Specifications
56  Monitor ISM/xL™ Hardware Guide 
22-0375 rev1.1 
Appendix “A” 12VDC Relay 
Dimensions: 1&3/8” (3.5cm) wide X 2&3/8” (6.0cm) long X 1&1/16“ (2.7cm) high. 
Power:
 12VDC, 8.5 mA active current rating. 
Terminal Connections: 
1. Normally Closed 
2. Normally Open 
3. Common 
4. Positive Trigger 
5. Negative 12VDC 
6. Positive 12VDC 
7. Negative Trigger 
Features:
•  Form “C” contact. 
•  Contact will change state when 12VDC applied to Pos. pin 6 and Neg. pin 5 and there is a wire short between 
Pos. pin 6 and Pos. Trigger pin 4. 
•  When continuously powered by 12VDC, will change state when: 
−  Low voltage trigger applied to Pos. Trigger pin 4 (greater then 3VDC, approximately 130 micro amps). 
−  A negative supply is applied to Neg. Trigger pin 7. 
−  On board red LED turns on when relay activated. 
Appendix “B” Wiring Specifications 
• Earth Grounds:  
Recommended:
 18 AWG, stranded & insulated; 
Good:
 Standard 22 AWG quad cable (use all 4 wires). 
• Module Bus (RS485) Cabling (device comms & power): 
Recommended:
 24 AWG, 4 conductors, Shielded Twisted Pair, 
120 
Ω impedance, low capacitance, 41 pF / meter or 
  12.5 pF / foot (such as Belden 9842). 
ULC
: 22 AWG, 4 conductors, Shielded Twisted Pair, low capacitance. 
For regions that require CE conformity, C-Tick conformity or the 
equivalent the recommended Module Bus cabling bus wire type 
must be used.
• Max. Length: Up to 610 m / 2000 ft. of cable on a Module bus port. 
• NOTE: For longer cable distances, and/or where many expansion 
  modules are connected on one cable (daisy chained, star wiring 
  configurations are not acceptable) a 150 Ω ‘terminating’ resistor 
  will need to be installed across A and B communication terminals 
  of the last module on the ‘bus’ cable. If necessary, add a second resistor at the panel end module bus A and B if it is confirmed 
that the panel connector is the “end of line” at that end. 
• Separate Power (or door strike) Wiring: 
Recommended:
 18 AWG, stranded & insulated 
(2 conductors; colour-coded is preferable); 
Good:
 22 AWG, 2 conductors, insulated. 
• Inputs/Sensor Cabling: 
22 AWG, 2-wires (For electrically noisy environments, use twisted pair, and/or shielded cable.) 
• Outputs/Signalling: 22 AWG, 2 conductors. 
• Reader Cabling: 24 AWG (ULC: 22 AWG), shielded (Max: 150 m / 500 ft.) 
Basic reader (no LEDs, buzzer control, or tamper)
: 4 Conductors; 
Reader with LED(s)
: 6 conductors; 
Reader with LEDs, plus buzzer and tamper
: 9 conductors. 
Modem/PC Link: Use kit provided, or 22/24 AWG low-cap cable (not reader cable). Shielded cable is recommended. 
RS485 (shared cable or modem): 3 wires, see Module bus spec. above.
Red LED turns
on when relay
activated.
12345
6
7
12V Relay
P/N 650-0912
NC
NO
COM
+ve Trig
-ve 12VDC
+ve 12VDC
-ve Trig
In 
non-energized 
state. 
Cabling P/Ns:
FT4
FT6
Module Bus (shielded) 
Preferred (24 AWG):  120-3401  120-3405 
ULC (22 AWG):  120-3408  120-3409 
Note: Max. distance may be reduced with the ULC cable. 
Reader cable (24 AWG shielded): 
6 Conductors:  120-3402  120-3406 
10 Conductors:  120-3403  120-3407 
Note: ULC requires 22 AWG shielded cable. 
Power (18 AWG):  120-3400  120-3404 
I/O
 (quad):  120-3410  120-3411 
Notice: Elevator controller and 
condominium keypad installations 
include unique power and cabling 
aspects. Always refer to the installation 
instructions provided with each device. 
Notice: Use minimum 26AWG UL/CSA/or 
equivalent approved telephone cable. 










