Manual - Laurel Electronics, Inc.
Contents
1. 200 00 mV 2 0000 V 20 000 V 200 00 V 300 0V amp 600 0 V E WKN E m Ltb NH 2 0000 MEM 20 000 mA s 200 00 mA IT T 9 000 49 f e d C b a 5 ifn mV The flexible noise shield may be removed for jumper setting but must then be reinstalled Use 2 5 mm 0 1 jumpers Store spare jumpers on an unused jumper post 3 OKto remove the plug in shield for jumper setting but reinstall before closing the case To minimize noise pickup the input signal wiring should utilize a shielded twisted pair and the shield should be connected to signal low at the rms board as illustrated below If signal low is close to earth ground such as within 2V signal low can further be connected to earth ground Sig High RMS gnal source RR SigLow Board Shield around twisted pair Earth Ground Shielding for AC noise reduction 19 Example Transmit the digital reading in amps and as 4 20 mA from an AC current transformer Application Use a 200 5 200A in 5A out AC current transformer Digitally transmit the AC current reading in amps with 0 1A resolution Also transmit a 4 20 mA signal corresponding to Relay Alarms Communication Analog Out Signal Input Mode Range Custom Curve Rate 50 60 Hz Line Freq RMSA 5 0 Disabled DI Disabled 60 Hz e SE EC Relay Alarms Communicati Low In Low Read 00 000 000 C2. 34 20 CUSTOM ASCII PROTOCOL TRANSMITTER COMMUNICATIONS 39 21 LT SERIES ANALOG INPUT TRANSMITTER SPECIFICATIONS 44 225 secre ala San 48 3 PRODUCT OVERVIEW This manual covers LT Series DIN rail transmitters with isolated analog and RS232 RS485 outputs dual relays and an analog input signal conditioner A separate manual covers LTE Series DIN rail transmitters with isolated 4 20 mA and Ethernet outputs dual relays and an analog input signal conditioner LT Series transmitters duplicate the signal conditioning and signal processing features of their 1 8 DIN panel mounted digital panel meter counterparts for exceptional accuracy at high read rate A wide range of analog signal sources are accommodated by five analog signal conditioners e DC input for volts amps process signals eg 4 20 mA and strain gauges Most sensitive full scale input range of 200 mV Built in 5A current shunt e rms input for volts and amps Can be or DC coupled Built in 5A current shunt e Load cell or microvolt input with selectable full scale input ranges from 20 mV to 500 mV e Thermocouple temperature input for seven thermocouple types e RTD temperature or Ohms input for Pt100 Ni120 or Cu10 RTDs or 200 200 resistance A 4 20 mA 0 20 mA 0 10 or 10V to 10V isolated analog output
3. 20 000 V RMMA 200 00 V HMUS 600 0 V RMV6 300 0 V RMS Amperes RMM 2 0000 mA 2 20 000 200 00 mA 5 000 Range ETL certified to 300V Process amp Ratio Signals 4 20 mA 0 10V etc 4 20 mA in 4 20 mA out PI SI od Custom Scaling Specify min input and output max input and output Load Cell amp Strain Gauge 4 or 6 wire ratio Full scale ranges from 20 to 500 mV WMf 99 999 to 499 999 Specify min input and output max input amp output RTD Temperature Pt100 P385C 202 to 850 C Pt100 P385F 331 to 1562 F Pt100 P392C 202 to 850 C Pt100 P392F 331 to 1562 F Ni120 6726 80 to 260 C Ni120 672F 112 to 500 F Cu10 427C 97 to 260 C Cu10 427F 143 to 500 F Thermocouple Temperature JO eio 210 to 760 C 347 to 1400 F KEE 244 to 1372 C KE Sia andis 408 to 2501 F 257 10 400 i fl utei 430 to 752 F 240 1000 EE 400 to 1830 F NC 245 to 1300 C NE 410 to 2370 F ees 46 to 1768 C SE Sedan 51 to 3214 F 45 to 1768 C 49 to 3213 F Resistance 0 20 ohms Bd scii 0 200 ohms
4. 0 2 kohms BT soutenue 0 20 kohms 5 0 200 kohms R6 0 2 Mohms fixed range ACCESSORIES CBLO4 RS232 cable trans mitter to computer CBLO2 USB to DB9 adapter cable 2 TABLE OF CONTENTS t ORDERING GUIDE eurer ode ae 2 2 TABLE OR AU ME EE 3 3 PRODUC FOVERVIEW E danno item ce buceo ded d 4 4 RECEIVING amp UNPACKING YOUR TRANSMITTER 5 9 SARETY lr gl 5 TRANSMITTER FIELD WIRING egene 6 7 PROGRAMMING YOUR TRANSMITTER rat Pese 8 8 OPENING YOUR TRANSMITTER CASE niei pi 17 9 DC SIGNAL CONDITIONER BOARD dca i eei nettes 17 10 AC SIGNAL CONDITIONER BOARD p n e n tet eter bornes 19 11 LOAD CELL amp MICROVOLT SIGNAL CONDITIONER 21 12 THERMOCOUPLE SIGNAL CONDITIONER BOARD 23 13 RTD amp OHMS SIGNAL CONDITIONER BOARD een 25 14 MAIN BOARD JUMPER SET TTINGS uis cocta d epar d e ans 27 15 WUBI oO PAO ace erro ace 28 165 INPUT Ne E 31 17 lt TRANSMITTER CALIBRATION Ep o cep tal 32 18 GUSTOM CURVE EINEARIZATION cai doceo dint nete ut oett tee aed 33 19 MODBUS PROTOCOL TRANSMITTER
5. 0000 0 05 000 9200 0 0 Scaling Filter Analog Out lca egent Z 0 zm os 0 Solution Jumper signal conditioner for 5 000 A current range and AC coupling Under Input Display tab set Option Board to True RMS Mode to RMS A Range to 5 0A Decimal Point to dddd d and 50 60 Hz Line Freq to 60 Hz to reject 60 Hz noise Under Scaling tab if Coordinates is selected set High In to 5 000A and High Read to 200 0A For this application Coordinates is the easiest most intuitive scaling method Under Scaling tab if Scale Offset method is selected set Scale to 0 4 The reason is that a 5A full scale input corresponds to 5 000 input counts where each input count is 1 mA as for the 5A scale of a 4 digit meter These 5 000 input counts need to correspond to 2 000 output counts where each output count is 0 1A Under Analog Out tab set Range to 4 20 mA current Lo Range Reading to 0 0A and Hi Range Reading to 100 0 20 11 LOAD CELL amp MICROVOLT SIGNAL CONDITIONER BOARD The load cell signal conditioner board offers sensitivity to 20 mV full scale and 4 or 6 wire load cell connection This board needs to be configured via jumpers for the desired full scale voltage range All ranges are factory calibrated with calibration factors stored in EEPROM Instrument Setup Software recognizes the board and will bring up the appropriate menu
6. gt Click the Communication tab to view the communication parameters that you used to establish default communications with your transmitter You can reselect Baud Rate Device Address Serial Protocol and Full Half Duplex even though you may have selected different values to establish initial communications with your PC 12 Enter Decimal Value P jo oj Click on the Analog Out tab to scale your analog output which is standard Under Range select 0 20 mA current 4 20 mA current 0 10V voltage or 10V to 10V voltage Type in your Lo Range Reading and Hi Range reading These will create the two endpoints of your analog output range For detailed help on any data entry field select that field and press the F1 key 13 ADDITIONAL INSTRUMENT SETUP PROGRAM FEATURES e The Commands pull down menu allows you to execute certain functions by using your computer mouse This menu will be grayed out unless a Get Setup has been executed e The Readings pull down menu provides three formats to display input data on your PC monitor Use the Pause and Continue buttons to control the timing of data collection then press Printfor a hardcopy on your PC printer List presents the latest internal readings in a 20 row by 10 column table Press Pause at any time to freeze the display Press Printfor a hardcopy Plot generates a plot of internal readings vs time in seconds effectively turns the transmitte
7. Jumpers on main board PC using Instrument Setup software and serial cable Analog to Digital Conversion Conversion 60 sec at 60 Hz power 50 sec at 50 Hz power IRMA 16 bits 65 536 steps Analog Output standard BINA 4 20 mA 0 20 mA 0 10V 10V to 10V Compliance 2 DII E 10V 0 to 5000 load Compliance at EE 2 mA 5 load or higher Output FEIDER 16 bits 65 536 steps Output 0 02 of full span for DC inputs 0 196 for AC RMS inputs Serial 1 0 standard Serial formats ciini ee ditiis Hie dE RS232 or 5485 half or full duplex selectable Custom ASCII or Modbus or ASCII REI EE Detachable screw terminal plugs Transducer Excitation Output standard for DC process strain gauge load cell inputs Output E x 50 Vdc to meter ground Selectable levels 5 Vdc 5 100 mA 10 Vdc 5 120 mA 24 Vdc 5 50 mA Dual Relay Output standard Relay Two solid state relays SPST normally open Form A Gd AUG 120 mA 140 Vac or 180 Vdc Input Signal Noise Rejection G1 OOO E EE 250 5 BB EE 130 dB NMR at 50 60 EE 90 dB with no digital filtering
