS 485 cable A converter is available to make this port compatible with Ethernet TCP IP networks 4 4 1 1
39. lution the reading will have and if the channel is Active e Name allows the user to give the channel a unique name typically of the gas or toxin the channel is measuring 43 of 54 087 0041 Rev B SAFETY 7400 Plus Instruction Manual e unit allows the user to give the channel a unique measurement value for example ppm or e Zero and Span values are specified by the user to identify the range of Eunits being measured on a channel from the 4 20mA signal For example if a channel is measuring 0 10ppm chlorine the Zero value should be 0 000 and the Span value 10 00 NOTE ZERO AND SPAN VALUES SHOULD ALWAYS BE ENTERED USING FOUR DIGITS IN THIS MENU REGARDLESS OF OPTIONAL DECIMAL POINT SETTINGS e Decimal pts sets the number of digits to display beyond the decimal point for the channel display limited to zero to four digits At zero digits a reading of O ppm is displayed as 0 while at 4 digits the reading is displayed as 0 000 Conversely a reading of 100 ppm would be displayed as 100 at zero digits and 100 0 at four digits e Channel Active is set to either yes or no depending on whether the channel is being utilized When No is selected alarms are inactive on that channel and a line will be drawn though the channel on the LCD display 4 3 4 Cal Setup Menu The Calibration Setup Menu supports push button calibration of Zero and Span values This feature should be utilized only when there are no other zero span controls within
40. mA output DAC digital to analog converter is accomplished via the Analog Setup menu Refer to Paragraph 4 4 1 3 for more details 2 1 5 Discrete Relay Option The Discrete Relay PCB P N 093 0435 option may be installed at P3 on the Motherboard CAUTION RELAYS ARE RATED FOR RESISTIVE LOADS INDUCTIVE LOADS SUCH AS CONTACTOR COILS OR MOTORS MAY CAUSE CONTACT ARCING WHICH EMITS RFI INTO THE SENSOR SIGNALS USE APPROPRIATE SNUBBERS AND MOV S ACROSS INDUCTIVE LOADS AND KEEP WIRING AWAY FROM SIGNAL WIRES FAILURE TO DO SO COULD RESULT IN RFI AND NEGATIVELY EFFECT EQUIPMENT PERFORMANCE Refer to Figure 2 11 18 of 54 087 0041 Rev B My SCOTT 7400 Plus SAFETY Instruction Manual m a n Wiri f Relay K1 Niri fR lt 4 I Normally Open 1 Normally Open K1 1 K1 10 Upper Terminal i Upper Terminal Block Block K1 3 I K1 12 Lower Terminal Common Lower Terminal Common Block Block K1 2 I K1 11 Middle Terminal Middle Terminal Block l Block Normally Closed Normally Closed Wiring of Relay K2 i Wiring of Relay K5 Normally Open e Normally Open K1 4 I K1 13 ro Upper Terminal Upper Terminal Block H Block 1 K1 15 I Lower Terminal Common 1 Lower Terminal Common Block 1 Block K1 5 1 K1 14 Y Middle Terminal Middle Terminal Q Block I 3 Normally Closed H Normally Closed El nnee Le ze e a o o e e ge e e e e e e e e e zm E Wiring of Relay K3 Wiring of Relay K6 o 1 ES Normall
