USER`S MANUAL - Moore Industries International
Contents
1. COMMON COM Mm COM COMMON UPPER RELAY NORMALLY CLOSED UNC LNC LOWER RELAY NORMALLY CLOSED OPTION TX FOR TRANSMITTER ACC DC EXCITATION REF FOR DEVIATION ALARM AC DC 4 IN CURRENT OR VOLTAGE INPUT GND IN CURRENT OR VOLTAGE INPUT FOO NIVI O IOI SISINIO NOTES 1 Each unit is factory configured for ac or dc power 2 Each unit is factory configured for specific current or voltage input Figure 2 STD DCA Terminal Locations Page 7 DCA saint my DCA naa UPPER LoweR UNO2 UPPER RELAY 2 NORMALLY OPEN COM COMMON UNO2 UPPER RELAY 2 NORMALLY CLOSED UPPER RELAY 1 NORMALLY OPEN UNO1 LNO1 LOWER RELAY 1 NORMALLY OPEN COMMON COM COM COMMON LNC1 LOWER RELAY 1 UPPER RELAY 1 NORMALLY CLOSED UNC1 JMG olslolac NORMALLY CLOSED LNO2 LOWER RELAY 2 igen 5g EE NORMALLY OPEN tg COM COMMON AC DC LNC2 LOWER RELAY 2 ered NORMALLY CLOSED GND LONG IVIVIO O CO FOOIOW VIO O il a al Si f f f OPTION TX FOR TRANSMITTER EX2. is used in DPDT equipped units to refer to the number of the alarm output as in UNO1 and LNC2 Figure 9 The DCA Calibration Setup Special Considerations for AR equipped DCA s Units equipped with the AR Option are factory set for specific alarm delay times ranging from 1 to 30 seconds refer to Options listing The AR is set and fully calibrated according to customer requirements before unit shipment The delay in an AR equipped DCA s transition from normal to alarm condition makes the calibration of trip points difficult and a temporary disabling of the option is therefore recommended during the calibration procedures To defeat the AR Option diodes on PC1 of the DCA must be shorted There is a diode for each installed relay DCA s in the STD housing must be partially disas sembled to access the AR diode s See figure10 Figures 11 and 12 show the location of the diodes on the various types of AR equipped DCA Access to the AR diode s on PC style DCA s may be difficult if the unit being calibrated is already installed in its rack Moore Industries offers an Extender Card accessory for calibrating units under these circum stances The Extender P N 350 513 00 mates with the connector on the PC style DCA and then plugs in to the rack so that the unit is clear of the rack front allowing for access to the diode s Calibration Procedures Before beginning the actual calibration of the DCA check the
3. DCA Setting the Dead Band See figure 1 for a graphic representation of the DCA dead band The dead band may be thought of as an area around a trip point in which the alarm will not reset In ascenario using a high alarm DCA as an example the unit will signal an alarm at its trip point and will continue to signal an alarm as long as the input is above that point Without an adjustable dead band the relay will reset when the input drops below the trip point When equipped with the AD Option however no reset will occur until the input continues to drop to the dead band setting presumably some percentage of span below the trip point To set the DCA dead band 1 Make sure dead band pots are turned fully counterclockwise Set trip points for installed alarms as described in preceding section Con nect ohmmeter to UPPER alarm section to set UPPER dead band or to LOWER section for setting LOWER dead band 2 Apply input at the dead band setting level Typically this will be lower than trip point for high alarms or higher than trip point for low alarms 3 Turn appropriate dead band pot slowly clockwise observing LED and ohmmeter 4 Set pot stop turning at exact point at which relay changes state 5 Verify desired setting by varying input above and below trip point observing both LED and ohmme ter to confirm appropriate change of relay state Unit will trip at trip point setting and will not reset u
4. Moore Industries Direct Current Alarm DCA is a highly versatile fully adjustable device that is factory configured to accept either current or voltage input The unit s internal relays are tripped when input deviates from a customer set safe range defined by adjustable trip points The DCA is ideal for use in an alarm system where it may be used to activate a warning device or to drive an analog indicator This manual provides a brief description of the DCA including its physical characteristics and options a table of performance and operating specifications a set of procedures for calibrating the unit instructions for installation including physical mounting and electrical connections and finally information on basic maintenance and troubleshooting Notes Cautions and Warnings are included as a means of identifying those practices that may present unnecessary inconveniences notes result in dam age to the unit cautions or cause injury warnings Description The DCA comes in either Moore Industries standard STD or plug in card PC housing The STD unit can be used with a variety of mounting options including those suitable for use with explo sion proof and NEMA enclosures PC style DCA s are designed for use with Moore Industries multi position card racks the surface mounted SMR or the rack mounted RMR Both STD and PC DCA s are available with either single or dual alarm configura
5. This switch or circuit breaker must be located within three meters of the unit WARNING Terminals on this unit may be connected to hazardous voltages Before making ANY connections to this unit ALL hazardous voltages must be de energized The circuit breaker or switch will only remove power to the unit hazardous voltages may still be con nected to other terminals on the unit Installation Category All terminals are rated CAT Il except for terminals with the RF option These terminals are rated CAT I The Interface Solution Experts Page S 1 Equipment Ratings Moore Industries transmitters do not generate haz ardous voltages They measure voltage or current inputs and generate low voltages and currents lt 42Vdce and lt 50mAdc Products connected to Moore Industries transmitters should be designed to receive these inputs Moore Industries alarms do not generate any hazard ous voltages Alarm contacts are wired in series with power sources and their intended loads The correct load should be selected for the power source Supply Wiring All power connections shall be made with 14 or 16 AWG 083mm or 064mm wire The end of each conductor should be stripped no more than 8mm The end of the stripped wire should be tinned with solder or inserted into a ferrule and crimped before being placed into a terminal block Conductors connected to screw type connections must have a ring or spade lug crimped on the end
