
52 Monitor ISM/xL™ Hardware Guide
22-0375 rev1.1
Input Point Expanders
VBUS
• VBUS is an internal communication bus that related VBUS modules are used with. The VBUS is not intended for external use. It
has been designed to be used in a protected enclosure with adjoining interconnection between modules in the same enclosure.
It communicates with the main control over the Module Bus (SNAPP) which is for external communications.
• VBUS and VBUS modules allow the system to be expanded without adding additional modules on the main Module Bus
(SNAPP).
16 Point Expander
Master Unit (P/N 650-3646)
16 Point Input
Expander Board
Data A
Data B
1432
312
0V
IN9
0V
TB12
TB5
TB3
TB7
TB4
312 312 312
TB1
TB6
(+)
12V IN
IN10
0V
IN11
IN12
IN13
0V
IN14
IN15
0V
IN16
312
0V
IN8
312 312
IN7
0V
IN6
IN5
IN4
0V
IN3
IN2
0V
IN1
(+)12VDC
0V
VBUS
312
312
312
OP2
0V
OP1
12
0V
Tampr
12
0V
12VDC
Auxiliary
TB11
TB2
TB13
TB10
TB9
TB8
Aux
r
e
d
b
l
a
c
k
y
e
l
l
o
w
g
r
e
e
n
Module Bus
(SNAPP)
5 digit serial number
to program in Module
Programming
XXXXX
(+)
Not used
Tamper
Spring
Rear Tamper
on back of
board.
P1 IN
Disables
Wire short to disable rear tamper.
OP1 OP2
LEDs
LEDs
Power
VBUS Active
Processor OK
green
yellow
green
Ratings:
Input:
12VDC, 100mA
Output:
12VDC, 2x10mA
NOTE:
8 or 16 Point Expander has plastic plug holding Rear
Tamper in. Remove plug for rear tamper protection.
For more information, see
Point Expander Installation
Instructions 21-3615.
See the following Module Power Supply for a further description of the same Rear Tamper assembly.
8 Point Expander
VBUS Unit (P/N 650-3642)
Refer to Installation Instructions P/N 21-3615 for further information.
8 Point Input Expander
TB12
TB5
TB3TB4
TB6
312
0V
IN8
312 312
IN7
0V
IN6
IN5
IN4
0V
IN3
IN2
0V
IN1
(+)12VDC
IN
0V
VBUS
312 312
P4
P3
P2
Processor OK LED
(with VBUS = slow flash)
(no VBUS = quick flash)
This unjumpered
connector for
factory use only.
Do not jumper.
Ratings:
Input:
12VDC, 35mA
Temp:
-10°C to +55°C
(14°F to 131°F) @ 93%
Refer to Installation Instructions P/N 21-3615 for further information.
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