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Moore Industries DCA S User Manual
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Moore Industries DCA S User Manual

Direct current alarm
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DCA
Direct Current Alarm
USER'S MANUAL
May 2016
No. 192-701-00 K
© 2012 by Moore Industries-International, Inc.

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Summary of Contents for Moore Industries DCA S

  • Page 1 Direct Current Alarm USER’S MANUAL May 2016 No. 192-701-00 K © 2012 by Moore Industries-International, Inc.
  • Page 2 Table of Contents Introduction Description Calibration Installation Maintenance Moore Industries’ STAR Center has a wide variety of quality instrumentation in stock and ready to ship. DELIVERY • Signal Transmitters • Temperature Transmitters • P/I and I/P Converters • Isolators and Converters •...

  • Page 3: Controls And Indicators

    Introduction safe alarm relays. The following paragraphs describe each of these configurations. Moore Industries’ Direct Current Alarm (DCA) is a highly versatile, fully adjustable device that is factory- High Alarm/Low Alarm. A DCA configured as a high configured to accept either current or voltage input.
  • Page 4 Page 2 LOW-ALARM DCA HIGH-ALARM DCA 100 % 100 % RESET TRIP POINT ANALOG ANALOG DEAD BAND DEAD BAND INPUT INPUT VALUE VALUE RESET TRIP POINT 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.
  • Page 5 Page 3 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 @ 200Ω...
  • Page 6 TX Option — Two-wire Transmitter Excitation. Rated information on other housings, mounting hardware, at 30 Vdc @ 25 mA. and enclosures, contact your Moore Industries Sales 7.5A Option — 7.5 amp Relay(s). Rated by CSA and Representative. UL at 7.5 amps, 28 Vdc or 120 Vac.
  • Page 7 Temporary jumper wiring suitable for shorting AR Option diodes so that the AR-equipped alarm delay may be defeated while adjusting the unit’s trip point settings. DCA’s ONLY) Extender Card (optional for use Moore Industries’ part number 350-513-00. with PC-style DCA’s ONLY)
  • Page 8 Page 6 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.
  • Page 9 Page 7 DC CURRENT ALARM UNO2 — UPPER RELAY #2 UPPER LOWER NORMALLY OPEN COM — COMMON ZERO UNO2 — UPPER RELAY #2 NORMALLY CLOSED UPPER RELAY #1 NORMALLY OPEN — UNO1 UPPER LNO1 — LOWER RELAY #1 NORMALLY OPEN COMMON —...
  • Page 10 As an alternative to using the card rack, individual PC connections to the “LOWER” labeled alarm section to DCA’s can be checked with Moore Industries’ Pro- be configured as a “high alarm”, and the “UPPER” cess Power Supply, the PPS, equipped with its CT section to be configured as a “low alarm”.
  • Page 11 Page 9 PC DC A INTERNAL RACK SLOT AND CONNECTOR PC DCA COMPONENT SIDE MOUNTING FLANGES LNO - LOWER RELAY NORMALLY OPEN ONE POWER LNC - LOWER RELAY NORMALLY CLOSED CONNECTION PER RACK COM - COMMON OPTION — +TX, +REF +IN —...
  • Page 12 Page 10 LNO - LOWER RELAY NORMALLY OPEN LNC - LOWER RELAY NORMALLY CLOSED COM - COMMON +IN — UPPER ALARM CURENT OR VOLTAGE +INPUT ONE TERMINAL STRIP PER +IN — LOWER ALARM CURRENT OR VOLTAGE + INPUT CARD POSITION -IN —...
  • Page 13 Page 11 LOWER RELAY NORMALLY OPEN — LNO COMMON — COM +DC — AC LOWER RELAY –DC — ACC NORMALLY CLOSED — LNC UNC — UPPER RELAY OPTION — +TX FOR TRANSMITTER NORMALLY CLOSED EXCITATION, +REF FOR DEVIATION ALARM CURRENT OR VOLTAGE COM —...
  • Page 14 Option, skip to and complete the procedure in the in its rack. Moore Industries offers an Extender Card section entitled “Calibrating DCA’s Equipped with the accessory for calibrating units under these circum- TT Option”.
  • Page 15 Page 13 Figure 10. STD DCA Disassembly FOR DUAL-ALARM PC DCA SHORT AROUND THESE DIODES FRONT PANEL CONNECTOR PINS FOR SINGLE-ALARM PC DCA SHORT AROUND THIS DIODE Figure 11. AR Option Diodes on the PC DCA...
  • Page 16 Page 14 LED’S RELAY RELAY FOR SINGLE ALARM STD DCA SHORT PC 2 AROUND THIS DIODE PC 1 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 3.
  • Page 17 Page 15 5. Set input to desired low alarm trip point level. 3. Apply 0% of application’s input span (current or voltage, as appropriate) to DCA. 6. Turn appropriate low alarm adjustment pot (may be labeled “UPPER” or “LOWER”) slowly clock- If high alarm is configured as fail-safe, H1 in wise.
  • Page 18 Page 16 Setting the Dead Band. See figure 1 for a graphic For Example : representation of the DCA dead band. The dead band A single, high-alarm DCA rated for 4-20 mA input is may be thought of as an “area” around a trip point in required to have a 25% dead band around its 14 mA which the alarm will not reset.
  • Page 19 Page 17 LED’S RELAY RELAY LOWER FULL-SCALE PC 1 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)
  • Page 20 Page 18 1. With the hookup described in the Calibration 12. Turn “LOWER” FSA pot slowly clockwise, observ- Setup Section complete, disable AR Option as ing ohmmeter and appropriate front panel LED. described in section titled “Calibrating AR- 13. Set FSA pot (stop turning) at exact point at which equipped DCA’s”.
  • Page 21 25% of span from the reference input. of dust, excessive moisture, or corrosives. Span = 16 mA Contact your Moore Industries Sales Representative 25% of 16 = 4 mA for information on other types of DCA housings, enclosures, and mounting hardware.
  • Page 22 Page 20 76.2 mm 76.2 mm 9.5 mm (3.00 in) (3.00 in) (0.38 in) 66 mm 63.5 mm (2.60 in) (2.50 in) DC CURRENT ALARM UPPER LOWER 186 mm ZERO (7.31 in) 167 mm 154 mm (6.56 in) (6.08 in) COVER 63.3 mm 6.4 mm...
  • Page 23 Page 21 Figure 16. PC DCA Outline Dimensions (SEE NOTE 2) CURRENT +OUT OR VOLTAGE ALARM SOURCE INDICATOR –IN –OUT – – VDC or VAC POWER SOURCE (SEE NOTE 1) NOTES: 1. 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.
  • Page 24 Page 22 PC DCA’s slide into card slots in Moore Industries’ It is recommended that the unit terminals be checked nineteen-inch card racks, the SMR and RMR. Each periodically for signs of oxidation or looseness. DCA has individual contacts on its rear edge that If a problem develops with the performance of the mate with an edge connector at the back of the rack.
  • Page 25 This supplement is being distributed to users of de-energized state of the relay. This means that the Moore Industries' Direct Current Alarm (DCA) to in- terminal labeling is true when power is removed from form them of corrections/additions to the current the unit or when the unit is operating and the LED is manual since its release date.
  • Page 26 SMP, SPA-CE. If these products are to be used in a non-CE environment, this supplement may Moore Industries alarms do not generate any hazard- be disregarded. ous voltages. Alarm contacts are wired in series with power sources and their intended loads.

  • Page 27: Cleaning And Maintenance

    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 v i l , t l – Accessories Contact Moore Industries for information on suitable accessories for our products.
  • Page 28 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.

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