6. Calibration Section of this manual for instructions Any units found to be performing below specifications after a recalibration should be returned to the factory immediately Instructions for unit return can be found on the back cover of this manual Customers may also contact the friendly folks in Moore Industries Customer Service Department at 1 800 999 2900 for technical assistance Ul moore INDUSTRIES August 1992 Purpose This supplement is being distributed to users of Moore Industries Direct Current Alarm DCA to in form them of corrections additions to the current manual since its release date These changes will be incorporated in the manual during its next revi sion Corrections The wording of the second paragraph of step 4 of the Setting Low Alarm Trip Points page 14 and Set ting High Alarm Trip Points page 15 calibration procedures should read In alow alarm 100 input is a non alarm condi tion If connected to XNO and COM terminals X U or L upper or lower NO normally open Resis tance across these terminals in a fail safe alarm is near zero In a non fail safe alarm resistance will be infinite DCA Direct Current Alarm SUPPLEMENT To Manual No 192 701 00 G It is important to understand that the normal con dition of these relays refers to the non energized or de energized state of the relay This means that the terminal labeling is true when power is removed from
7. LATER THAN TWELVE MONTHS FROM THE EARLIEST DATE ON WHICH THE BUYER COULD REASONABLY HAVE DISCOVERED THE ALLEGED DEFECT OR BREACH RETURN POLICY For a period of thirty six 36 months from the date of shipment and under normal conditions of use and service Moore Industries The Company will at its option replace repair or refund the purchase price for any of its manu factured products found upon return to the Company transportation charges prepaid and otherwise in accordance with the return procedures established by The Company to be defective in material or workmanship This policy extends to the original Buyer only and not to Buyer s customers or the users of Buyer s products unless Buyer is an engineering contractor in which case the policy shall extend to Buyer s immediate customer only This policy shall not apply if the product has been subject to alteration misuse accident ne glect or improper application installation or operation THE COMPANY SHALL IN NO EVENT BE LIABLE FOR ANY INCIDENTAL OR CONSE QUENTIAL DAMAGES WORLDWIDE e www miinet com China sales mooreind sh cn Tel 86 21 62491499 FAX 86 21 62490635 United Kingdom sales mooreind com Tel 01293 514488 FAX 01293 536852 Belgium info mooreind be Tel 03 448 10 18 FAX 03 440 17 97 The Netherlands sales mooreind nl Tel 0 344 617971 FAX 0 344 615920 United States info miinet com MO ORE Tel 818 894 7111 FAX 818 891 2
8. Moore Industries Sales Representative AD Option Externally adjustable Dead Band Front panel potentiometers vary dead band 1 to 20 percent of span nominal 1 to 50 percent of span AD50 or 1 to 100 percent AD100 of span AD Option not available with some option combinations AR Option Response Time Delay Set by the factory for output delays of 1 to 5 10 15 20 25 or 30 seconds according to customer specification DA Option Deviation Input Unit signals alarm condition when the difference between two inputs exceeds adjustable percent of full span Requires DI Option or 2X input Not available with some option combinations DI Option Dual Input Configures dual alarm DCA to operate as two single alarm units Standard DI unit provides a high alarm for one input and a low alarm for the other DI Option not available with some option combinations DPDT Option Double Pole Double Throw Form 2C Relays Contact 5 amps at 28 Vdc or 117 Vac non inductive DPDT Option not available with some option combinations FU Option Power Fuse 400 mA rated fuse on PC style unit Use of the FU Option with the STD housing requires special engineering HS Option Hermetically Sealed Relays Rated 1A 117 Vac non inductive 2A 28 Vdc Meets requirements for installation in Class Division 2 locations MR Option Manual Reset External reset push button for single and dual alarm units In p
9. Non alarm Low Fail Safe Input decreases and drops below Trip Point See Note 2 ON in Alarm Energized in Alarm OFF in Non alarm DE energized in Non alarm Low NON Fail Safe NOTES 1 Older DCA s may use X1 for H1 X2 for H2 X3 for L1 and X4 for L2 2 The UPPER and LOWER labeling on the DCA front panel is for reference only Configurations where LOWER terminals and pots pertain to the units high alarm for example are quite possible 3 Relays in fail safe alarms are DE energized in the event of power loss to the unit Page 3 DCA Table 2 lists the performance and operational specifi Options cations for the unit Each DCA is configured according to customer requirements The paragraphs on the following pages highlight some of the options available Table 2 DCA Performance and Operational Specifications Characteristic Specifications Current 1 5 mA 200 nominal input impedance 4 20 mA 50Q nominal input impedance 10 50 mA 20 nominal input impedance Selectable Current SC comes with three load resistors for selecting1 5 4 20 or 10 50 mA See Note 1 Voltage 0 25 1 25 V 1MQ minimum See Note 2 1 5 V 1MQ minimum Consult factory for dual input and special range options Factory configured with one Single DCA or two Dual DCA single pole double throw SPDT form C mechanical relays rated for 5 A 117 Vac non inductive or 28 Vdc User selects Normally Open NO
10. counter clockwise LOWER RELAY NORMALLY OPEN LNO COMMON COM LOWER RELAY NORMALLY CLOSED LNC OPTION TX FOR TRANSMITTER EXCITATION REF FOR DEVIATION ALARM CURRENT OR VOLTAGE INPUT IN CURRENT OR VOLTAGE INPUT IN Page 11 DGA GND DC AC DC ACC UNC UPPER RELAY NORMALLY CLOSED COM COMMON UNO UPPER RELAY NORMALLY OPEN Figure 7 DCA in an Explosion proof Enclosure Terminal Locations LOWER RELAY NORMALLY OPEN LNO COMMON COM LOWER RELAY NORMALLY CLOSED LNC UPPER ALARM CURRENT OR VOLTAGE INPUT IN UPP LOWER ALARM CURRENT OR VOLTAGE INPUT IN LOW CURRENT OR VOLTAGE INPUT IN GND DC AC DC ACC UNC UPPER RELAY NORMALLY CLOSED COM COMMON UNO UPPER RELAY NORMALLY OPEN Figure 8 DCA with DI Option in an Explosion proof Enclosure Terminal Locations Page 12 DCA APPROPRIATE CALIBRATED ADJUSTABLE a OHMMETER VOLTAGE SOURCE SEE NOTE 1 SEE NOTE 3 VDC or VAC POWER SOURCE SEE NOTE 2 NOTES 1 Check unit model number for appropiate input source 2 Check unit model number for appropriate power source 3 X U for upper or L for lower Connect ohmmeter to NO for terminals of normally open relay to NC for normally closed