8. 42 General Reading and Writing Ram Memory Data RAM memory data is read and written as a continuous string of bytes consisting of 2 hex characters 0 9 A F per byte Included in the command are the total number of bytes to be transferred and the most significant address in RAM of the continuous string of bytes The format is Read lower RAM data 1Gnaa Write lower RAM data 1Fnaa lt data gt Read upper RAM data 1 Write upper RAM data 1 naa data where n is the number of bytes to be read or written aa is the most significant address in RAM of the bytes to be read or written data is n bytes of 2 hex characters per byte in order from the most to the least significant byte The number of bytes n consists of a single code character representing values from 1 to 30 as shown above under CHARACTER 4 The most significant address aa consists of 2 hex charac ters as shown below under RAM MEMORY ADDRESSES AND DATA DEFINITIONS General Reading and Writing Nonvolatile Memory Data Nonvolatile data is read and written as a continuous string of words consisting of 2 bytes or 4 hex characters 0 9 A F per word Included in the command is the total number of words to be transferred and the most significant address in nonvolatile memory of the continuous string of words The format is Read nonvolatile memory data 1Xnaa followed by Meter reset Write non volatile memory data 1Wnaa data followed by Meter reset where
9. bei 2 3 or 4 wire band ple Er aD he aa n 0 00396 of reading C Zero ten DEO tds Dodd delest Geet te cid 0 03 deg deg Sensor lead resistance tempco per conductor 2 wire 10 udeg deg up to 10 Q Sensor lead resistance tempco per conductor amp 4 wire 10 udeg deg up to 100 Q Over voltage protection cesa sei a tl Cuban e ra tb Eel slave 125 Vac Open sensor indication 0 mA or 20 mA output jumper selectable Thermocouple Input 1 or 0 1 resolution Selection of signal ranges amp temperature sensors Via jumpers and software Selection of serial format excitation output analog output Via jumpers on main board PC using Instrument Setup software and serial cable Input resistance EE 160 Overall input 0 01 of full span 2 counts Max Rue 1 max for rated accuracy done e s pac 0 00396 of reading C Reference junction tempco cc2sccscssccsecssesscssesssssseseesesssseseesesssseseesesssseseeseseeees 0 02 deg deg Over voltage protection rivi e o coat itn du t v aria cot n rH DES Fe n Ur Rn 125 Vac Open sensor indication 0 mA or gt 20 mA output jumper selectable Conf
10. 0 20 000 kQ N A 0 200 00 kQ 0 2 0000 MQ Connection for RTD or Resistance E2 Jumper 2 or 4 wire none 3 wire 0 1 Use 2 5 mm 0 1 jumpers 2 Store spare jumpers on an unused jumper post RTD and resistance measurement allow 2 3 or 4 wire hookup to compensate for lead wire resistance Please see Section 6 for hookup diagrams e In 2 wire hookup the transmitter senses the voltage drop across the load and both lead wires The effect of the lead wires can be measured and subtracted by shorting out the load during transmitter setup as prompted by Instrument Setup software The short should be as close as possible to the load Ambient temperature changes will still cause some error in the readings the higher the lead resistance the greater the error e In 3 wire hookup the transmitter automatically compensates for lead resistance by mea suring the voltage drop in one current carrying lead and assuming that the voltage drop in the other current carrying lead is the same e In 4 wire hookup there is no lead wire resistance error as different pairs of wires are used for excitation and sensing The sense wires only carry a few picoamperes and hence can measure the voltage across the RTD without error 25 Example Control incubator temperature alarm over temperatures record chart recorder Application Using an ANSI Platinum RTD as the sensor control a heater to maintain the tem perature of an incubator at 9
11. 0 0 zoma curent X 9299 5 0 Solution e Jumper signal conditioner for 200 00 mV range e Under Input Display tab set Option Board to DC Mode to DC V Range to 0 2 Decimal Point to dddd d and 50 60 Hz Line Freq to 60 Hz to reject 60 Hz noise e Under Scaling tab if Coordinates is selected set High In to 0 1V and High Read to 500 0A For this application Coordinates is the easiest most intuitive scaling method e Under Scaling tab if Scale Offset method is selected set Scale to 0 5 The reason is that a 200 mV full scale input corresponds to 20 000 input counts where each input count is 10 uV as for the 200 mV scale of a 4 digit meter These 20 000 input counts need to correspond to 10 000 output counts where each output count is 0 1A e Under Analog Out tab set Range to 4 20 mA current Lo Range Reading to 0 0A and Hi Range Reading to 200 0A 18 10 RMS SIGNAL CONDITIONER BOARD Five RMS voltage and four RMS current ranges are jumper selectable as is AC DC coupling All signal ranges are factory calibrated with calibration factors stored in EEPROM on the signal condi tioner board Instrument Setup Software recognizes the board and brings up the appropriate menu items for it however it does not recognize the jumper settings Ranges also have to be entered manually Board Revision S Voltage Ranges
12. 2 Improper or inadequate maintenance 3 Unauthorized modification or misuse 4 Operation outside the environmental specifications 5 Mishandling or abuse The warranty set forth above is exclusive and no other warranty whether written or oral is expressed or implied Laurel specifically disclaims implied warranties of merchantability and fitness for a particular purpose Any electronic product may fail or malfunction over time To minimize risks associated with reliance on Laurel products users are expected to provide adequate system level design and operating safeguards Laurel s products are intended for general purpose industrial or laboratory use They are not intended nor certified for use in life critical medical nuclear or aerospace applications or for use in hazardous locations EXCLUSIVE REMEDIES The remedies provided herein are Buyer s sole and exclusive remedies In no event shall Laurel be liable for direct indirect incidental or consequential damages including loss of profits whether based on contract tort or any other legal theory Copyright 2009 2015 Laurel Electronics Inc Rev 15 December 2015 48
13. 5th digit is et to 0 the termination characters appear only once at the end of the string In either case if included the coded character appears at the end of the last value only 3 0 NETWORK CONFIGURATIONS Using the Custom ASCII protocol TM Series transmitters can operate in a point to point mode using RS232 15485 or in a multi point mode using 25485 The point to point mode is a direct connection between a computer or other digital device and the transmitter Any device address can be selected however it is suggested that address 1 be selected as a standard for the point to point mode The multi point mode is a connection from a host computer to a multiplicity of transmitters bused together with their inputs and outputs connected in parallel For long cable runs the last device should have a termination resistor installed It is necessary to set up each device on the bus with a different address from 1 to 31 To command a particular device its address is used in conjunction with the command and only that device responds The outputs of all of the devices on the bus are set to a high impedance state except the device being addressed The device addresses range from 1 to 31 with 0 being a special address to which a meter responds only internally e g Reset but does not transmit any response on the output lines devices may be commanded simultaneously with a 0 address and there will not be any output response contention