41. max output Ii I Ipower source Tie iground conduit runs ITB5 GND to Earth to protect from RFI I 1 sources Do not use li I wires longer than GO H wem wm wm wm mm wm wm wm oe Zem ae e dir eee em wm wm wm wm wm ss wm mm mm mm mm wm wm wi Figure 2 2 Motherboard 10 of 54 087 0041 RevB 7400 Plus Instruction Manual Connections to J1 and J3 are not covered by CSA certifications Discrete Relay Option 093 0435 Discrete Relay L1 Go 1 e ee eas DRY CONTACTS AC PQNER i TB4 e TB5 i SA resistive SPDT Universal 100 form C dry 1 240 Vac primary contact relay Power source i loutputs Use GND terminal Idiode snubber 1 13 must be tied to Idevices when learth for proper Iswitching inductive Ishielding of input loads _____ signals ____1 f3 SCOTT 7400 Plus SAFETY Instruction Manual e TB1 Terminals for DC power input DC power must be 10 30V DC max 3 Watts When connected without an AC power source at TB5 the DC power input is the primary power source for the 7400 plus When connected with an AC power source DC power inputted at TB1 is a backup in the event AC power input is lost CAUTION REGARDLESS OF AN AC POWER INPUT AT TB5 POWER TO THE 7400 PLUS MUST BE GROUNDED TO EARTH USING TERMINAL 3 OF TBS FAILURE TO DO SO COULD CAUSE COMPONENT DAMAGE e TB2 Terminals for a remote alarm reset switch If enabled in the menu options Relay 2 may be acknowledged and
42. mware value as Version X 100 D2A Chan 1 31001 4 N A D2A Chan 2 31002 4 N A D2A Chan 3 31003 4 N A D2A Chan 4 31004 4 N A 12 bit value representing the D2A value of 800 0 to 4000 100 after all cal features are applied Chan 1 Status 31005 4 N A Chan 2 Status 31006 4 N A 53 of 54 087 0041 RevB 7400 Plus Instruction Manual Table A 1 MODBUS Register and Function Code Summary Variable Code Alias Read Function Code Write Function Chan 3 Status 31007 4 N A Chan 4 Status 31008 4 N A 16 bit status words bit assignment for each channel ALARM1_BELOW ALARM2_BELOW ALARM3_BELOW ALARM1_LATCH ALARM2_LATCH ALARM3_LATCH ALARM3_ACTIVE CHANNEL_DISABLED CHANNEL_CAL BITO BIT1 BIT2 BITS BIT4 BITS BIT6 BIT7 BIT8 System Status Word 31009 4 N A 16 bit status word bit assignment for system status PIEZO_DRIVE BIT6 HORN_ACK BIT7 K1_HORN_DRIVE BIT8 K2_HORN_DRIVE BIT9 K1_HORN_PULSE BIT10 K2_HORN_PULSE BIT11 K1_FAILSAFE BIT12 K2_FAILSAFE BIT13 K2_ACK BIT14 LOCK BIT15 Alarm Status Word 31010 4 N A 16 bit status word bit assignment for system status 087 0041 Rev B CHAN1 FAULT BITO CHAN1 ALARM1 BIT1 CHAN1 ALARM2 BIT2 CHAN1 ALARM3 BITS CHAN2 FAULT BIT4 CHAN2 AL ADM BITS CHAN2 ALARM2 BIT6 CHAN2 ALARM3 BIT7 54 of 54 7400 Plus SAFETY Instruction Man
43. ng units and determines the value where the alarm trips For example if a channel monitors 0 50 ppm H2S and the desired alarm level is 10 ppm the correct entry is 10 00 A one percent dead band prevents alarm chatter meaning after tripping an alarm the input must move at least 1 of full scale back through the set point for the alarm to auto reset e ON Delay OFF Delay entries allow ON and OFF time delays affecting how long the trip point must be surpassed before an alarm event transition occurs ON delays are limited to 10 seconds while OFF delays may be as long as 120 minutes Delays are useful in many applications to prevent nuisance alarms and unwanted cycling into and out of alarm conditions e Low Trip is set to either NO for increasing alarms or YES for decreasing alarms to determine if the alarm activates upon exceeding or falling