11. housing and refer to figures 13 or 14 while executing the procedure NOTE The following procedure assumes that the DCA being calibrated has its UPPER alarm section configured as a high alarm and its LOWER alarm section configured as alow alarm If this is not the case for your DCA interchange references to UPPER and LOWER as appropriate Page 17 DCA LED S LOWER FULL SCALE ADJUSTMENT POT DUAL ALARMS ONLY UPPER FULL SCALE ADJUSTMENT POT Figure 13 Location of the FSA Potentiometers on the STD DCA PC1 UPPER FULL SCALE ADJUSTMENT DUAL ALARM ONLY CONNECTOR PINS FRONT PANEL FULL SCALE ADJUSTMENT LOWER FULL SCALE SINGLE ALARM ONLY ADJUSTMENT DUAL ALARM ONLY Figure 14 Location of the FSA Potentiometers on the PC DCA Page 18 DCA 1 With the hookup described in the Calibration Setup Section complete disable AR Option as described in section titled Calibrating AR equipped DCA s Connect ohmmeter to UP PER alarm terminals first 2 Verify that all pots are set fully counterclockwise to 0 00 NOTE Steps 3 through 10 apply to high alarms Skip to step 11 to calibrate the ten turn dials on low alarms 3 Apply 0 of appropriate input from application Refer to unit s model number and specifications listing
12. we Indicates any option as listed on product data sheet Indicates any housing excluding plug ins and explosion proof housings e Conforms to the following EMC specifications EN 50081 2 1993 Generic Emission Standard Industrial Environment EN 50082 2 1995 Generic Immunity Standard Industrial Environment EN 61010 1 1995 Safety requirements for electrical equipment for measurement and control use e Supplementary Information RFFilters are required for the CE option 4 March 1997 LLY A ML Date Richard Ojeda Robert Stockham Quality Assurance Manager Moore Industries Europe General Mgr European Contact Your Local Moore Industries Sales and Service Office WORLDWIDE e www miinet com United States info miinet com Belgium info mooreind be China sales mooreind sh cn MOORE Tel 818 894 7111 FAX 818 891 2816 Tel 03 448 10 18 FAX 03 440 17 97 Tel 86 21 62491499 FAX 86 21 62490635 INDUSTRI ES Australia sales mooreind com au The Netherlands sales mooreind nl United Kingdom sales mooreind com Tel 02 8536 7200 FAX 02 9525 7296 Tel 0 344 617971 FAX 0 344 615920 Tel 01293 514488 FAX 01293 536852 RETURN PROCEDURES To return equipment to Moore Industries for repair follow these four steps 1 Call Moore Industries and request a Returned Material Authorization RMA number Warranty Repair If you are unsure if your unit is still under w
13. 0 input 10 00 at 100 input Readjust both FSA pots as necessary Calibrating DA equipped Units If ordered the Deviation Alarm Option allows the user to set alarm trip points based on the difference between two inputs This difference is expressed as a percentage of total input span and unit relays are tripped whenever process input varies more than high alarm or less than low alarm the set percentage To calibrate DA equipped DCA s a second input source will be needed Refer to table 3 and use two of the appropriate sources as specified Refer to figures 2 through 8 as appropriate to deter mine which of the unit terminals is used for the second reference input connection Finally refer to the setup shown in figure 9 and add the connection for the second input source as follows REF is used for positive reference input and the negative connection for both inputs is common the IN Tocalibrate DA equipped DCA s 1 With setup complete as described in preceding paragraph and all pots set fully counterclockwise determine percentage of rated input span that is to serve as difference between reference input and input 2 2 Setreference input to 50 of rated span 3 Setinput 2 to desired percentage above or below reference 4 Settrip points as appropriate using UNC pot for UPPER normally closed alarm UNO pot for UPPER normally open LNC for LOWER normally closed and LNO for LOW
14. 816 INDUSTRIES rei 02 8535 7200 Fax 02 9525 7096 2006 Moore Industries International Inc Specifications and Information subject to change without notice
15. CITATION REF FOR DEVIATION ALARM IN CURRENT OR VOLTAGE INPUT IN CURRENT OR VOLTAGE INPUT Figure 3 STD DCA w DPDT Option Terminal Locations Figure 4 shows the labeling for a STD DCA equipped WARNING with the DI Option Note that both inputs share the To guard against accidental electric IN terminal shock it is recommended that the protec tive plastic cover be re installed over the terminal strip of the STD DCA before applying power to the calibration setup Page 8 DCA Setup for the PC DCA There are two methods of carrying out the calibration setup connections on the PC DCA Most often the unit is installed in one of Moore Industries card racks and the calibration equipment is connected to the appropriate rack terminal strip Figure 5 illustrates the PC DCA installed in the surface mounted card rack the SMR Figure 6 shows the terminal strip labeling for rack units when the DCA is equipped with the DI Option As an alternative to using the card rack individual PC DCA s can be checked with Moore Industries Pro cess Power Supply the PPS equipped with its CT Option The CT equipped PPS accepts the connec tion strip of the PC DCA in a connector built into its side panel The PPS front panel provides access to terminal strips similar to those used on the card racks ACC DC AC DC GND IO