14. Jumpers Excitation Output Jumpers 5V 100 mA 4 Current 4 20 mA 1 Lo 2 Hi Voltage 0 10V 1 Lo 2 Hi Voltage 10V to 10V 3L0 2Hi Jumper settings are for main board Rev L 10V 120 mA 4 b 24V 50 mA b E4 none Attempting to draw more than the rated excitation output current will shut down the output 15 DUAL RELAY OPERATION Dual AC DC solid state relays rated 120 mA are standard for alarm or setpoint control and are independently set up via the Relay Alarms tab of Instrument Setup Software For online help with any data entry field press the F1 key d Analog Out Input Display Scaling Filter Relay Alarms Communication Alarms 1 2 No Rdgs to Alarm 4 Readings hd e Setpoint The number to which the current reading is compared if deviation is set to zero The reading is the count in engineering units that is transmitted digitally and is also used for analog output For example if the transmitted reading is in gallons minute the setpoint will be referenced to that reading not to the raw pulse rate sent from a turbine flow meter a x P 2 D Active High On Off setpoint control Active Low On Off setpoint control With deviation lt 0 With deviation 0 28 Deviation A positive number that can be added subtracted from the setpoint depending the Deviati
15. L puit Programmable digital time constants from 80 ms to 9 6 s Overvoltage Protection Voltage input ranges of 2V and above or DC 600 Vrms Voltage input ranges of 200 mV AC or DC load cell thermocouple RTD 100 Vrms DC Volts DC Amps Process and DC Ratio Input 200 00 mV 2 0000 V 0 01 of full scale 20 000 V 2 counts 200 00 V 300 0 V amp 600 0 V 10 MO 2 0000 mA 20 000 mA SC 200 00 mA True RMS Volts amp Amps 200 00 mV 2 0000 V 0 1 of full scale 20 000 V 2 counts 200 00 V 2 0000 mA 0 000 mA 200 00 mA 0 196 of full scale 2 counts D OU DH EE AC or AC DC jumper selectable AC Frequency Range 10 Hz to 10 kHz crest factor to 3 0 600V ranges are only ETL certified to 300V 45 Load Cell Strain Gauge amp Microvolt Input 20 000 mV 250 000 mV o 100 00 mV 160 250 00 500 00 RTD Input 1 0 1 0 01 resolution Type Conformity Error Platinum Pt100 MERO 202 to 850 C 0 03 C 00385 DIN H 331 to 1562 F 0 05 F Platinum Pt100 SE 202 to 631 C 0 04 C 003925 ANSI H 331 to 1168 F 0 07 F Nickel Ni120 e 80 C to 260 C 0 05 C a 00672 H 112 F to 500 F 0 09 F Copper Cu10 50 mA 97 C to 260 C 0 05 C a 00427 1439 to 500 F 0 09 F SAADEN LECA OII datei istis ut disti
16. Read and High In High Read data points are entered numerically and 3 Reading Coordinates of 2 points method which uses actual readings Input Display Scaling Filter Relay Alarms Time Constant Threshold Peak Valley Value Automatic DI Adaptive DI Filtered Click on the Filter tab to set to set up filtering for your readings The filter time constant can be automatic be specified in seconds or be turned off The adaptive threshold modifies the time constant in response to noise A low adaptive threshold is recommended for normal low noise A high adaptive threshold is recommended for high noise environments 1 Input Display Scaling Filter Relay Alarms Communication Analog Alarm 1 Alarm 2 Setpoint 1 Setpoint 2 Deviation 2 E eviation 1 000000 Ei Click on the Relay Alarms tab to set up your transmitter s two solid state relays which standard For detailed help on any data entry field under select that field and press the F1 key Input Display Scaling Filter Relay Alarms i Analog Out Serial Communications Baud Rate Address Ouiput Items Ouiput Filter Ouiput Rate 9600 alll 1 D Item 1 Unfiltered dl Read Rate J Ouiput Mode Alarm Data CRF Full Half Duplex D LF st End of A Di Full Duplex Serial Protocol Recognition Char Transmission Chars s zl Special
17. adaptive feature is disabled and the Time Constant does not change e Threshold allows selection of Low Adaptive or High Adaptive for the Adaptive filter selection Normally select Low Select High if the signal has large spurious transients which should not be considered as an actual change in signal e Peak Valley Filter allows the peak maximum or valley minimum functions to be based on Unfiltered or Filtered readings Normally select Unfiltered Select Filtered if you expect spurious readings which you do not wish to capture 31 17 TRANSMITTER CALIBRATION analog input and analog output ranges of the transmitter have been digitally calibrated at the factory prior to shipment using calibration equipment certified to NIST standards Calibration constants are stored digitally in non volatile memory in EEPROM on the signal conditioner board and main board This allows signal conditioner boards to be changed without requiring transmitter recalibration If periodic recalibration is required the transmitter may be returned to the factory or to any authorized distributor A modest fee will apply which also covers a Calibration Certificate DC load cell AC RMS and thermocouple signal conditioner boards can be calibrated using Instrument Setup Software running on a host PC which is connected to the transmitter via 5232 RS485 The Calibration screen of Instrument Setup Software is accessed by clicking on Calibration at the to
18. first character is always a plus or minus sign A decimal point is always furnished even when it follows the last digit Adding a Line Feed Character to the Basic Format Printers and other devices that receive the data may require a line feed character LF following the CR The line feed character LF may be selected using Instrument Setup software Adding a Coded Data Character to the Basic Format A coded character from A to H may be added to the data string according to the table below to indicate the alarm and overload status of the device If used this character precedes the CR so that it is the last printable character in the string With the optional LF and coded character selected the data string will consist of 10 characters for analog input DPM transmitters such as 999 99A lt CR gt lt LF gt Neither Alarm set Alarm 1 set only B F Alarm 2 set only C G Both Alarms set D H For example a coded character G indicates that Alarm 2 only is set and that the transmitter is in the overload condition This information is useful when data is supplied to a computer for listing and analysis or when data is supplied to a Remote Display in a Master Slave confi guration 39 Values are transmitted in a continuous string with no intervening spaces If the 5th digit in is set to 1 using Instrument Setup software the termination characters of CR and optional lt LF gt appear after each value If the
19. is standard This output is generated by an ultra linear 16 bit digital to analog converter which tracks an internal linearized digital reading Isolated serial communications are standard The transmitter serial port is default jumpered for RS232 or full duplex RS485 same jumper settings Half duplex RS485 is also selectable either via internal or external jumpers Three serial protocols are software selectable Modbus RTU Modbus ASCII and Custom ASCII Modbus allows devices by different manufacturers to be addressed on the same data line The simpler Custom ASCII protocol is recommended when there are no devices by other manufacturers on the data line An isolated transducer excitation output is standard in DC process and load cell input models Three output levels are jumper selectable 5V at 100 mA 10V at 120 mA or 24V at 50 mA The factory default setting is 10V and can power up to four 350 ohm load cells in parallel Two isolated solid state relays are standard These are rated 120 mA at 140 Vac or 180 Vdc Isolation to 250V rms is provided for power signal input analog output relay outputs and com munications Isolation adds safety and avoids possible ground loops The transducer excitation output is isolated to 50V from signal ground Internal jumpers are used to select the signal range analog output type communication type and excitation level The transmitter configuration is specified by the model number on the transmitt
20. items for it however it does not recognize the jumper settings The ranges also have to be selected in Instrument Setup software The excitation output can be set to 5V 100 mA 10V 120 mA or 24V Q 50 mA via main board jumper settings Please see Section 14 of this manual Operation is ratiometric with automatic compensation for changes in excitation voltage For DC microvolt applications a scale factor of 1 and an offset of 0 are used for direct read ings in microvolts or millivolts Decimal point selection does not affect the displayed digits For example 20 mV can be transmitted as 20 000 mV or 20000 uV The decimal point is set separately For load cell applications three scaling methods can be selected in Instrument Setup Software 1 Scale and offset 2 Coordinates of 2 points and 3 Reading coordinates of 2 points which uses actual signals Only menu items applicable to the selected scaling method will be presented Load Cell amp Microvolt Ranges 20 000 mV 50 000 mV 50000 100 00 mV 10000 TT 250 00 mV 25000 500 00 mV 50000 il 1 Use 2 5 mm 0 1 jumpers 2 Store spare jumpers on an unused jumper post Divs Example Transmit weight in decimal tons and as 4 20 mA with overweight alarming Application Digitally transmit weight in metric tons with 3 decimal places using a 3 mV V load cell Also output weight from 0 to 5 000 tons as a 0 10V signal Apply 10V excitation At a load of 5 000 tons t
