May 25, 2005 6881096C74-B
2-6 Product Overview: Control-Head Assembly
2.3.2.5 VIP Output Connections:
There are three VIP outputs that are used for the W9 control head and two VIP outputs for the W3,
W4, W5, and W7 control heads. The VIP outputs are normally at SWB+ levels and are driven low by
logic within the control head for both the dash- and remote-mount configurations. Field programming
of the radio can define the functions of these pins. The output transistors that drive the VIP outputs
can sink 300 mA of current and are primarily used to control external relays. These relays should be
connected between the respective VIP output pin and switched B+.
VIP outputs are controlled by SB9600 Update_Indicator messages. Therefore, multiple indicators
and their status information can be sent with a single message.
The relay can be normally ON or normally OFF depending on the configuration of the VIP outputs.
The CPS can be used to program the function of these VIP outputs in the radio.
The following are typical applications currently supported with ASTRO products:
• Horn relay
• Light relay
• Siren horn transfer
2.3.2.6 VIP Input Connections:
There are three VIP inputs that accept inputs from switches. VIP input messages are sent via the
SB9600 pins as SB9600 BUTCTL messages. One side of the switch connects to ground while the
other side connects to a buffered input to the control head. The switch can be normally closed or
normally open depending on the configuration of the VIP inputs. The CPS can be used to program
the function of these VIP inputs in the radio.
The following are typical applications currently supported in ASTRO products:
• Siren horn ring
• Auxiliary siren
For the remote configuration of W4, 5, 7 and 9 control heads, refer to sections 3.1.2 and 3.2.1 of the
Installation Manual, 6881096C72.
Table 2-1. Control-Head VIP Locations
Type
Configur
-ation
Power
Level
VIP Location
Number of
VIP Inputs
Number of
VIP Outputs
W3 Remote Midpower J3-3 and J3-12
Remote Mount Accessory Cable
HKN6096
None 2
W3 Dash Midpower J2-18 and J2-19
Rear Accessory Connector
None 2
W4 Dash Midpower J2-18 and J2-19
Rear Accessory Connector
None 2
W5 Dash Midpower J2-18 and J2-19
Rear Accessory Connector
None 2
W7 Dash Midpower J2-18 and J2-19
Rear Accessory Connector
None 2
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