16. DCA can be ordered without low alarms as in a high high configuration Dual alarm units can be ordered with either one or both relays configured as low alarms and DPDT equipped DCA s may be configured with any combina tion of high low alarms Refer to the unit s model number to determine the alarm configuration and perform the following proce dure for each installed low alarm 1 Check model number to verify correct power input and apply 117 or 240 Vac 24 or 45 Vdc as appropriate 2 Make sure that ohmmeter in calibration setup is connected to appropriate NO or NC terminals as desired Apply 100 of application s input span current or voltage as appropriate to DCA If low alarm is configured as fail safe L1 in model number verify that appropriate LED for that alarm is lit LED for non fail safe low alarm L2 in model number will not be lit Note ohmmeter reading In alow alarm 100 input is a non alarm condi tion If connected to XNO and COM terminals X U or L UPP or LOW NO normally open Resistance across the terminals in a fail safe alarm is zero In a non fail safe alarm resis tance will be near infinite If connected to XNC and COM terminals resis tance is infinite in fail safe zero in non fail safe alarms Set input to desired low alarm trip point level Turn appropriate low alarm adjustment pot may be labeled UPPER or LOWER slowly clock wise Observe LED and
17. ER normally open Base settings on input 2 Units factory configured as high alarms will trip when input 2 exceeds the desired difference Low alarms trip when input 2 falls below desired difference For Example A DA equipped DCA is rated for two 4 20 mA inputs 2X in the model number The application calls for an alarm condition when input 2 varies more than 25 of span from the reference input Span 16 mA 25 of 16 4 mA The reference input is set to 50 of rated span or 12 mA Input 2 is set 25 higher 16 mA The trip point pots are turned clockwise until relays change state Regardless of how the reference input is varied from 4 to 20 mA as long as input 2 is likewise varied at a 50 offset the alarms are not tripped However if the reference is at 12 mA and input 2 is at 20 mA the high alarm relay will indicate an alarm condition Likewise if the reference is at 12 mA and input 2 is at 14 mA the low alarm relay will indicate analarm Page 19 DCA Installation Installing the DCA is typically accomplished by physically mounting the unit then effecting the electrical connections Mounting Figures 15 and 16 respectively show the outline dimensions of the DCA in the STD and the PC housing styles The drawing of the STD housing includes the dimensions of the U bracket typically included with that type of DCA and also of the side housing used for DCA s equipped
18. I SISOS i Ei F Ei F E is E Whether using the card rack or the PPS CT combina tion note that the DC power connections are not made directly to the unit but to the terminal strips of either the card rack or the PPS DC power is supplied to the DCA at its pins 8 and 9 NOTE The UPPER and LOWER labeling used on the DCA is for reference purposes only The trip point pots allow for adjustments through 100 percent of span It is therefore possible for the connections to the LOWER labeled alarm section to be configured as a high alarm and the UPPER section to be configured as a low alarm NOTE The LED s DO NOT always indicate an alarm condition rather they light to show that their complimentary relay is ener gized It is possible for a DCA to be configured such that the LED s are lit when input is in a non alarm state LNO LOWER RELAY NORMALLY OPEN COM COMMON __ INLOW LOWER LNC LOWER RELAY NORMALLY CLOSED IN UP UPPER CURRENT VOLTAGE INPUT CURRENT VOLTAGE INPUT IN NEGATIVE INPUT Figure 4 STD DCA with DI Option Terminal Locations Page9 DCA PCDCA M INTERNAL RACK SLOT AND CONNECTOR __ PC DCA COMPONENT SIDE gt SMR LOO s f O 6 oO tam Q OT
19. ITNESS FOR A PARTICULAR PURPOSE WITH RESPECT TO ANY GOODS OR SER VICES SOLD BY THE COMPANY THE COMPANY DISCLAIMS ALL WARRAN TIES ARISING FROM ANY COURSE OF DEALING OR TRADE USAGE AND ANY BUYER OF GOODS OR SERVICES FROM THE COMPANY ACKNOWL EDGES THAT THERE ARE NO WARRANTIES IMPLIED BY CUSTOM OR USAGE IN THE TRADE OF THE BUYER AND OF THE COMPANY AND THAT ANY PRIOR DEALINGS OF THE BUYER WITH THE COMPANY DO NOT IM PLY THAT THE COMPANY WARRANTS THE GOODS OR SERVICES IN ANY WAY ANY BUYER OF GOODS OR SERVICES FROM THE COMPANY AGREES WITH THE COMPANY THAT THE SOLE AND EXCLUSIVE REMEDIES FOR BREACH OF ANY WARRANTY CONCERNING THE GOODS OR SERVICES SHALL BE FOR THE COMPANY AT ITS OPTION TO REPAIR OR REPLACE THE GOODS OR SERVICES OR REFUND THE PURCHASE PRICE THE COMPANY SHALL IN NO EVENT BE LIABLE FOR ANY CONSEQUENTIAL OR INCIDENTAL DAMAGES EVEN IF THE COMPANY FAILS IN ANY ATTEMPT TO REMEDY DEFECTS IN THE GOODS OR SERVICES BUT IN SUCH CASE THE BUYER SHALL BE ENTITLED TO NO MORE THAN A REFUND OF ALL MONIES PAID TO THE COMPANY BY THE BUYER FOR PURCHASE OF THE GOODS OR SERVICES ANY CAUSE OF ACTION FOR BREACH OF ANY WARRANTY BY THE COMPANY SHALL BE BARRED UNLESS THE COMPANY RECEIVES FROM THE BUYER A WRITTEN NOTICE OF THE ALLEGED DEFECT OR BREACH WITHIN TEN DAYS FROM THE EARLIEST DATE ON WHICH THE BUYER COULD REASONABLY HAVE DISCOVERED THE ALLEGED DE FECT OR BREACH AND NO ACTION FOR THE BREACH OF ANY WAR RANTY SHALL BE COMMENCED BY THE BUYER ANY
20. Lill moore DCA INDUSTRIES Direct Current Alarm USER S MANUAL August 2012 No 192 701 00 H 2012 by Moore Industries International Inc Table of Contents Introduction Description Calibration Installation Maintenance AS DELIVERY Mu uN 16650 Schoenborn Street x Sepulveda California 91343 U S A United States Canada 74 818 894 7111 Tix 65 1322 TOLL FREE FAX 818 891 2816 1 800 999 2900 CONNECT MacNet MIISEPULVEDA 1 Lloyds Court Manor Royal Crawley United Kingdom W Sussex RH10 2QU United Kingdom FREE PHONE ter 0293 514488 e Tix 87667 0800 525107 FAX 0293 536852 Australia 3 18 Resolution Drive Caringbah TOLL FREE New South Wales 2229 Australia 008 251928 Tel 02 525 9177 Tix 790 75914 FAX 02 525 7296 19 22 Moore Industries STAR Center has a wide variety of quality instrumentation in stock and ready to ship e Signal Transmitters e Temperature Transmitters e P I and I P Converters e Isolators and Converters e Indicators and Displays e Alarm Trips e Integrators and Totalizers e Power Transducers e Instrument Power Supplies e Racks Rails and Enclosures Most instruments can be customized to meet your needs Even then you ll never have to wait more than a few days Ask for the STAR Center Moore Industries J R CENTER Support Technical Assistance and Repair our Quick Ship Facility Introduction