21. not captive and are black Take precautions so that the nuts do not get lost 16 9 DC SIGNAL CONDITIONER BOARD DC PROCESS RATIO The DC volts DC amps and process transmitters utilize the DC signal conditioner board which needs to be configured via jumpers for the desired voltage or current range All signal ranges are factory calibrated with calibration factors stored in EEPROM on the signal conditioner board Instrument Setup Software recognizes the board and brings up the appropriate menu items for it however it does not recognize the jumper settings Ranges also have to be selected manually The excitation output can be set to 5V 100 mA 10V 120 mA or 24V 50 mA via main board jumper settings Please see Section 14 of this manual Board Revisions Q and R Voltage Ranges Jumpers 200 00 mV 2 0000 20 000 V 200 00 V 300 UL 600V ETL on C Current Ranges Jumpers e g b 2 0000 mA A 20 000 mA 200 00 mA 5 000 A 1 Use 5 mm 0 2 jumpers for locations designated by a capital letter 2 Use 2 5 mm 0 1 jumpers for locations E2 and designated by a lower case letter 3 Store spare jumpers on an unused jumper post not associated with a capital letter For DC voltage and DC current transmitters a scale factor of 1 and an offset of 0 are used for readings in volts or amperes Decimal point selection is indep
22. 9 0 0 5 F Use 4 wire connection Output temperature to an analog chart recorder so that 95 F and 10V 105 F Alarm temperatures of 102 F or higher Custom Curve Disabled 7 0099 0 iation 1 0000 5 Solution Jumper signal conditioner for Pt100 and 2 or 4 wire connection Under Input Display tab set Mode to RTD Range to ANSI deg F Resolution to 0 1 deg and 50 60 Hz Line Freq to 60 Hz to reject 60 Hz noise Under Relay Alarms tab select Split Hysteresis with a setpoint of 99 0 F and a deviation of 0 5 F for Alarm 1 which will control the heater Select a setpoint of 102 0 F for Alarm 2 which will be used to alarm over temperatures Under Analog Out tab set Range to 0 10V Voltage Lo Range Reading to 95 0 F and Hi Range Reading to 105 0 F 26 14 MAIN BOARD JUMPER SETTINGS ede E6 ecebeam maebe edece Serial Signal Duplex Jumpers Termination Resistor EG Transmit 6 c Receive RS485 The termination resistor jumper settings should only be selected if the transmitter is the last device on an R8485 line longer than 200 feet 60 m Or connect external BTX to BRX and ATX to ARX same effect as internal jumpers To reset communications to 9600 baud command mode Custom ASCII protocol and Address 1 place a jumper at E1 and power up the transmitter Analog Output JAPins
23. Addressing of transmitters can be set with Instrument Setup software 4 0 COMMAND MODE OVERVIEW Using the Custom ASCII protocol TM Series transmitters operate in the Command Mode only In this mode the device does not send data automatically but responds to commands received from a host computer These commands can be e To transmit the latest or peak measurement e Toreset the meter completely or just the peak value and or latched alarms e To display a value sent from the computer To transmit present setup parameters e new setup parameters e monitor or alter data in selected memory locations of the meter 5 0 COMMAND MODE FORMAT CHAR 1 Command Identifier All commands begin with followed by the meter address then a command letter followed by sub command number or letter Additional characters may be append ed All commands terminate with CR lt LF gt ignored 40 mer eme Command Identifier Recognition Character Device Address 0 addresses all devices 1 V specific devices Command Function Sub command Number of Bytes of RAM or Words 2 Bytes of non volatile memory data being transferred CHAR 2 Address Codes A Serial Communications Address Code from 1 to V follows the to indicate the device address number from 1 to 31 Address E Address Address mE 1 2 3 4 5 6 7 8 9 eme RE eech CHARS amp 4
24. Commands and Subcommands The examples below use a default address of 1 following the Substitute the desired address from the above table of Serial Comm Address Codes All command sequences shown must terminate with CR followed by an optional lt LF gt Request DPM Values Get reading 1B1 Peak reading 1B2 Valley reading 1B3 The meter transmits the value or values selected with Instrument Setup software Reset Functions DPM Transmitter Cold reset 1C0 Reads NVMEM into RAM locations after RAM is zeroed Latched alarms reset 1C2 41 Peak value reset 103 Remote display reset 1C4 Valley reset 169 function 1CA Tare reset 1CB 6 0 READING AND WRITING TO RAM AND NONVOLATILE MEMORY CHAR 1 2 The Recognition character and Meter Address Code are the same as shown in previous table CHAR 3 Command character Read bytes from RAM Memory Write bytes to RAM Memory DPM and Scale meter only Read bytes from Upper RAM Memory Write bytes to Upper RAM Memory Read words from Non Volatile Memory Write words to Non Volatile Memory CHAR 4 Command character Sub command Number of Bytes of RAM or Words 2 Bytes of non volatile memory data being transferred e ze Hm HE 1 1 2 2 3 3 D 4 4 E 9 9 F 6 6 G 7 8 8 9 9 10 CHAR 5 6 See tables the RAM MEMORY ADDRESSES and NONVOLATILE MEMORY ADDRESSES with their respective data definitions
25. DC 6 6 5 RX 5 ARX 4 NC 4 ATX 3 GND 3 GND 2 BRX 2 BRX 1 N C DB9 connector 1 BTX to PC Transmitter rear view Transmitter Master RS232 wiring RS485 wiring full duplex 6 6 5 ARX ATX ATX ARX 5 ATX ARX 214 4 3 GND GND 3 GND 2 BRX BTX BTX 2 BTX 2 1 1 Transmitter Master Transmitter Master RS485 wiring half duplex RS485 wiring half duplex with internal jumpers with external jumpers P6 SIGNAL INPUT DETAIL DC amp Externally Powered Process Load Cell Excitation 1 Excitation 1 Excitation 2 Sense 2 Signal input 3 1 Signal 3 Signal input 4 Signal 4 Excitation 5 2 Wire Process Transmitter Sense 6 Excitation 1 For 4 wire load cell connection jumper Excitation 2 __ m Pin1 to Pin 2 and Pin 5 to Pin 6 Signal input 4 RTD or Resistance 2 Wire Excitation 1 DC Ratio Excitation 2 Bridge Potentiometer _ Signal input 3 Excitation 1 Signal input 4 Excitation 2 H Signal input 3 Signal input 4 RTD or Resistance 3 Wire Excitati 1 AC amp AC DC True RMS AE P ane Voltage Signal In 1 2 20 200 600V Signal input 3 NC 2 Signal input 4 Signal Return 3 GR neutral Current or Low 4 2 20 200 mA E Voltage Signal In 5A 0 2VA RTD or Resistance 4 Wire Thermocouple Excitation 1 Excitation 2 NC 1 Signal input 3 NC 2 Signal input 4 Signal input 3 Signal input 4 P4 ANA
26. LOG OUTPUT DETAIL EN Unipolar Output 0 10V 4 20 mA Analog return 1 Analog output 2 Lo D Bipolar Output 10 to 10 110 SN 5 2 Mount transmitters with ventilation holes at g outp and bottom Leave minimum of 6 mm 1 4 500 Ohms max load for 4 20 mA between transmitters or force air with a fan 5 kOhms min for 0 10V or 10V to 10V En 7 PROGRAMMING YOUR TRANSMITTER Our transmitters are easily programmed using a PC and Instrument Setup IS Software which runs under MS Windows and provides a graphical user interface This software allows uploading editing downloading and saving of setup data execution of commands under computer control listing plotting and graphing of data and computer prompted calibration USING INSTRUMENT SETUP SOFTWARE As a first step set User Account Control UAC of your version of Windows to Never notify so that Instrument Setup Software can create directories Use Google for instructions RS232 cable with rear view of DB9 connector to PC Use a 3 wire RS232 cable P N 04 to connect your transmitter to the port of your PC Download the file ISx x x exe from our website and double click on the file name Click on Install Instrument Setup Software and follow the prompts To launch 15 software press on Start gt Programs gt 152 gt Instrument Setup or on the desktop shortcut that you may have created Following a brief s
