6878215A01
4-8 Options and Accessories Installation Vehicle Interface Port Overview
4.3.2 VIP Input Connections
The VIP input pins are only available on the back of the control head (remote mount). These 
connections control inputs from switches. One side of the switch connects to ground while the other 
side connects to a buffered input on the control head. The switch can be normally closed (NC) or 
normally open (NO) depending on the configuration of the VIP inputs. There are three VIP input 
connections, as follows:
NOTE: Remote Mount requires the VIP cable to be attached to J400. 
 
MCH installations require the VIP inputs to be connected to the head assigned ID #1. See 
Section 2.2.2.5: “Setting the Initial Control Head ID” on page 2-29 for further information.
Table 4-2.  VIP Input Connections
VIP IN #
J400 J2
Ground Pin 
Number
On/Off Switched 
Pin Number
Ground Pin 
Number
On/Off Switched 
Pin Number
1       2 (green)  8 (white) NA NA
2       2 (green)      9 (orange) NA NA
3       2 (green)  10 (violet) NA NA
APX mobile radios equipped with the following features are capable of transmitting 
automatically, even if the radio is turned off:
• Automatic Vehicle Location
• Other Special Data Products
All APX mobile have accessory connector pins 14 and 15 connected together to allow 
the radio to power down. Opening this connection by REMOVING the accessory 
connector, or otherwise failing to maintain a normally closed path, could, if left 
unchecked, drain the vehicle battery, and possibly cause transmissions to occur.