W9 Control Heads; Vip Output Connections; Vip Input Connections - Motorola ASTRO W3 Service Manual

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3.4.2

W9 Control Heads

The VIPs allow the W9 control head to operate outside circuits and to receive inputs from outside the
control head. There are three VIP outputs that are used for relay control. There are also three VIP
inputs that accept inputs from switches. See the cable kit section for typical connections of VIP input
switches and VIP output relays.

3.4.2.1 VIP Output Connections

The VIP output pins are located on the back of the control head below the area labeled VIP. These
connections are used to control relays. One end of the relay should be connected to switched B+,
while the other side is connected to a software-controlled on/off switch inside the control head. The
relay can be normally On or normally Off depending on how the VIP outputs are configured. The
control-head connector P103 pins that are connected to the external relays are listed in
VIP Output
No.
1
2
3
The function of the VIP outputs can be defined by field programming of the control head. Typical
applications for VIP outputs are external horn/lights alarm and horn-ring transfer relay control.

3.4.2.2 VIP Input Connections

The VIP input pins are located on the back of the control head below the area labeled VIP. These
connections accept inputs from switches. One side of the switch is connected to ground while the
other side is connected to a buffered input to the control head. The switch can be normally closed or
normally open, depending on how the VIP inputs are configured. The control head provides three
VIP input connections. The control-head connector P103 pins that are connected to the external
switches are listed in
VIP Input
No.
1
2
3
The function of the VIP inputs is defined by field programming of the control head. Typical
applications for the VIP inputs are for a foot switch or a horn ring switch.
September 26, 2003
Table 3-7. VIP Output Connections
Switched VIP Output
B+ Pin No. Pin No.
18 2
19 1
35 34
Table 3-8 .
Table 3-8. VIP Input Connections
Switched VIP Output
B+ Pin No. Pin No.
20 4
21 3
36 37
Theory of Operation: Vehicle Interface Port (VIP)
Default Function Is Changed
with Field Programmer
Horn Relay (Alarm)
Light Relay (Alarm)
Siren-Horn Transfer
Default Function Is Changed
with Field Programmer
Siren; Horn Ring
Emergency (if option is present)
None
Table 3-7 .
6881096C77-O