GAI-Tronics 12579-003 Monitored Relay Module (MRM) - Manual (Page 15)

Pub. 42004-716L2C
Model 12579-003 Monitored Relay Module Page 15 of 16
f:\standard ioms - current release\42004 instr. manuals\42004-716l2c.doc
05/12
Specifications
Electrical
Power requirements ................................................................................................................. 12 V dc 10%
Current draw ................................................. 1 amp maximum @ 12 V dc (does not include beacon power)
Number of output/input loops ..............................................................................................................8 loops
Maximum devices on output/input loop ................................. Limited by maximum current draw (Mode 0)
Unlimited (Mode 1)
One (Mode 2)
One (Mode 3)
Limited by maximum current draw (Mode 4)
Unlimited (Mode 5) (dry)
One (Mode 5) (wet)
Input/output ....................................................................................................................................... Power in
Power out
Page line (FSK) in
Page line (FSK) out
Eight field outputs/inputs
Data communications .............................................................................................................................. FSK
End-of -line device ............................................................................................................... 20 k
 (Mode 1)
5.1 k  in series with 15 k across contact (Mode 2)
5.1 k  in series with 15 k across contact (Mode 3)
20 k , 2-watt resistor (Mode 4 - up to 132 V ac/V dc)
None (Mode 5)
Field Outputs/Inputs
Mode 0
Maximum current draw (per output) ............................................................. 5 amps @ 24 V dc or 240 V ac
Maximum dc switching voltage ........................................................................................................ 150 V dc
Maximum ac switching voltage ........................................................................................................ 240 V ac
Mode 1
Contact closure resistance (activated) ................................................................................... 1 k
 maximum
Open fault detection ............................................................................................................ Minimum 65 k 
Ground fault detection ......................................................................................... Less than 200  to ground
Modes 2 and 3
Contact closure resistance (Mode 2: activated/ Mode 3: de-activated) ................................ 3 k
 maximum
Open fault detection ............................................................................................................ Minimum 65 k 
Ground fault detection ......................................................................................... Less than 200  to ground
Wire-to-wire short fault detection ........................................................................................ Less than 200 