21. Normally Closed NC or any combination of NO NC configurations during installation Fail safe Non fail safe configuration factory set Refer to table 1 for available combinations Double pole double throw DPDT form 2C and 7 5 A relays available as options See Note 3 24 or 45 Vdc 10 5 watts nominal 100 117 200 220 or 240 Vac 10 50 60 Hz AC power inputs not available with PC style housing Performance Repeatability Trip point settings repeat within 0 1 of span Dead Band 1 of span standard Adjustable Dead Band Option available Alarm Response 50 milliseconds for step change of 1 of span Line Voltage Effect 0 005 per 1 line voltage change ac or dc Isolation No galvanic path between input output and power Accuracy Front panel potentiometers capable of setting trip points from 0 to 100 of span Lockable scaled vernier dials optional Effect of Ambient Temperature on Performance Less than 0 018 per C through the specified range Less than 0 01 per F Environmental Ratings NOTES Ambient Operating Temperature 18 to 65 C 0 to 150 F 1 One of the available resistors MUST be installed 2 Requires extra engineering when used with some option combinations 3 DPDT not available with some enclosures and option combinations Page 4 DCA For a complete list of available options and for information on other housings mounting hardware and enclosures contact your
22. O J 3 o SINS 9 Q 9 oY N Ti WA A MOUNTING FLANGES I 7 LNO LOWER RELAY NORMALLY OPEN ONE POWER CONNECTION L j 4 Nc LOWER RELAY NORMALLY CLOSED E COMMON a OPTION TX REF 3 N CURRENT OR VOLTAGE INPUT 10 IN CURRENT OR VOLTAGE INPUT ONE TERMINAL STRIP PER 13 UNO UPPER RELAY NORMALLY OPEN CARD POSITION LSU lell 1 UNC UPPER RELAY NORMALLY CLOSED A COM COMMON NOTES 1 Rack is shown with protective covers removed 2 Power is not applied to each PC connector strip but to the rack terminal strip Power is supplied to the PC DCA at its pins 8 DC and 9 DC Figure 5 Terminals Labeling the PC DCA in the SMR Page 10 DCA lolol amp g ONE TERMINAL STRIP PER CARD POSITION lel 8 SINI LNO LOWER RELAY NORMALLY OPEN LNC LOWER RELAY NORMALLY CLOSED COM COMMON IN UPPER ALARM CURENT OR VOLTAGE INPUT IN LOWER ALARM CURRENT OR VOLTAGE INPUT IN CURRENT OR VOLTAGE INPUT UNO UPPER RELAY NORMALLY OPEN UNC UPPER RELAY NORMALLY CLOSED COM COMMON Figure 6 PC DCA with DI Option Terminal Locations Setup of DCA s in Explosion proof Enclosures The DCA in an explosion proof enclosure EX in corporates a modification of the STD housing where the connection terminals are replaced with pin
23. afford full 0 to 100 percent adjustabil ity over the unit s specified span Each installed relay is wired to a front panel LED which lights when the relay is energized Depending upon the type of relay ordered i e fail safe non fail safe a lit LED can indicate either an alarm or a non alarm input condition Table 1 summarizes the alarm type LED status options for the available types of DCA Page 2 DCA LOW ALARM DCA 100 p HIGH ALARM DCA 100 k RESET aaa TRIP POINT ANALOG N DEAD BAND ANAIS DEAD BAND VALUE N RESET VALUE a Pas TRIP POINT 0 A 0 o TIME TIME FAIL SAFE RELAY ENERGIZED LED ON FAIL SAFE RELAY DE ENERGIZED LED OFF Figure 1 High and Low alarm Relay Configurations Table 1 DCA Alarm Types Model Number iii This Unit signals an ts LED will be Designator This Unit is Alarm condition when Single Alarm Only one relay installed Dual Alarm Two relays are installed High Fall Saf Input increases and exceeds OFF in alarm DE energized in alarm igh Fail Safe Trip Point See Note 2 ON in Non alarm Energized in Non alarm g Input increases and exceeds ON in Alarm Energized in Alarm High NON Fall Safe Trip Point See Note 2 OFF in Non alarm DE energized in Non alarm Input decreases and drops below Trip Point See Note 2 OFF in alarm DE energized in alarm ON in Non alarm Energized in
24. arranty we can use the unit s serial number to verify the warranty status for you over the phone Be sure to include the RMA number on all documentation Non Warranty Repair If your unit is out of warranty be prepared to give us a Purchase Order number when you call In most cases we will be able to quote you the repair costs at that time The repair price you are quoted will be a Not To Exceed price which means that the actual repair costs may be less than the quote Be sure to include the RMA number on all documentation Provide us with the following documentation a A note listing the symptoms that indicate the unit needs repair b Complete shipping information for return of the equipment after repair c Thename and phone number of the person to contact if questions arise at the factory Use sufficient packing material and carefully pack the equipment in a sturdy shipping container 4 Ship the equipment to the Moore Industries location nearest you The returned equipment will be inspected and tested at the factory A Moore Industries representative will contact the person designated on your documentation if more information is needed The repaired equipment or its replacement will be returned to you in accordance with the shipping instructions furnished in your documentation WARRANTY DISCLAIMER THE COMPANY MAKES NO EXPRESS IMPLIED OR STATUTORY WARRAN TIES INCLUDING ANY WARRANTY OF MERCHANTABILITY OR OF F
25. heck of basic unit operations is recommended however in order to identify any damage to the unit that may have oc curred during shipping This also allows the user to effect operational adjustments to trip point settings and unit dead band if available It is recommended that the procedures in this section be carried out at a technician s bench or in a similar lab environment This is the safest means of making adjustments to trip point values isolated from the intended DCA application The calibration of the DCA consists basically of setting trip points and dead bands based on the resistance across the unit contact closure terminals as measured by an ohmmeter With relay contacts closed resistance is negligible With relay contacts open resistance is infinite EXAMPLE Unit Type o Input Page 5 DGA DCA 4 20MA DH1L1 117AC AD STD Relay Configuration Power Options s Housing Basic Calibration Setup Be sure to use calibrated test equipment when performing the bench check and calibration of the The equipment listed in table 3 is needed for calibrat DCA The use of inaccurate test equipment may ing the DCA These items are not supplied with the result in unreliable settings for the unit s trip point s unit but should be available in most testing labs etc Voltage or Current Source Table 3 DCA Calibration Equipment Specifications Calibrated adju
