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DCA

Page 17

RELAY

RELAY

PC 1

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

(SINGLE ALARM ONLY)

LOWER FULL-SCALE
ADJUSTMENT (DUAL ALARM ONLY)

Figure 14.

Location of the FSA Potentiometers on the PC DCA

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Summary of Contents for DCA D

Page 1: ...DCA Direct Current Alarm USER S MANUAL May 2016 No 192 701 00 K 2012 by Moore Industries International Inc...

Page 2: ...sistance andRepair ourQuick ShipFacility Moore Industries CENTER United States Canada TOLLFREE 1 800 999 2900 United Kingdom FREE PHONE 0800525107 Australia TOLL FREE 008 251928 16650 Schoenborn Stree...

Page 3: ...of input ranges and alternate relay ratings available Operationally the unit can be ordered with any com bination of single dual high low fail safe or non fail safe alarm relays The following paragrap...

Page 4: ...talled H1 High Fail Safe Input increases and exceeds Trip Point See Note 2 OFF in alarm ON in Non alarm DE energized in alarm Energized in Non alarm H2 High NON Fail Safe Input increases and exceeds T...

Page 5: ...onfigurations 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 opti...

Page 6: ...d locking trip points Includes front panel ZERO potentiometer for appropriateoffsets 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...

Page 7: ...e 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 num...

Page 8: ...ved by hand revealing the terminals and the labels depicted in the illustrations in this manual Figure 2 STD DCA Terminal Locations NOTES 1 Each unit is factory configured for ac or dc power 2 Each un...

Page 9: ...t both inputs share the IN terminal UPPER RELAY 1 NORMALLY CLOSED UNC1 IN CURRENT OR VOLTAGE INPUT IN CURRENT OR VOLTAGE INPUT LNO1 LOWER RELAY 1 NORMALLY OPEN COM COMMON LNC1 LOWER RELAY 1 NORMALLY C...

Page 10: ...ether 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 supp...

Page 11: ...N CURRENT OR VOLTAGE INPUT 13 1 15 COM COMMON UNC UPPER RELAY NORMALLY CLOSED COM COMMON UNO UPPER RELAY NORMALLY OPEN ONE TERMINAL STRIP PER CARD POSITION NOTES Power is not applied to each PC connec...

Page 12: ...own 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...

Page 13: ...NORMALLY OPEN LNO COMMON COM LOWER RELAY NORMALLY CLOSED LNC CURRENT OR VOLTAGE INPUT IN CURRENT OR VOLTAGE INPUT IN OPTION TX FOR TRANSMITTER EXCITATION REF FOR DEVIATION ALARM 7 8 9 10 11 12 6 5 4 3...

Page 14: ...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 dio...

Page 15: ...13 Figure 10 STD DCA Disassembly RELAY RELAY FOR SINGLE ALARM PC DCA SHORT AROUND THIS DIODE CONNECTOR PINS FRONT PANEL FOR DUAL ALARM PC DCA SHORT AROUND THESE DIODES Figure 11 AR Option Diodes on th...

Page 16: ...is connected to appropriate NO or NC terminals as desired 3 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 ve...

Page 17: ...priate 2 Make sure that ohmmeter in calibration setup is connected to appropriate NO or NC terminals as desired 3 Apply 0 of application s input span current or voltage as appropriate to DCA If high a...

Page 18: ...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...

Page 19: ...ALE 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 SINGLE ALARM ONLY LOWER...

Page 20: ...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 appro...

Page 21: ...eference is at 12 mA and input 2 is at 14 mA the low alarm relay will indicate an alarm Installation Installing the DCA is typically accomplished by physically mounting the unit then effecting the ele...

Page 22: ...ts in explosion proofenclosures routethewiringthrough 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...

Page 23: ...N VDC or VAC POWER SOURCE SEE NOTE 2 NOTES 1 2 XNO COM Check the model number for power source requirements X U for upper alarm section high or low or L for lower alarm section high or low ALARM INDIC...

Page 24: ...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...

Page 25: ...stand 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 the unit or whe...

Page 26: ...ept for terminals with the RF option These terminals are rated CAT I Equipment Ratings Moore Industries transmitters do not generate haz ardous voltages They measure voltage or current inputs and gene...

Page 27: ...4 s t c a t n o C y a l e R c a V 4 6 2 s l a n i m r e T r e w o P c a V 7 1 1 c a V 9 2 1 s l a n i m r e T r e w o P c a V 0 4 2 c a V 4 6 2 s t u p t u O e r u s o l C t c a t n o C c d V 0 3 Pag...

Page 28: ...OR 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...

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