27. LT SERIES TRANSMITTERS ANALOG INPUT 4 20 MA OUTPUT amp RS232 RS485 UO USER MANUAL Ip Intertek L LAUREL Electronics Inc 4006497 3183 G Airway Ave Costa Mesa CA 92626 USA Tel 714 434 6131 e Fax 714 434 3766 e Website www laurels com 1 ORDERING GUIDE Configure a model number in this format LT20DCV1 CBL04 Transmitter Type LT 4 20 mA 0 20 mA 0 10V or 10V to 10V isolated analog output isolated RS232 RS485 serial data output two 120 mA solid state relays and isolated transducer excitation output LTE 4 20 0 20 mA 0 10V or 10V to 10V isolated analog output isolated Ethernet output two 120 mA solid state relays and isolated transducer excita tion output Main Board 2 Standard main board KE eee Extended main board Note Extended main board adds rate of change and custom curve linearization Not applic able to temperature E Power 0 85 264 Vac or 90 300 Vdc 12 32 10 48 2 Power over Ethernet LTE Input Type DC Volts DEV nnn 200 00 mV 2 2 0000 V DUM S oec pes 20 000 V 200 00 V US so emere 600 0 V DOV ots 300 0 V DC Amperes oam 2 0000 mA DUM us oe 20 000 mA sio aseo 200 00 mA 5 000 A RMS Volts 1 200 00 RMV2 2 0000 V RMV3
28. NGE JUMPERS Your transmitter case does not need to be opened if jumpers have already been set by your distributor Otherwise you will need to open the case and either set jumpers or verify that the factory default jumpers positions will meet your needs Note that while Instrument Setup Software senses the circuit board type it does not sense jumper settings and the correspond ing information has to be entered manually Jumpers are used for the following 1 On the signal conditioner board to set the signal type e g voltage or current and the range For details please see the next five sections of this manual Note that all ranges of all signal conditioner boards are factory calibrated with calibration factors stored in EPROM on the board 2 main board to set the serial communication signal RS232 RS485 termination resistor for long cable runs analog output signal current or voltage and sensor excita tion output 5V 10V or 24V Default factory settings are current output RS232 no termination resistor and 10V excitation HOW TO OPEN amp CLOSE THE CASE The two clamshell halves of the case are held together with a bolt and a nut at each of the four corners Use a Phillips screwdriver to remove the four bolts The nut will then drop off and the clamshell halves will separate When closing the case make sure that the ventilation grills are properly aligned Caution The nuts at each corner are
29. Request NoTx EN I RA NR NR CL CH 03 Response NoTx MA FC NB DD DD CL CH 04 Request NoTx RA RA CL CH 04 Response NoTx FC NB DD DD CL CH 05 Request NoTx FC WW WW CL CH 05 Response NoTx FC WW WW CL CH 08 Request NoTx MA FC SF SF WW WW CL CH 08 Response NoTx MA SF SF DD DD CL CH 10 Request NoTx FC RA RA NB DD DD CL CH 10 Response NoTx FC RA CL CH Exception NoTx MA FC EC CL CH Response 80 DD DD times NR Number of Registers Modbus ASCII Format Byte s 03 Request ERES ES NR LRC CR LF 03 Response FC NB DD DD LRC CR LF Request RA RA NR LRC CR LF y Response FC DD DD LRC CR LF 05 Request RA WW WW LRC CR LF 05 Response RA WW WW LRC LF 08 Request FC SF SF WW WW LRC CR LF 08 Response FC SF SF DD DD LRC CR LF 10 Request MA FC RA RA NB DD DD LRC CR LF 10 Response MA FC RA RA LRC CR LF Exception MA FC EC LRC CR LF Response 80 DD DD times NR Number of Registers 8 0 MESSAGE EXAMPLES All examples are for Transmitter Address 01 and No Parity Modbus RTU Modbus ASCII Ser 4
30. d e avoid dangers of electrocution and or short circuit do not attempt to open the case while the unit is under power e o prevent an electrical or fire hazard do not expose the transmitter to excessive moisture Do not operate the transmitter in the presence of flammable gases or fumes as such an environment constitutes an explosion hazard Symbols applicable to this product N Caution refer to accompanying documents il Earth ground terminal Caution risk of electric shock Both direct and alternating current E Equipment protected throughout by double ETL Mark Indicates that product insulation or reinforced insulation EE UL Std 61010 1 and is CE Mark Indicates that product meets ONL EU safety health and environmental pahaa Et to CAN USA Std 022 2 No requirements Operating environment Transmitter Class II double insulated equipment designed for use in Pollution degree 2 c 6 TRANSMITTER FIELD WIRING 1 See manual 2 P6 Signal SORS 3 D See section 14 for main signal types excitation g yp output UT board for jumper settings 6 Control input 2 1 5485 RS232 Control input 1 2 P5 Control 6 TX GND 3 inputs 1 amp 2 e Ge Analog ret 0 10V 4 20 mA 1 P2 Serial 3 GND GND a 2 GND Analog return 10V to 10 3 SRA js NC AL2 1 AL2 2 P3 Solid 3 Power GND AL1 3 staterelays O 2 AC neutral or DC AL1 4 1 AC high or
31. d and will bring up the appropriate menu items for it however it does not recognize jumper settings so the thermocouple type also has to be selected in Instrument Setup Software A large number of additional items are selectable in Instrument Setup Software For help with any item highlight that item and press the F1 key Note that Decimal Point choices are offered for 1 0 1 or 0 01 resolution The 0 01 choice is not recommended for thermocouples Offset adjustment is available under the Scaling tab and is normally set to 0000 0 If is selected entering an offset of 0273 2 will change the display to Kelvin If F is selected entering an offset of 0459 7 will change the display to Rankin PNP transistor Board Revision Thermocouple Type E4 Jumper J K E T R S Open T C Indication E3 Jumper Upscale Downscale 1 Use 2 5 mm 0 1 jumpers 2 Store spare jumpers on an unused jumper post 96720 Example Transmit temperature control a chiller and provide over temperature alarm Application Transmit temperature of a fermentation tank as a 4 20 mA signal from 15 C to 35 C Turn on a chiller when the temperature reaches 28 C Turn off the chiller when the tem perature is below 24 Alarm temperatures over 30 The sensor is a Type K thermocouple Custom Curve Disabled y Solution Jumper signal conditioner for Type K thermocouple Under Input Display tab
32. ding The Alarm readings counter then resets to 0 30 16 INPUT SIGNAL FILTERING The Filter tab provides selections to minimize the effect time jitter and electrical noise which can affect trigger points In most cases filtering is only available for Item 1 and is grayed out for totalizing and stopwatch functions Input Display Scaling 1 Filter Relay Alarms Communication Analog Out 1 Time Constant Type Threshold Peak Valley Filter 1 6 D Adaptive Low Adaptive D Filtered e Time Constant provides moving average filter with the following eight equivalent RC time constants no filter 0 1 sec 0 2 sec 0 4 sec 0 8 sec 1 6 sec 3 2 sec and 6 4 sec The longer time constants provide superior noise filtering at the expense of fast response time Note that filtering can also be accomplished by lengthening the Gate time under the Input Display tab e Type allows selection of Adaptive or Conventional filtering With Adaptive the time constant is changed dynamically so that the transmitter can respond rapidly to actual changes in signal while filtering out random noise The moving average filter is reset to the latest reading when the accumulated difference between individual readings and the filtered reading exceeds a Threshold The accumulated difference is also reset to zero when the latest reading has a different polarity than the filtered reading With Conventional filtering the