below the set point e Latching determines either manual or automatic alarm reset operation YES requires a manual ALARM RESET to unlatch the alarm even though an alarm condition no longer exists YES also causes this alarm s common relay front panel LED and optional discrete relay to latch NO allows all outputs for this alarm to automatically reset after the alarm condition clears 4 3 3 Channel Configure Menu The Channel Configure menu allows setting the 7400 Plus Name and channel Eunit as 10 digit ASCII fields defines the measurement range of the ZERO and SPAN entries number of Decimal Points of reso
44. nnel s terminals for receiving analog inputs TB1 2 also provides A terminals connected to the 7400 Plus internal 24 VDC power supply for powering external transmitters Figure 2 6 shows proper wiring for both 2 wire and 3 wire transmitters 13 of 54 087 0041 Rev B 7400 Plus Instruction Manual COMMON SIGNAL S 2 Wire Transmitter Typical A 3 Wire Transmitter el Typical Figure 2 6 External Transmitter Wiring 2 1 3 2 Bridge Sensor Input Option The Quad Channel Bridge Sensor Input PCBA P N 093 0466 option may be installed in P1 of the motherboard Refer to Figure 2 7 14 of 54 087 0041 Rev B 7400 Plus Instruction Manual 4 20 mA 100 ohm Terminating Resistors TR1 Ch3 or TR2 Ch4 must be installed only when a transmitter is the input source R C AIR C AIR C AIR CAN Chan 1 Chan 2 mA mA Chan 3 Chan 4 R2 R12 R22 R32 R2 Ch1 R12 Ch2 R22 SH Ch3 and R32 Ch4 are the Sensor Balance Voltage Adjustment Pots le ld ad fed R3 R13 R23 R33 R3 Ch1 R13 Ch2 R23 Ch3 and R33 Ch 4 are the Sensor Balance BALI BAL BAL3 BAL4 Voltage Adjustment Pots JP1 JP2 JP3 JP4 JP1 Ch1 JP2 Ch2 JP3 Ch3 and JP4 Ch4 are Course Gain Jumpers that are set for the gain of the Bridge Amplifier JP5 JP6 JP5 Ch3 and JP6 Ch4 must be placed in the position of the the cat bead source either Sensor LEL or
45. on Port accepts 1 8 NPT Male fitting Removable Hex Si Socket Pipe Plug Il A Hose input Calibration Cup Regulator 1 Liter per Minute I for 103 Liter Tanks H input 7 Es Hose EE Regulator for 17 Liter Tanks SS Typical calibration equipment shown Sensor location and mounting may make optional equipment necessary such as flow meters copper tubing barbed inserts or tube fittings Calibration Gas Cylinder Consult an authorized service center or your Scott H amp S representative for help Figure 3 8 Typical Calibration Setup 36 of 54 087 0041 Rev B 7400 Plus Instruction Manual 3 7 1 Determining Span Gas to Use Typical calibrations are performed using methane gas as the Span Gas For accurate readings of other types of gas the Span Gas must match the gas to be measured However to calibrate a sensor for detection of other gases a surrogate gas propane can be used Appendix B details how to apply a K factor to the propane surrogate gas to obtain detection of other gas types 3 7 2 Sensor Calibration Procedure To perform a calibration from the 7200 Plus perform the following NOTE CAL MODE AUTOMATICALLY EXITS IF NO KEYS ARE ACTIVATED AFTER 5 MINUTES 1 To enter Cal Mode from any data display press the DOWN CAL key then use the UP DOWN keys to select the channel to calibrate 2 Apply Zero gas to the sensor to be calibrated with an appropriate Zero calibration standa