26. iate to DCA If high alarm is configured as fail safe H1 in model number verify that appropriate LED for that alarm is lit LED for non fail safe low alarm H2 in model number will not be lit Note ohmmeter reading In a high alarm 0 input is a non alarm condi tion If connected to XNO and COM terminals X U or L UPP or LOW NO normally open Resistance across the terminals in a fail safe alarm is zero In anon fail safe alarm resis tance will be near infinite If connected to XNC and COM terminals resis tance is infinite in fail safe zero in non fail safe alarms Set input to desired high alarm trip point level Turn appropriate high alarm adjustment pot may be labeled UPPER or LOWER slowly clock wise Observe LED and ohmmeter and stop turning at exact point where relay changes state Vary pot setting slightly above and below trip point to zero in on exact setting If high alarm is configured as fail safe H1 in model number verify that appropriate LED for that alarm is not lit LED for non fail safe high alarm H2 in model number will be lit Verify desired setting by varying input above and below trip point level from step 6 and observing both LED and ohmmeter to confirm change of relay state at or above trip point setting NOTE Units equipped with any Manual Reset Option have external push buttons that must be pressed to reset the relays once they have been tripped Page 16
27. in table 2 4 Turn ZERO pot clockwise until both UPPER and LOWER alarms trip 5 Apply 100 input to setup 6 Turn UPPER and LOWER pots clockwise to 10 0 setting 7 Turn internal FSA pots fully counterclockwise High alarm will change state Disregard low alarm at this time 8 Turn FSA pot for UPPER alarm slowly clock wise observing ohmmeter and appropriate front panelLED 9 Set FSA pot stop turning at exact point at which high alarm is tripped If high alarm is configured as fail safe H1 in the unit model number verify that appropriate LED for high alarm is not lit The LED for a non fail safe high alarm H2 in the model number will be lit 10 Disconnect ohmmeter and reconnect it to LOWER alarm section of DCA 11 With input at 100 and ohmmeter connected to LOWER alarm section of unit turn appropriate LOWER FSA pot fully clockwise Note that low alarm trips 12 Turn LOWER FSA pot slowly clockwise observ ing ohmmeter and appropriate front panel LED 13 Set FSA pot stop turning at exact point at which low alarm is tripped If low alarm is configured as fail safe L1 in the unit model number verify that appropriate LED for low alarm is not lit The LED for a non fail safe low alarm L2 in the model number will be lit 14 Alternate the input between its rated 0 and 100 level verifying the setting of the unit s front panel pots 0 00 at
28. lace of dead band MR equipped units return to normal only when the process input returns to non alarm state and the external reset push button is pressed TT Option Lockable Vernier Dial Front panel multiturn potentiometers for setting and locking trip points Includes front panel ZERO potentiometer for appropriate offsets TX Option Two wire Transmitter Excitation Rated at 30 Vdc 25 mA 7 5A Option 7 5 amp Relay s Rated by CSA and UL at 7 5 amps 28 Vdc or 120 Vac Model Serial Number Moore Industries uses a system of unit model and serial numbers to keep track of factory configuration and options for each DCA shipped and serviced The example outlines the significance of each field of information in a typical DCA model number Refer to table 1 for an explanation of the relay configuration codes used If service information or assistance for a DCA is needed make a note of the unit s model and serial number before contacting Moore Industries Customer Service Department Our highly skilled technicians will be happy to assist you STD units serial and model numbers are located on an L shaped metal tag at the top of the connection terminal strips On PC DCA s the numbers are located on an adhesive label affixed to the side of the front panel Calibration Every DCA shipped from the factory is manufactured and tested according to Moore Industries exacting standards for product quality A bench c
29. ntil input returns past dead band setting The DCA dead band can be expressed as a percent age of the unit s factory configured span For Example A single high alarm DCA rated for 4 20 mA input is required to have a 25 dead band around its 14 mA trip point setting To calculate the input level needed to set the desired dead band subtract 25 of 16 mA span from 14 mA Trip point setting in mA 14 25 of input span in mA 16 0 25 14 4 10 The result 10 mA is the level of input to be applied in step 2 The DCA in this example will signal an alarm condition when the input reaches or exceeds 14 mA but will not reset until the input drops below 10 mA Calibrating TT equipped Units Lockable multiturn trip point adjustment pots on the front panel of each TT equipped DCA are set at the factory so that 0 00 on the dial is equal to 0 of the application s rated input span 10 00 is equal to 100 of span The accuracy of these settings is 0 5 of the rated span Calibration of DCA s with this option consists of two procedures First the internal Full Scale Adjust FSA potentiometer s must be set this involves some disassembly of the STD DCA Then the unit zero trip points and dead band if so equipped must be set Figure 13 shows the location of the STD DCA FSA potentiometers Figure 14 shows the location of the pots on the PC style unit Refer to figure 10 when disassembling the unit in STD
30. of the wire Protective Earth Conductor The Protective Earth Conductor shall be of equal or larger size wire than the other two power conductors The Protective Earth Conductor shall be the first conductor connected to the unit when the unit is be ing wired It shall be the last conductor removed when the unit is being un wired Page S 2 Supplement Maximum Working Voltage Symbols Table 1 s shows the maximum working voltage for Table 2 s shows the symbols used on Moore Indus Moore Industries low voltage products tries products the corresponding IEC ISO symbol and its definition Table 1 s Maximum Working Voltage Table 2 s Symbols on Moore Industries Products Input Type Maximum Working Voltage ns Symbol on Millivolt Thermocouple and RTD 48Vdc IEC ISO Moore E Definition DC Voltage Inputs 48Vdc Symbol Industries Product AC Voltage Inputs 264Vac Analog Outputs 48Vdc PS Relay Contacts 264Vac PS Direct Current DCC 117Vac Power Terminals 129Vac 240Vac Power Terminals 264Vac Contact Closure Outputs 30Vdc Alternating Current Accessories Contact Moore Industries for information on suitable accessories for our products AC or DC Direct and Alternating Current gt gt Q AG D Zz Protected Earth Terminal Mounting When mounting the unit or installing it into an appli cation ensure that the unit can be easily removed for maintenance or repairs Pro