33. e 34 4 0 COMMUNICATIONS SETUP Parameters selectable via downloaded Instrument Setup software Serial Protocol Custom ASCII Modbus RTU Modbus ASCII Modbus ASCII Gap Timeout 1 sec 3 sec 5 sec 10 sec Baud 300 600 1200 2400 4800 9600 19200 E No parity odd parity even parity Device Address 0 to 247 9 0 SUPPORTED FUNCTION CODES FC03 Read Holding Registers Reads internal registers containing setup parameters Scale Offset Setpoints etc FC10 Write Multiple Registers FC10 16 dec Writes internal registers containing setup parameters Scale Offset Setpoints etc 2004 Read Input Registers Reads measurement values and alarm status Returns values in 2 s Complement Binary Hex format without a decimal point The displayed system decimal point can be read with at address 0057 Use only odd Register Addresses and an even number of Registers Register Address TM Transmitter Response Returns Hi word of Alarm status Returns Lo word of Alarm status Returns Hi word of Measurement value Returns Lo word of Measurement value Returns Hi word of Peak value Returns Lo word of Peak value Returns Hi word of Valley value Returns Lo word of Valley value FC05 Write Single Coil Action command to meter Output Address Output Value Action Command FF 00 Transmitter Reset No Respon
34. e Addressed Slave or that would have been returned if Count nota broadcast message or if the Slave was not in a Listen Only mode 00 OE 00 00 Slave Returns total number of messages either broadcast Message j addressed to the Slave Excludes bad LRC CRC parity or Count length 3 errors 00 OF 00 00 No Returns total number of messages either broadcast or Response addressed to the Slave for which Slave has returned No Count Response neither a normal response nor an exception response Excludes bad LRC CRC parity or length 3 errors 00 11 00 00 Slave Returns total number of Exception Code 6 Slave Busy Busy responses 6 0 SUPPORTED EXCEPTION RESPONSE CODES Code Name Error Description 01 Illegal Function Illegal Function Code for this Slave Only hex Function Codes 03 04 05 08 10 dec 16 are allowed 02 Illegal Data Address Illegal Register Address for this Slave 03 Illegal Data Value Illegal data value or data length for the Modbus protocol 04 Slave Device Failure Slave device failure eg Transmitter set for external gate 7 0 MESSAGE FORMATTING MA Meter Address DD Data Hex CL Lo Byte FC Function Code WW Data On Off CH CRC Hi Byte RA Register Address SF Sub Function CR Carriage Return NR Number of Registers EC Error Code LF Line Feed NB Number of bytes ASCII Checksum Modbus RTU Format gt 3 5 Byte Number 4156 1 03
35. ebsite into the directory that will also contain your data files such as cAcurves Connect your transmitter to the PC and double click on curve exe which is an executable file Follow the computer prompts and extensive help information Pressing R Enter returns to the main menu You will be given the choice of four data entry modes which are explained in detail 1 Text file entry mode 2 2 coordinate keyboard entry mode 3 2 coordinate file entry mode 4 Equation entry mode 33 19 MODBUS PROTOCOL TRANSMITTER COMMUNICATIONS 1 0 GENERAL The Modbus capability conforms to the Modbus over Serial Line Specification amp Implemen tation guide V1 0 Both the Modbus RTU and Modbus ASCII protocols are implemented This 5 page manual section presents key programmable Modbus features Our detailed Modbus manual can be downloaded from http www laurels com downloadfiles modbus pdf Modbus RTU Baud Rate 300 600 1200 2400 4800 9600 or 19200 Data Format 1 start bit 8 data bits 1 parity bit 1 stop bit 11 bits total None Odd Even if None then 2 Stop bits for 11 total Address 0 for broadcast 1 247 for individual meters Modbus ASCII Baud Rate 300 600 1200 2400 4800 9600 or 19200 Data Format 1 Start bit 7 Data bits 1 Parity bit 1 Stop bit 10 bits total None Odd Even if None then 2 Stop bits for 10 tota
36. endent of the transmitted units For example 20 000 mA or 20000 are both transmitted as 20000 counts For process amp DC ratio transmitters three scaling methods can be selected in Instrument Setup Software 1 Scale and offset 2 Coordinates of 2 points and 3 Reading coordinates of 2 points which uses actual signals Only menu items applicable to the selected method are presented Note that full scale ranges are 20000 counts For resolution purposes the 300V and 600V ranges are 2000V 100 mV count and the 5A range is 20A 1 mA count zd DC ratio operation is available for use with bridge and potentiometer type sensors and is un affected by variations in the power supply voltage This mode is selected at the input connector and by setting the Signal Input Mode to Ratio Example Transmit the digital reading in amps and as 4 20 mA from a 500 100 current shunt Application Use a 500 100 500A 100 mV current shunt Digitally transmit the DC current reading in amps with 0 1A resolution Also transmit a 4 20 mA signal corresponding to 0 200A Custom Curve Disabled 5 Offset E 50000 0000 0 Low In Low Read High In High Read 00000 0000 0 10000 0500 0 1 0 Scaling Relay Alarms Communication Scaling InputeDisplay Scaling Filter Relay Alarms Communication Relay Alarms Communicati Analog Out Analog Out w zm 2000
37. er label A user can reconfigure the transmitter by opening the case and moving jumpers Transmitter scaling is via serial connection to a PC using MS Windows based Instrument Setup Software which can be downloaded at no charge The required transmitter to PC interface cable is available for purchase oy 4 RECEIVING amp UNPACKING YOUR TRANSMITTER Your transmitter was carefully tested and inspected prior to shipment Should the transmitter be damaged in shipment notify the freight carrier immediately In the event the transmitter is not configured as ordered or is inoperable return it to the place of purchase for repair or replacement Please include a detailed description of the problem 5 SAFETY CONSIDERATIONS A Warning Use of this transmitter in a manner other than specified may impair the protection of the device and subject the user to a hazard Do not attempt to operate if the unit shows visible damage Cautions e his unit may be powered from 85 264 or with the worldwide voltage power supply option or from 12 32 Vac or 10 48 Vdc with the low voltage power supply option Verify that the proper power option is installed for the power to be used e The 85 264 Vac power connector P1 Pins 1 3 is colored Green to differentiate it from other input and output connectors The 12 32 Vac or 10 48 Vdc power connector is colored Black This transmitter has no power switch It will be in operation as soon as power is applie
38. file into the transmitter by clicking on DPM gt Put Setup You can save your setup file to disk by clicking on File gt Save Setup and retrieve a previously saved file from disk by click on File gt Open The best way to learn IS software is to experiment with it For context sensitive help for any data entry field under any tab select that field and press the F1 key Input Display Scaling Filter Relay Alarms Communicatio Analog BASIC Sig Cond Option EXTENDED id pc pas Input Display Control Inputs Control Input 1 Control Input 2 Both Ctrl 1 2 Meter Reset Meter Hold Meter Reset v Meter Reset Meter Hold Meter Reset lt A Function Reset Peak Displa Meter Reset Meter Hold Peak Displa Function Reset Tare Meter Reset Peak Display Tare Function Reset Tare Meter Reset Meter Reset DP2 Neither DP1 DP3 Both DP4 None DP3 Neither DP2 Both DPS _ None get to the Input Display tab click gt Get Setup to retrieve the current setup information from your DPM transmitter then on View gt Setup Use the Input Display screen to set up Signal Input Display and Control Inputs The software reads the signal conditioner type but not the range which is set by jumpers The 50 60 Hz Line Freq selection is used to optimize filtering for 50 or 60 Hz electrical noise For ratiometric operation with a DC signal conditione
39. gt 010 020 Addr gt 001 001 munications Response 010800010000B1CB 010800010000F6crlf Response None None ent Response 010404000009D67C4A 010404000009D618crlf 1 37 00 Response 01030400000E74FE74 011000010002ECcrlf 1 37 00 Response 01030400000E74FE74 01030400000 7476 Suggested as first message after power up If transmitter is in Listen Only mode no response is returned Example while reading 425 18 Decimal point is ignored 9 0 INTERNAL REGISTERS Please refer to the full Modbus Protocol Communications Manual which is downloadable from our website 38 20 CUSTOM ASCII PROTOCOL TRANSMITTER COMMUNICATIONS 1 0 SERIAL COMMUNICATION FORMAT Mode Full Duplex Separate transmit and receive lines and Half Duplex RS485 only Baud Rate 300 600 1200 2400 4800 9600 19200 selectable with Instrument Setup software Word length 8 data bits Stop bit 1 The Custom ASCII protocol is simpler than the Modbus protocol This 5 page manual section provides some of its key programmable features Our detailed Serial Communications manual can be downloaded from http www laurels com downloadfiles serialcom2 pdf 2 0 MEASUREMENT DATA FORMAT The basic measurement data format consists of 8 ASCII characters for analog input DPM transmitters such as 999 99 lt CR gt where CR is the carriage return character The
