Specifications
22-0375 rev1.1  Monitor ISM/xL™ Hardware Guide  53 
Jumper Selections P2 to P5 for 
8 Point Expander Board 
Slave Unit Address
Address Jumper P2
1
OUT
2 IN 
TEST  Not used 
Jumper 
P4 P3 
IN 
ON Leave in 
OUT 
OFF 
Transistor Output Expander 
VBUS Unit (P/N 650-3640) Refer to Installation Instructions P/N 21-3616 for further information. 
8 Transistor 
Output 
Expansion
TB5
TB2
TB4
TB3
TB1
312 312 312
0V
OP1
312
312
(+)12VDC
IN 
0V
VBUS
OP2
0V
OP3
OP4
0V
OP5
OP6
0V
OP7
OP8
P5
P4
P3
P2
Processor OK LED
(with VBUS = slow flash)
(no VBUS = quick flash)
Output LEDs turn on when 
outputs activated. Turn on/
off with P5 test jumper in. 
This unjumpered 
connector for factory use 
only. Do not jumper.
Ratings:
Input:
 12VDC, 135mA
Output:
 12VDC, 8x10mA
Temp:
 -10°C to +55°C (14°F to 
131°F) @ 93%
Relay Output Expander 
VBUS Unit (P/N 650-3641) Refer to Installation Instructions P/N 21-3616 for further information. 
8 Relay Output 
Expansion
TB5TB2 TB4TB3TB1
312 312 312 312
312
(+)12VDC 
IN 
0V
VBUS
312
312 312 312
TB6
TB7 TB8
TB9
P5
P4
P3
P2
This unjumpered 
connector for 
factory use only. 
Do not jumper.
Relay LEDs turn on 
when relays activated. 
Turn on/off with P5 
test jumper in. 
Processor OK LED
(with VBUS = slow flash)
(no VBUS = quick flash)
Ratings:
Input:
 12VDC, 155mA
Temp:
 -10°C to +55°C 
(14°F to 131°F) @ 93%
NC
COM
NO
NC
COM
NO
NC
COM
NO
NC
COM
NO
NC
COM
NO
NC
COM
NO
NC
COM
NO
NC
COM
NO
Transistor and Relay Expander Jumper Selections P2 to P5 
8 Point Expander Test Feature 
Apply power to an 8 point expander board. It can have an address and the 
VBUS connected or not. 
All inputs are left open with nothing connected to them. 
Insert the P4 test jumper. 
The “Processor OK” LED will flash at a slow rate. 
Short (bridge) each input with a piece of wire. E.g. between IN1 and 0V or IN2 
and 0V etc. 
The “Processor OK” LED will flash at a faster rate when each input is shorted 
(bridged). 
This will indicate that the inputs should function normally. 
Remove P4 after the test to return the 8 point expander board to normal 
operation. 
Address Jumpers P2 
–
 P
3
Slave Unit 
Address 
P2
P3
1
OUT
OUT
2 IN OUT 
3 OUT  IN 
4 IN  IN 
TEST 
(all outputs switch 
on and off) 
Not used 
Jumper 
P5 P4 
IN 
ON Leave defaulted 
OUT 
OFF 