31. ohmmeter and stop turning at exact point where relay changes state Vary pot setting slightly above and below trip point to zero in on exact setting If low alarm is configured as fail safe L1 in model number verify that appropriate LED for low alarm is not lit LED for non fail safe low alarm L2 in model number will be lit Verify desired setting by varying input above and below trip point level from step 6 and observing both LED and ohmmeter to confirm change of relay state at and below trip point setting NOTE Units equipped with any Manual Reset Option have external push buttons that must be pressed to reset the relays once they have been tripped Setting High Alarm Trip Points Remember that the UPPER and LOWER labeling on the DCA is for reference purposes only The DCA can be ordered without high alarms as in a low low configuration Dual alarm units on the other hand can be ordered with either one or both relays configured as high alarms Refer to the unit s model number to determine the alarm configuration and perform the following proce dure for each installed high alarm il Check model number to verify correct power input and apply 117 or 240 Vac 24 or 45 Vdc as appropriate Make sure that ohmmeter in calibration setup is connected to appropriate NO or NC terminals as desired Page 15 DCA Apply 0 of application s input span current or voltage as appropr
32. onduit to or from the DCA WARNINGS Do not apply power to the DCA until all connections are secure The uncovered power input terminals of ac powered STD DCA s present an electric shock hazard Always turn off the power to the unit before servicing Page 21 DCA 153 7 mm e 6 03 ir mn I agin 5 23 in Ooh PONENT m7 nn SIDE bir l Ale D u T A l E z Figure 16 PC DCA Outline Dimensions SEE NOTE 2 CURRENT OUT OR VOLTAGE ALARM SOURCE DCA com INDICATOR OUT VDC or VAC POWER SOURCE SEE NOTE 1 NOTES 1 Check the model number for power source requirements 2 X U for upper alarm section high or low or L for lower alarm section high or low NO normally open NC normally closed Figure 17 DCA Installation Hookup Page 22 DCA PC DCA s slide into card slots in Moore Industries nineteen inch card racks the SMR and RMR Each DCA has individual contacts on its rear edge that mate with an edge connector at the back of the rack Maintenance Once the DCA is properly calibrated and installed it will operate indefinitely No further adjustments should be necessary unless the unit is moved or the process input changes It is recommended that the unit terminals be checked periodically for signs of oxidation or looseness If a problem develops with the performance of the DCA remove the unit from service and recalibrate Refer to the
33. s on the unit bottom panel These pins are inserted in a terminal block permanently mounted inside the base of the explosion proof enclosure To effect the calibration connections unscrew the top of the enclosure and pull the DCA up and out of the enclosure base exposing the terminal block Figure 7 shows the block and its labeling Figure 8 shows the labeling used for units equipped with the DI Option Use the appropriate terminal locations figure to connect the calibration equipment to the terminal block in the enclosure base Then re connect the DCA by aligning the pins on the bottom of the unit housing with the holes in the terminal block Press down until the unit is seated firmly in the enclosure base CAUTION The EX DCA housing fits into the terminal block in its correct orientation only Note the position of the connection key Attempting to force the unit in when the pins are not aligned with the correct holes will bend the pins Basic Calibration Hookup Use the terminal loca tions figure that is appropriate for the type of DCA being checked and connect the equipment described in the calibration equipment table as shown in the calibration hookup diagram figure 9 Set all low alarm pots fully counterclockwise DCA pots are equipped with slip clutches to prevent damage in the event of over turning A slight change in torque may be felt when a wiper stop is reached If unable to sense the stop set pot 15 turns
34. stable unit capable of output at discrete levels in the appropriate range with the rated impedance for the unit being calibrated EDC Models MV105 MV155 or equivalent Power Source AC or dc power input appropriate for the type of DCA being calibrated Refer to table 2 earlier in this manual Ohmmeter Accuracy of 1 minimum Screwdriver Slotted tip with head width no greater than 2 54 mm 0 01 in Wire Jumpers required for AR equipped DCA s ONLY Temporary jumper wiring suitable for shorting AR Option diodes so that the alarm delay may be defeated while adjusting the unit s trip point settings Extender Card optional for use with PC style DCA s ONLY Moore Industries part number 350 513 00 Page 6 DGA Setup for the STD DCA Figure 2 shows the labeling To access the connection terminals for a DCA in the used on the front panel of the STD DCA Figure 3 basic extruded housing STD AB etc use a screw shows the terminals on a unit equipped with DPDT driver to remove the securing screw from the protec relays tive plastic cover on the unit front panel With the screw removed the cover can be removed by hand revealing the terminals and the labels depicted in the illustrations in this manual imoore INDUSTRIES DC DC CURRENT ALARM UPPER LOWER O x09 UPPER RELAY NORMALLY OPEN UNO LNO LOWER RELAY NORMALLY OPEN