40. he load cell output will be 30 mV Alarm weight over 4 000 tons but wait for 8 readings over this limit or 15 msec so as not to alarm on a noise spike Custom Curve Disabled 5 Offset gt Jee 16667 Jee 00 000 Low In Low Read 00 000 00 000 Jee 00 000 LIN 30 000 05 000 03 000 Scaling Filter Relay Alarms Communicati Analog Out Analog Out com 0 000 Z 000 ez 000 Solution e Jumper signal conditioner for 50 000 mV range Set power supply to 10V excitation e Under Input Display tab set Mode to Strain range to 50 0mV decimal point to 3 places and 50 60 Hz Line Freq to 60 Hz to reject 60 Hz noise e Under Scaling tab if Scale Offset method is selected set Scale to 0 16667 The reason is that we want 30000 input counts to correspond to 5000 output counts e Under Scaling tab if Coordinates is selected set High In to 30 000 mV and High Read to 5 000 tons e Under Relay Alarms tab enter 4 000 tons for Setpoint 1 and 8 readings to alarm e Under Analog Out tab set Range to 0 10V Voltage Lo Range Reading to 0 000 tons and Hi Range Reading to 5 000 tons 22 12 THERMOCOUPLE SIGNAL CONDITIONER BOARD The thermocouple signal conditioner board can be configured via jumpers for 7 thermo couple types each in a single range J K T E N S R Instrument Setup Software recognizes the boar
41. l Address 0 for broadcast 1 247 for individual meters 2 0 FRAMING Modbus RTU Message frames are separated by a silent interval of at least 3 5 character times If a silent interval of more than 1 5 character times occurs between two characters of the message frame the message frame is considered incomplete and is discarded Frame Check 16 bit CRC of the complete message excluding CRC characters Modbus ASCII The message begins immediately following a colon and ends just before a Carriage Return Line Feed CRLF All message characters are hexadecimal 0 9 A F ASCII coded The system allowable time interval between characters may be set to 1 3 5 or 10 seconds Frame Check 1 byte 2 hexadecimal characters LRC of the message excluding the initial colon and trailing LRC and CRLF characters 3 0 ELECTRICAL INTERFACE 5232 two wire half duplex 5485 or four wire full duplex 85485 signal levels are selectable via jumpers on the transmitter main board and a the connector Please see Section 13 The RS485 selection provides a jumper selection for insertion of a line termination resistor In case of a long line greater then 500 ft to the first device a termination resistor should be selected for the first device In case of a long line between the first and last devices a termination resistor should be selected for the first and last devices Never add termination resistors to more than two devices on the same lin
42. n is the number of words to be read or written aa is the most significant address in nonvolatile memory of the words to be read or written data is n words of 2 bytes or 4 hex characters per word in order from the most to the least significant address The coded number of words n consists of a single character representing values from 1 to 30 as shown under CHARACTER 4 The most significant address aa consists of 2 hex characters as shown under NONVOLATILE MEMORY ADDRESSES 43 21 LT SERIES ANALOG INPUT TRANSMITTER SPECIFICATIONS Mechanical Case tcu era RE tue n eb pe EE edd 120 x 101 x 22 5 mm Case TOUR Ir EE 35 mm DIN rail per EN 50022 Electrical connections eene Detachable screw plug connectors Environmental Operating tempe e i 0 C to 55 C Storage Temper atlas ca asco udin rd pel aisi P M e P bri cru Ped 40 C to 85 C BelatiV diUtMUIby os oco o aen b entes 95 from 0 C to 40 C non condensing Power amp Electrical Power to Transmitter 85 264 Vac or 90 300 DC range is not ETL certified 12 32 Vac or 10 48 low voltage power option Power Isolation 250 Vrms between power signal input analog output relays and serial 1 0 Transmitter Setup Selection of signal ranges amp temperature sensors Jumpers on signal conditioner board Selection of serial format excitation output analog output
43. on Type to determine when an alarm becomes Active or Inactive Alarm Source Depending on the Signal Input Mode and Function selected under the Input Display tab the alarm can be assigned to any of up to three Items for example to Item 1 A rate B rate Item 2 A rate or Item 3 B rate Alarm State If Active High is selected the Active Alarm State is defined as being above the setpoint If Active Low is selected the Active Alarm State is defined as being below the setpoint If Disabled is selected the Alarm State is always inactive Relay State A setting with ties the Relay State to the Alarm State If Active On is selected the relay will be closed when the Alarm State is 1 If Active Off is selected the relay will be open when the Alarm State is 1 Deviation Type Three choices are offered Split Hysteresis Span Hysteresis and Band Deviation These define how Setpoint and Deviation are to be combined to set Alarm State Heater OFF OFF OFF ON Setpoint 1000 Setpoint 1000 Deviation 50 Deviation 50 Hysteresis band 100 Pass band 100 Span Hysteresis for heater control Band Deviation for component testing In Split Hysteresis the relay opens or closes when the reading goes above the Setpoint plus one Deviation and closes or opens when the reading falls below the Setpoint less one Deviation Two Deviation limits lie symmetrically around the Setpoint to create a deviation band A nar
44. ormity Error 210 to 760 C 0 09 C 347to 1400 F 0 16 F 244 to 1372 C 0 10 C 408to 2501 F 0 17 F 0 to 400 C 0 03 C 257 to 0 C 0 20 C 32 to 752 F 0 05 F 430 to 32 F 0 36 F 240 to 1000 C 0 18 C 400 to 1830 F 0 32 F 245 to 1300 C 0 10 C 410 to 2370 F 0 17 F 46 to 68 C 0 12 C 51 to 213 F 0 22 F 45 to 1768 C 0 17 C 49 to 3214 F 0 31 F Resistance Input ume s Some zs _ 0 20 000 O 0 200 00 O 0 2000 0 0 0196 of range 0 20000 2 counts 0 200 00 0 2 0000 MO Factory special fixed range Igel 2 3 or 4 wire Span CEMD CO HEEN 0 003 of reading C Over voltage DEIER 125 Vac Open sensor indication 0 mA or 20 mA output jumper selectable 47 22 Laurel Electronics Inc warrants its products against defects in materials or workmanship for a period of one year from the date of purchase In the event of a defect during the warranty period the defective unit may be returned to the seller which may be Laurel or a Laurel distributor The seller may then repair or replace the defective unit at its option In the event of such a return freight charges from the buyer shall be paid by the buyer and freight charges from the seller shall be paid by the seller LIMITATION OF WARRANTY The foregoing warranty shall not apply to defects resulting from 1 Improper installation or miswiring
45. p of the DPM Main Menu screen The PC first recognizes the type of board then prompts you to apply specific jumpers and specific known signals for each range Press Repeat to take more readings When you have decided on which reading to accept press on the number 1 through 10 of that reading The RTD Ohms signal conditioner board cannot be calibrated using the Calibration screen of Instrument Setup Software Instead use the Scaling tab under Setup Here you can enter values for Scale and Offset for a specific range These corrections apply to resistance not to RTD temperature To calibrate RTD temperature refer to the published resistance table for your RTD type and calibrate resistance For example if your measured resistances are 0 1 low apply a scale factor of 1 01 x m 18 CUSTOM CURVE LINEARIZATION Curve exe is a DOS based executable PC program used to set up an Extended transmitter so that the internal digital readings have a user defined non linear relationship with the input signal For example it allows a transmitter to correct for transducer nonlinearity Calculated linearizing parameters are downloaded from a PC into non volatile memory of the transmitter The curve fitting algorithm uses quadratic segments of varying length and curvature and includes diagnostics to estimate curve fitting errors The program is self prompting avoiding the need for detailed printed instructions To get started download curve exe from our w