46. onfigurations AEN 26 3 3 1 Electrical Codes 26 3 3 2 Optional External POWer SUPpplY icciia 26 3 4 Evaluating Wire Length and Size i 27 3 5 Sensor Head Wiring riore 28 3 6 Cat Bead Sensor Initial Setup ee 29 3 7 CAIDO soi A A A 35 3 7 1 Determining Span Gas to Usel 37 3 7 2 Sensor Calibration Procedure Ae 37 A 40 iii 087 0041 Rev B ZI AFETY 7400 Plus Instruction Manual 4 1 Men ter 40 4 2 Data Display Gcreens ii 41 4 2 1 Engineering Unit Screen urea 41 4 2 2 Bar Graph Screen oi 41 4 2 3 ee E E 41 4 3 Channel Setup Men osoacpaantacnaaan aero 41 4 3 1 SU MEN e eE 42 4 3 2 Channel Setup Entry Menu 42 43 21 RU Me sins tddi 42 4 3 2 2 Alarm Men 43 4 3 3 Channel Configure MON sita cotas iaa ia 43 4 3 4 Cal Setup MENO scott 44 4 4 System Configuration Menus AAR 45 4 4 1 System Setup Meli 46 E br a t 46 4 4 1 2 Clock Delays Menu sur 46 4 4 1 3 Analog Setup EE 47 4 4 1 4 Horn Acknowledge Men 47 4 4 2 System Security Menu EE 47 4 4 3 HISION Login 48 5 RER 50 5 1 Parts EE 50 5 2 EES eege 50 Appendix MODBUS Register and Function Code Summary 52 iv 087 0041 Rev B 7400 Plus Instruction Manual Figure 2 1 Figure 2 2 Figure 2 3 Figure 2 4 Figure 2 5 Figure 2 6 Figure 2 7 Figure 2 8 Figure 2 9 Figure 2 10 Figure 2 11 Figure 2 12 Figure 3 1 Figure 3 2 Figure 3 3 Figure 3 4 Figure 3 5 Figure 3 6 Figure 3 7 Figure 3 8
47. rd Wait approximately five minutes or until readings are stable at the LCD display then press the EDIT key to perform the Zero calibration 3 If the Zero calibration is successful Cal Mode automatically proceeds to the Span check 4 Apply Span gas to the sensor to be calibrated that matches the selected value set in the Cal Setup Menu Wait approximately five minutes or until readings are stable at the LCD display then press the EDIT key to perform the Span calibration NOTE REFER TO PARAGRAPH 4 3 3 FOR INFORMATION ON SETTING OR VERIFYING THE SPAN GAS VALUE 5 If the Span calibration is successful the display flashes REMOVE CAL GAS and starts the Cal Delay 6 CAL MODE will be complete after the end of the CAL DELAY 37 of 54 087 0041 Rev B 7400 Plus SAFETY Instruction Manual From any Data Displa pay Optional Hold the UP key for 5 secs 30 1 to enter the Cal Mode Information Engralmits LEL CH4 Screen and view Offset Gain constants and A D live counts reading Oxygen rem CO live readin9 Eunits ea e 12 bit Counts xxxx CAL Span Value 50 0 Press CAL key Hee e eier SELECT CAL CHANNEL Sain 1 008 channel 2 NEXT Return to Cal Channel 3 Channel 4 Hold UP key for 5 secs Hold UP key for 5 secs Back to Data Display NEXT to Exit EDIT to Select AFF ly SUAL Press APP1Y ZVAL Select channel Eunits Press NEXT to exit Eunits NEXT press Edit live readin9 eunits live readin9 eunits to ex