35. tective Conductor Terminal Equipment protected throughout by double insulation or reinforced insulation equivalent to Class II of IEC 536 Maintenance on Moore Industries products is limited to keeping the unit clean and the wire terminals free of oxidation This is best accomplished by install ing the unit in an area protected from dust heat moisture and corrosive atmospheres Yearly visual IN Positive Input Caution See manual for information ale Cleaning and Maintenance Oo s i ot Specified inspections should be performed to ensure that the PERN Negative Input unit is clean and the electrical connections are in Positive Outpdt good repair ehepeelited OUT Negative Output Normally Open ot Specified Normally Closed Common Replacement of Not Specified UNO Upper Normally Open Consumable Materials UNC Upper Normally Closed No consumable materials are used in the Moore p LNO Lower Normally Open Industries products covered by EN 61010 1 otapeciied LNC Lower Normally Closed ot Specified TX Transmitter Excitiation OZ Z 5 L zoo S Zz The Interface Solution Experts 4 Declaration of Conformity CE EMC Directive 89 336 EEC e Manufacturer s Name Moore Industries International Inc Manufacturer s Address 16650 Schoenborn Street North Hills CA 91343 6196 USA Declares that the product s e Product Name DCA MODEL INPUT OUTPUT POWER OPTIONS HOUSING e Model Number s DCA CE
36. the unit or when the unit is operating and the LED is NOT lit Since each LED illuminates only while the corresponding relay is energized when the LED is not lit its corresponding relay is de energized So regardless if the DCA is configured for fail safe or non fail safe operation each relay s normally open or normally closed contact states are true as labeled only when the relay is de energized Addition The hookup connections for units configured with the TX Opton are not provided in the Installation Section of the user s manual For units with the TX Option connect the positive output lead from the external equipment to the TX terminal on the DCA and con nect the minus output lead from the external equip ment to the IN terminal of the DCA Do not use the IN when installing DCA s with the TX Option Supplement Low Voltage Directive The following guidelines must be followed in order to comply with EN 61010 1 Low Voltage Directive These items affect the AC versions of the following products DCA DPS 240 DPS1200 ECA ECS ECT FCA FDT IST PIT 4W PWT RBA SCT SMP SPA CE If these products are to be used in a non CE environment this supplement may be disregarded WARNING If this unit is used in a manner not specified by Moore Industries the protection provided by the equipment may be impaired Switches and Circuit Breakers A switch or circuit breaker must be wired in series with the AC power conductors
37. tions The relays used are single pole double throw form C There area number of input ranges and alternate relay ratings available Operationally the unit can be ordered with any com Page 1 DCA bination of single dual high low fail safe or non fail safe alarm relays The following paragraphs describe each of these configurations High Alarm Low Alarm A DCA configured as a high alarm is tripped when the input increases and reaches a customer set trip point A low alarm unit is tripped by a decreasing input that drops below a customer set trip point Figure 1 illustrates the concept Fail safe Non fail safe A fail safe unit s relay is energized when input is within a safe range i e is normal or notin an alarm condition When the input goes into an alarm condition reaching a trip point or losing power the relay of a fail safe DCA is de energized Conversely a non fail safe unit s relay is de energized when input is within the customer specified safe range and is energized when the input reaches the trip point setting Figure 1 also depicts the action of fail safe relays Controls and Indicators Every type and configuration of DCA comes with potentiometers pots to set the alarm trip points of each installed relay Additional pots for controlling unit dead band are available as an option and preci sion ten turn vernier scales can be used instead of the standard pots Trip point pots
38. unit s model number to verify that the correct power supply and input simulator is being used Make sure that the appropriate connections are made as shown in the figures of the preceding section Using the Calibration Procedures The Calibration Procedures section is divided into subsections that describe first low alarm then high alarm trip point setting The procedure for calibrating the DCA dead band for units equipped with the AD Option should be conducted after the trip points are set If the DCA to be calibrated is equipped with the TT Option skip to and complete the procedure in the section entitled Calibrating DCA s Equipped with the TT Option Figure 10 STD DCA Disassembly Page 13 DCA FOR DUAL ALARM PC DCA SHORT AROUND THESE DIODES FRONT PANEL FOR SINGLE ALARM PC DCA SHORT AROUND THIS DIODE Figure 11 AR Option Diodes on the PC DCA CONNECTOR PINS Page 14 DCA LED S PC2 gt PC1 FOR SINGLE ALARM STD DCA SHORT AROUND THIS DIODE FOR DUAL ALARM STD DCA SHORT AROUND THESE DIODES Figure 12 AR Option Diodes on PC1 of the STD DCA Setting Low Alarm Trip Points Remember that the UPPER and LOWER labeling on the DCA is for reference purposes only The
39. with the DPDT option Always try to install the DCA in an area relatively free of dust excessive moisture or corrosives Contact your Moore Industries Sales Representative for information on other types of DCA housings enclosures and mounting hardware Making Electrical Connections Figure 17 illustrates the installation hookup for the unit Refer to the terminal location figures in the Calibration Section when making the electrical connections associated with installing the DCA Though there is no special wiring required for standard connections the use of shielded twisted wiring is recommended for all low level signals or where connecting leads are run close to other services such as power wiring Ground the shield wire as close to the DCA as possible in the installation Page 20 DCA 76 2 mm 9 5 mm 3 00 in Z 0 38 in Be viva 2 60 in D CA DC CURRENT ALARM UPPER LOWER 167 mm 6 56 in 2 49 in 95 mm 3 75 in 102 mm 4 00 in 76 2 mm 3 00 in 63 5 mm 2 50 in Figure 15 STD DCA Outline Dimensions Including DPDT Option When making the electrical connections for units in explosion proof enclosures route the wiring through the conduit hubs in the enclosure with enough slack to reach the appropriate terminal Units in oil or water tight NEMA enclosures require the use of Myer Scru Tite or equivalent fittings to maintain the enclosure integrity when routing wiring c
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