46. plash screen the Communications Setup screen below will appear Help Protocol Parity Custom ASCII IS None Modbus Modbus ASCII Communications Setup Device Type C Panel Meter L LW Display Transmitter LT No Display C Transmitter LTE No Display i 85485 Communications Type 7 i Full Half Duplex In the Communications Setup screen select the Custom ASCII as the protocol as this is the factory default setting Select Transmitter LT as the Device Type and RS232 the Communi cations Type This will take you to the Establish Communications screen Establish Communications Ports Band Rate Establish Com 1 C 300 Com 2 C 600 Com 3 1200 Com 4 C 2400 Com 5 4800 C Com 6 9600 C Com 7 C 19200 Com 8 C 38400 Future C Com 9 Other Com Port In the Establish Communications screen select your Com Port and 9600 and the Baud Rate You will be able to change your protocol and baud rate later under the Communication setup tab Click on Establish and the two fields at the bottom of the screen should turn green Click on the Main Menu button From the Main Menu click on DPM gt Get Setup to retrieve or get the existing setup data from your DPM transmitter Click on View gt Setup to bring up screens which allow you to easily edit the setup file using pull down menus and other selection tools You can download or put your edited
47. r set the Signal Input Mode to Ratio In this mode the transmitter tracks a ratio of the applied excitation voltage and is unaffected by changes in the excitation voltage This capability is used for resistive bridge sensors and voltage dividers such as potentiometers which track wiper position Clicking on the Control Inputs field opens a pull down menu which allows selection of the roles of Control Input 1 Control Input 2 and simultaneous Control Inputs 1 and 2 For example with a DC signal conditioner and the highlighted selection grounding Control Input 1 places the transmitter on Hold grounding Control Input 2 causes the Peak reading to be transmitted and grounding both Control Inputs 1 and 2 causes a Function Reset which resets Peak Valley and latched alarms Note that the roles of the Control Inputs vary with the type of signal conditioner Only the applicable roles will be displayed 210 Input Display Scaling Filter Relay Alarms Communicatio Analog Scaling Scale Offset Scale Offset gt 1 0000 000 00 Coordinates gt Low In Low Read High In High Read Start Low In Start High In Capture Low In Capture High In Enter Dec Value 22 ANN _ To Click on the Scaling tab to scale your transmitter You will be given the choice of three scaling methods for inputs other than temperature 1 Scale and Offset method 2 Coordinates of 2 points method where Low In Low
48. r PC combination into a printing digital oscilloscope Graph generates a histogram where the horizontal axis is the internal reading and the vertical axis is the number of occurrences of readings The display continually resizes itself as the number of readings increases 0 1 2 3 4 5 B 7 8 9 10 Print Save Pause Continue New Scale End Plot 14 1280 1024 768 MIR 512 M BB E 256 C 2725 2750 2775 2800 2825 2850 2875 Print Save Pause Continue New Scale End Graph e The Jumpers pull down menu shows jumper positions for the selected signal conditioner boards and the main board duplicating information in this manual DE Signal Conditioner Jumpers 1 Excitation 2 Excitation 3 Signal In 4 Signal In DC Signal Conditioner Voltage Notes 1 Click on Jumpers Power Supply to select jumpers for 5 10 or 24V Excitation 2 Upper case letter positions require 5mm 2in jumpers lower case 2 5mm 0 1in jumpers 3 Store spare jumpers on single unused jumper posts NOT associated with upper case letters 15 8 OPENING YOUR TRANSMITTER CASE WHEN TO CHA
49. row hysteresis band is often used to minimize relay chatter A wide band can be used for on off control In Span Hysteresis operation is as for Split Hysteresis except that the Setpoint is always on the high side and a single Deviation lies below the Setpoint to create the hysteresis band Span Hysteresis is considered by some to be more intuitive than Split Hysteresis In Band Deviation the relay opens or closes when the reading falls within the deviation band and closes or opens when the reading falls outside Two deviation limits lie symmetric ally around the setpoint to create the deviation band Passbands around a setpoint are often used for go no go component testing 29 Alarm Type Selections are Non Latching and Latching Under Non Latching the relay is only closed or open while the Alarm State is Active Under Latching the activated relay remains closed or opens until reset regardless of the Alarm State Resetting is normally achieved by temporarily grounding one of the transmitter s control inputs which has been set to Function Reset under the Input Display tab Alarms 1 2 No Rdgs to Alarm Selections are binary steps from 1 to 128 This is the number of consecutive alarm readings that must occur to create an Active alarm Numbers higher than 2 provide some Alarm filtering so that 1 or 2 noisy readings do not cause an Active Alarm The Alarm becomes Inactive if one of the consecutive readings fails to be an Alarm rea
50. se FF 00 Function Reset Peak Valley FF 00 Latched Alarm Reset FF 00 Peak Reset FF 00 Valley Reset FF 00 Tare Command Weight Transmitter 00 00 resets Tare 2352 FC08 Diagnostics Checks communications between the Master and Slave and returns the count in the Modbus Slave counters which are reset when the meter is reset OS Data Function Description Send Data Code 00 00 Same Returns Query Data N x 2 bytes Echo Request as sent 00 01 Restarts Communications If in the Listen Only mode no response occurs Takes Slave out of the Listen Only mode and one of the following FF 00 Clears communications event counters 00 00 Does not clear communications event counters 00 04 00 00 Forces Listen Only All addressed and broadcast Messages are monitored and counters are incremented but no action is taken or response sent Only Sub Function 00 01 causes removal of this Listen Only state 00 0A 00 00 0000 Clears all Modbus slave counters 00 00 00 Total Returns total number of messages detected on the bus Message j including those not addressed to this Slave Excludes bad Count LRC CRC parity error or length lt 3 00 0C 0000 Checksum Returns total number of messages with bad LRC CRC Error parity or length lt 3 errors detected on the bus including Count those not addressed to the Slave 00 00 0000 Exception Returns total number of Exception responses returned by Error th
51. set Mode to Thermocouple range to deg C Resolution to 0 1 deg and 50 60 Hz Line Freq to 60 Hz to reject 60 Hz noise Under Relay Alarms tab select Span Hysteresis with a setpoint of 28 0 C and a devia tion of 4 C for Alarm 1 which will control the chiller Select a setpoint of 30 0 C for Alarm 2 which will be used to alarm over temperatures Under Analog Out tab set Range to 4 20mA Current Lo Range Reading to 15 0 C and Hi Range Reading to 35 0 C 24 13 RTD amp OHMS SIGNAL CONDITIONER BOARD The same signal conditioner board can be configured via jumpers for four types DIN 1000 platinum ANSI 1000 platinum 1200 nickel 100 copper or for five resistance ranges from 20 0000 to 200 00 A single fixed 2 resistance range R6 ordering option is provided by a factory modified signal conditioner board All ranges are factory calibrated with calibration factors stored in EEPROM on the signal condi tioner board Instrument Setup Software recognizes the board and will bring up the appropriate menu items for it however it does not recognize the jumper settings Items to be entered in Instrument Setup Software for the input side include Mode RTD or Ohms Range RTD type or ohms range and Scale and Offset a calibration correction applied to resistance Standard Board Modified Board Jumper Pt100 Ni120 N A Cu10 20 0000 N A 0 200 000 N A 0 2 0000 N A
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