48. t Bead Sensor Initial Setup Each channel must be configured to match the sensor with which it will operate This procedure must be performed at the time of install on each new bridge sensor 1 Prior to connecting remote sensors apply power to the system 2 Remove the 7200 Plus terminal cover WARNING LIVE VOLTAGE IS PRESENT TAKE APPROPRIATE ELECTRICAL SAFETY PRECAUTIONS TO PREVENT THE RISK OF ELECTRICAL SHOCK FAILURE TO DO SO COULD RESULT IN SERIOUS INJURY OF DEATH 3 Measure the voltage between each channel s A and R terminals and set the Voltage Adjust potentiometers for the correct sensor excitation voltage Noel Balk BAL2 BAL3 BAL4 Bie JP2 DU i de x 5al z og Adjust to 6 0V or 5 5V depending on which Sensor Head to be connected Figure 3 3 Sensor Voltage Adjustment 29 of 54 087 0041 Rev B Ze SCO TT 7400 Plus Instruction Manual CAUTION SENSORS MAY BE DAMAGED BY OVER VOLTAGE CONDITIONS SCOTT H S RECOMMEND THE VOLTAGE ADJUST POTENTIOMETER SCREWS BE COVERED BY A DOLLOP OF RTV OR SIMILAR MATERIAL AFTER COMPLETION OF THIS PROCEDURE OVERVOLTAGE MAY CAUSE DAMAGE TO SENSORS 4 Remove system power and connect sensor wires to the A C R terminals as shown in Figure 3 3 depending on system configuration 30 of 54 087 0041 Rev B 7400 Plus Ze SCOTT Instruction Manual RC A R C A Chan 1 Chan2 BALI BAL2 BAL3 BAL4 Ue He Urs cm og gi R Black BAL1 BALD gt G
49. the design content and specifications of the detector without notice 1 2 Certifications and Approvals UL1604 EN 61000 ISA 82 02 CSA C22 2 No 152 CSA C22 2 No EN 55011 1010 1 CSA C22 2 No 213 Div 2 Groups A B C D CSA File 219995 The 7400 Plus enclosure is rated for Class I Division 2 Groups A B C and D or non hazardous locations only 1 of 54 087 0041 Rev B SAFETY 7400 Plus Instruction Manual 1 3 Warnings Cautions and Notes Throughout this document warnings cautions and notes have been interspersed to draw attention to potentially unsafe hazardous or unique situations that require user attention Each warning caution or note is labeled and quickly identified using an icon WARNING INDICATES A POTENTIALLY HAZARDOUS SITUATION WHICH IF NOT AVOIDED COULD RESULT IN DEATH OR SERIOUS INJURY CAUTION INDICATES A POTENTIALLY HAZARDOUS SITUATION WHICH IF NOT AVOIDED MAY RESULT IN MINOR OR MODERATE INJURY IT MAY ALSO BE USED TO ALERT AGAINST UNSAFE PRACTICES NOTE HIGHLIGHTS VARIOUS INSTANCES WHERE AN ATTENTION TO DETAIL IS CRITICAL TO PRODUCT PERFORMANCE 1 3 1 General Warnings and Cautions The following list of warnings and cautions pertain to the general use and care of the 7400 Plus Failure to follow these warnings and cautions may result in death injury or poor equipment performance WARNINGS EQUIPMENT NOT USED AS PRESCRIBED WITHIN THIS MANUAL MAY IMPAIR OVERALL SAFETY
50. the monitoring system since it is inappropriate to calibrate a signal at more than one point Therefore if calibration will be performed at another transmitter or monitoring device the 7400 Plus Cal Mode feature should not be used Options available in the Cal Setup menu include e Zero Gas allows users to set the Zero Gas value e Span Gas allows users to set the Span Gas value e Set Unity Gain resets all calibration data making Cal Offset 0 and Cal Gain 1 44 of 54 087 0041 Rev B 7400 Plus Instruction Manual 4 4 System Configuration Menus Several system level options are available that effect the 7400 Plus and are not channel specific are shown in Figure 4 4 These include System Setup Security and History Log Engrg Unit Screen Bar Graph Screen Ch Trend Screen 38 1 25 30 1 EngrgUnits