
8 xL Simplified Installation Guide
21-3601E rev1.3
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).
Connecting 256 inputs on one main control board using VBUS
INPUT/OUTPUT EXPANDER CABINET
This box comes with either an 8 (950-3648) or 16 (950-3646) Input Master module. 8 Input (650-3642) or 8 Output (Transistor
Outputs: 650-3640, Relay Outputs 650-3641) VBUS slave boards can be added on the Master module’s VBUS connection.
INTELLIGENT POWER SUPPLY EXPANDER CABINET
Additional equipment will require additional power as the main control board will supply a maximum of 750mA auxiliary power for
modules, peripherals (e.g. motion, smoke sensors). Calculate the current used by each module (see module current rating chart in
Main Control Module diagram) and add the Module Bus (SNAPP) Intelligent 1 AMP Power Supply Expander Unit (North American
950-3650, European 950-3651) as required. A master 8 or 16 input module and 2 VBUS slave modules can be added to the power
supply unit in place of an input/output expander cabinet.
Main Control Board
12 Inputs
Module Bus (SNAPP)
16 Point Input Ex pander
1432
312
TB12
TB5 TB3
TB7
TB4
312 312 312
TB1
TB6
312 312 312 312312 312
12
12
TB11
TB2
TB13
TB10TB9TB8
Module
Bus
(SNAP P)
XXXXX
VBUS
8 Point Input Expander
TB12
TB5 TB3TB4TB6
312
0V
IN8
312 312
IN7
0V
IN6
IN5
IN4
0V
IN3
IN2
0V
IN1
312 312
P4
P3
P2
VBUS
8 Point Input Expander
TB12
TB5 TB3TB4TB6
312
0V
IN8
312 312
IN7
0V
IN6
IN5
IN4
0V
IN3
IN2
0V
IN1
312 312
P4
P3
P2
VBUS
8 Input Slave
8 Input Slave
16 Input Master
Distance: 609.6 meters (2000 feet) from main control.
Module Bus (SNAPP)
16 Point Input Expander
1432
312
TB12
TB5 TB3
TB7
TB4
312 312 312
TB1
TB6
312 312 312 312312 312
12
12
TB11
TB2
TB13
TB10TB9TB8
Module
Bus
(SNAP P)
XXXXX
VBUS
8 Point Input Expander
TB12
TB5 TB3TB4TB6
312
0V
IN8
312 312
IN7
0V
IN6
IN5
IN4
0V
IN3
IN2
0V
IN1
312 312
P4
P3
P2
VBUS
8 Point Inpu t Expander
TB12
TB5 TB3TB4TB6
312
0V
IN8
312 312
IN7
0V
IN6
IN5
IN4
0V
IN3
IN2
0V
IN1
312 312
P4
P3
P2
VBUS
8 Input Slave
8 Input Slave
16 Input Master
32 Inputs
32 Inputs
32 Inputs
16 Point Input Ex pander
1432
312
TB12
TB5 TB3
TB7
TB4
312 312 312
TB1
TB6
312 312 312 312312 312
12
12
TB11
TB2
TB13
TB10TB9TB8
Module
Bus
(SNAP P)
XXXXX
VBUS
8 Point Input Expander
TB12
TB5 TB3TB4TB6
312
0V
IN8
312 312
IN7
0V
IN6
IN5
IN4
0V
IN3
IN2
0V
IN1
312 312
P4
P3
P2
VBUS
8 Point Input Expander
TB12
TB5 TB3TB4TB6
312
0V
IN8
312 312
IN7
0V
IN6
IN5
IN4
0V
IN3
IN2
0V
IN1
312 312
P4
P3
P2
VBUS
8 Input Slave
8 Input Slave
16 Input Master
VBUS
16 Point Input Ex pander
1432
312
TB12
TB5 TB3
TB7
TB4
312 312 312
TB1
TB6
312 312 312 312312 312
12
12
TB11
TB2
TB13
TB10TB9TB8
Module
Bus
(SNAP P)
XXXXX
VBUS
8 Point Input Expander
TB12
TB5 TB3TB4TB6
312
0V
IN8
312 312
IN7
0V
IN6
IN5
IN4
0V
IN3
IN2
0V
IN1
312 312
P4
P3
P2
VBUS
8 Point Input Expander
TB12
TB5 TB3TB4TB6
312
0V
IN8
312 312
IN7
0V
IN6
IN5
IN4
0V
IN3
IN2
0V
IN1
312 312
P4
P3
P2
VBUS
8 Input Slave
8 Input Slave
16 Input Master
VBUS
32 Inputs
32 Inputs
16 Point Input Ex pander
1432
312
TB12
TB5 TB3
TB7
TB4
312 312 312
TB1
TB6
312 312 312 312312 312
12
12
TB11
TB2
TB13
TB10TB9TB8
Module
Bus
(SNAPP)
XXXXX
VBUS
8 Point Inpu t Expander
TB12
TB5 TB3TB4TB6
312
0V
IN8
312 312
IN7
0V
IN6
IN5
IN4
0V
IN3
IN2
0V
IN1
312 312
P4
P3
P2
VBUS
8 Point I nput Ex pander
TB12
TB5 TB3TB4TB6
312
0V
IN8
312 312
IN7
0V
IN6
IN5
IN4
0V
IN3
IN2
0V
IN1
312 312
P4
P3
P2
VBUS
8 Input Slave
8 Input Slave
16 Input Master
32 Inputs
16 Point Input Expander
1432
312
TB12
TB5 TB3
TB7
TB4
312 312 312
TB1
TB6
312 312 312 312312 312
12
12
TB11
TB2
TB13
TB10TB9TB8
Module
Bus
(SNAP P)
XXXXX
VBUS
16 Input Master
4 Inputs on
1 keypad
16 Point Expander Box
(950-3646). No VBUS
Slaves.