Chx 34 1 Pem CO keen WE EH EngraUnits LEL CH4 FAULT ALEL CH4 RI FL S 7 i ZA a 20 9 A Uxugen D fire Y Oxygen rem CO 73 1 EEN CO A2 AL ir ir Press EDIT to enter SETUP firmware rev hannel 1 Channel 2 Channel 3 Channel 4 System Security History System Menus Press EDIT to SYSTEM SETUP EDIT RELAY SETUP advance to next menu W Relay _ Standard Ort Relay Clock Delays m Fault Votes Remote Id BOI Alarm 1 Votes Press NEXT to go back to previous menu Press UP or DOWN to navigate cursor Analog Setur Horn Ac knowledge Track Negative NO Alarm 3 Votes Fai
51. ty and as a condition precedent to any duty of SCOTT the purchaser must return such products to SCOTT a SCOTT authorized agents or a SCOTT authorized service center Any product returned to SCOTT shall be sent to SCOTT HEALTH amp SAFETY Attn Warranty Claim Dept 4320 Goldmine Road Monroe NC 28111 This warranty does not apply to any malfunction of or damage to THE PRODUCTS resulting from accident alteration misuse or abuse THIS WARRANTY IS MADE IN LIEU OF ALL OTHER WARRANTIES EXPRESSED OR IMPLIED INCLUDING BUT NOT LIMITED TO ANY IMPLIED WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE IN ADDITION SCOTT EXPRESSLY DISCLAIMS ANY LIABILITY FOR SPECIAL INCIDENTAL OR CONSEQUENTIAL DAMAGES IN ANY WAY CONNECTED WITH THE SALE OR USE OF SCOTT PRODUCTS AND NO OTHER FIRM OR PERSON IS AUTHORIZED TO ASSUME ANY SUCH LIABILITY 1 5 1 Contacting Scott Health amp Safety To contact Scott Health amp Safety call fax email or write to Scott Health amp Safety 4320 Goldmine Road Monroe NC 28110 Website www scotthealthsafety com Phone 800 247 7257 FAX 704 291 8330 4 of 54 087 0041 Rev B 7400 Plus Ze SCO TT Instruction Manual 1 6 Acronyms Quick Reference Throughout the duration of this manual several acronyms are used Provided in Table 1 1 is a quick reference chart to quickly identify any acronym that may be unfamiliar to users Table 1 1 Acronym Quick Reference List
52. ual Table A 1 MODBUS Register and Function Code Summar Variable Code Alias Read Function Code Write Function CHAN3 FAULT BIT8 CHAN3 ALARM1 BIT9 CHAN3 ALARM2 BIT10 CHAN3 ALARM3 BIT11 CHAN4 FAULT BIT12 CHAN4 ALARM1 BIT13 CHAN4 ALARM2 BIT14 CHAN4 ALARM3 BIT15 LED Blink Status 31011 4 N A Bit set to 1 LED Blinking 0 LED steady On CHAN1 FAULT BITO CHAN1 ALARM1 BIT1 CHAN1 ALARM2 BIT2 CHAN1 ALARM3 BIT3 CHAN2 FAULT BIT4 CHAN2 ALARM1 BIT5 CHAN2 ALARM2 BIT6 CHAN2 ALARM3 BIT7 CHAN3 FAULT BIT8 CHAN3 ALARM1 BIT9 CHAN3 ALARM2 BIT10 CHAN3 ALARM3 BIT11 CHAN4 FAULT BIT12 CHAN4 ALARM1 BIT13 CHAN4 ALARM2 BIT14 CHAN4 ALARM3 BIT15 Relay Status 31012 4 N A Bit set to 1 LED Blinking 0 LED steady On STANDARD RELAY 1 STANDARD RELAY 2 OPTION RELAY 1 OPTION RELAY 2 OPTION RELAY 3 OPTION RELAY 4 OPTION RELAY 5 OPTION RELAY 6 BITO BITI BIT2 BITS BIT4 BITS BIT6 BIT7 55 of 54 087 0041 Rev B 7400 Plus Instruction Manual Table A 1 MODBUS Register and Function Code Summary Variable Code Alias Read Function Code Write Function INPUT FAULT RELAY BIT8 RESERVED BIT9 RESERVED BIT10 RESERVED BIT11 RESERVED BIT12 RESERVED BIT13 RESERVED BIT14 RESERVED BIT15 Memory Reals NOTE 41001 41040 REAL REPRESENTS FLOAT VALUE WITHOUT THE DECIMAL POINT SUCH THAT 123 4 IS RETURNED AS 1234 DECIMAL DIVISOR IS RETURNED AS 1 10 100 OR 1000 FOR DECIMAL POS
53. vent leakage Front View Side View 1 2 Clear Hole Conduit Entry Optional 226 57 mm Bottom View 892 Figure 3 1 Mounting Dimensions 24 of 54 087 0041 Rev B 7400 Plus Instruction Manual 3 2 1 Optional NEMA 7 Explosion Proof Enclosure The NEMA 7 wall mount enclosure is an optional aluminum case for mounting the 7400 Plus in potentially hazardous environments It is rated for DIV 1 amp 2 Groups B C D Refer to Figure 3 2 130 ea 330 2 mm 158 75 mm 14 25 8 0 361 95 mm 203 2 mm Front View Side View 9 87 250 7 mm Bottom View Figure 3 2 NEMA 7 Enclosure 25 of 54 087 0041 Rev B Ii SCOTT SAFETY 7400 Plus Instruction Manual 3 3 Electrical Configurations 3 3 1 Electrical Codes To meet prevailing electrical codes use conduit and all other materials required for electrical wiring in hazardous areas Install wiring according to National Electrical Code NEC Articles 501 517 WARNING NON METALLIC ENCLOSURES ARE NOT GROUNDED BY METAL CONDUIT TO GROUND INTERNAL COMPONENTS A PROPER EARTH GROUND MUST BE CONNECTED TO TB5 GND TERMINAL FAILURE TO DO SO CAN CAUSE ELECTRICAL GROUNDS AND DAMAGE ELECTRONIC COMPONENTS OR RISK OF ELECTRICAL SHOCK WARNING NON METALLIC ENCLOSURE DOES NOT PROVIDE GROUNDING BETWEEN CONDUIT CONNECTIONS USE GROUNDING TYPE BUSHINGS AND JUMPER WIRES ALL FIELD WIRING MUST HAVE I
54. y Open Normally Open lt K1 7 i K1 16 ro Upper Terminal Upper Terminal Block 1 Block ES Common 1 EH Common Lower Terminal i Lower Terminal Block 1 Block K1 8 i K1 17 Middle Terminal Middle Terminal Block 1 Block Normally Closed Normally Closed Figure 2 11 Discrete Relay PCB This optional PCB adds six 5 amp form C relays These optional relays are programmed using the Relay Setup Menu as described in Paragraph 4 4 1 1 Each relay can be programmed to activate based on any number of alarm conditions as defined by the operator using the alarm vote 2 1 6 MODBUS RS 232 RS 485 Interface Option The MODBUS option PCB P N 093 0438 adds both RS 232 and RS 485 MODBUS RTU slave ports NOTE FOLLOW CORRECT IEEE RS 232 AND RS 485 INSTALLATION GUIDELINES WHEN USING THE MODBUS INTERFACE OPTION Refer to Figure 2 10 19 of 54 087 0041 RevB SAFETY 7400 Plus Instruction Manual RS 232 Connector Schematic NC no connect S1 NC 1 gt TXD 2 gt RXD 3 gt GND 4 gt NC 5 gt 38 NC 6 gt RS 232 8 Shorted to 8 7 a 3 Shorted to 7 8 JP1 selects either RS 232 NC 9 gt a gt JP2 or RS 485 operation x e Im Resistor JP2 installs RS 485 terminating ep resistor end of cable only RS 485 E e RS 485 Terminal TB1 RS 485 terminations Schematic NC no connect EE Select S1 RS 232 terminations TB1 S w z A B 8 T RX B RS 485 Transceiver RS 232 Transceiver NC for shield continuation S sos q zg ge A 0010 120

Download Pdf Manuals

Related Search

Related Contents

Specifications  Manual do utilizador FLIR Reporter Professional  Princess 283069 ice cube maker  Descarga  User's Guide, N5181A/82A MXG Signal Generators  Manuel d`installation et d`utilisation  here - Security Camera Talk  Back paddock mobile user manual    Info über Trend Micro Endpoint Encryption  

Copyright © All rights reserved. Failed to retrieve file