Module Bus (SNAPP)
= 256 Inputs
Module Bus (SNAPP)
ADDITIONAL POWER
This amount of equipment will require
additional power. Add the 1AMP North
American Intelligent Power Supply
Expander Unit 950-3650 or the
European version 950-3651 as required.
These boxes also have the capacity to
add 1, 8 or 16 Master Input module or 2
of either the VBUS 8 input or output
slave modules.
VBUS
VBUS
VBUS
12
TB1
12
TB2
312 4 312 4
TB5
312
TB6
Module
Bus
(SNAPP)
VBUS
12
TB7
TB3
TB4
P8
P7
P6
P5
P4
P9
P10
Module Power
Supply
XXXXX
12
312
Power
Supply
16 Point Input Ex pander
1432
312
TB12
TB5 TB3
TB7
TB4
312 312 312
TB1
TB6
312 312 312 312312 312
12
12
TB11
TB2
TB13
TB10TB9TB 8
Module
Bus
(SNAPP)
XXXXX
VBUS
16 Input Master
8 Input Slave
8 Point Inpu t Expander
TB12
TB5 TB3TB4TB6
312
0V
IN8
312 312
IN7
0V
IN6
IN5
IN4
0V
IN3
IN2
0V
IN1
312 312
P4
P3
P2
VBUS
8 Input Slave
North American
Power Supply
Expander: 950-3650
European: 950-3651
Power Supply
Expander unit
with a 16 Master
Input board and
2, 8 Input VBUS
Slave boards
added.
Module Bus (SNAPP)
Module Bus (SNAPP)
VBUS
VBUS
INPUT/OUTPUT
EXPANDER CABINET
INPUT/OUTPUT
EXPANDER CABINET
INPUT/OUTPUT
EXPANDER CABINET
INPUT/OUTPUT
EXPANDER CABINET
16 Inputs
INPUT/OUTPUT
EXPANDER CABINET
For further information, refer
to installation instructions:
Power Supply 21-3614
Input Modules 21-3615
Output Modules 21-3616
16 Point Input Ex pander
1432
312
TB12
TB5 TB3
TB7
TB4
312 312 312
TB1
TB6
312 312 312 312312 312
12
12
TB11
TB2
TB13
TB10TB9TB8
Module
Bus
(SNAPP)
XXXXX
VBUS
8 Point Inpu t Expander
TB12
TB5 TB3TB4TB6
312
0V
IN8
312 312
IN7
0V
IN6
IN5
IN4
0V
IN3
IN2
0V
IN1
312 312
P4
P3
P2
VBUS
8 Point I nput Ex pander
TB12
TB5 TB3TB4TB6
312
0V
IN8
312 312
IN7
0V
IN6
IN5
IN4
0V
IN3
IN2
0V
IN1
312 312
P4
P3
P2
VBUS
8 Input Slave
8 Input Slave
16 Input Master
32 Inputs
VBUS
P4
P3
P2
V
B
U
S
312
TB2TB1
312 312 312 12 312 312 312 312 312 312312
312 4 312 4
T B3 T B4 T B 5 TB 6 T B7 T B8 T B 9 T B1 0 T B1 1 T B1 2
TB13
TB14
SNAPP
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