NavCom SR-7120 Rev.A - Manual (Page 59)

Safari Network User Guide
3-13
Cable Connections and Wiring
When a Port Expander will not be used, such as when a
radio unit is mounted on a vehicle, refer to Table 3-4 for
pin assignments and associated cable wiring.
Radio Unit (NCU or Remote)
J1 Signal name Functions Cable wiring
Pin 1 GND Chassis Connect to chassis ground Black, 20 gauge
Pin 2 Ext Vin 9-36 V DC power in Red, 20 gauge
Pin 3
Auto On
Disable
See note 1
White/Blue
CAT 5
Pin 4 GND IO COM3, ground Blue, CAT 5
Pin 5 RS232 In
COM3, connect to TxD
on DTE
White/Green
CAT 5
Pin 6 RS232 Out
COM3, connect to RxD
on DTE
Green, CAT 5
Pin 7 CAN L CAN bus
White/Brown
CAT 5
Pin 8 CAN H CAN bus Brown, CAT 5
Pin 9 NetSync B
For NCU synchronization,
to NetSync B on
other NCUs
White/Orange
CAT 5
Pin
10
NetSync A
For NCU synchronization,
to NetSync A on
other NCUs
Orange, CAT 5
Pin
11
Vin RTN
Ground for 9-36 V DC
power
Green,
20 gauge
Pin
12
IGN Main See Note 1 below
White,
20 gauge
Table 3-4: J1 Cable Connector, NCU and Remote
Note 1. Radio status Pin 12 high Pin 12 low
Pin 3 open Power ON Power OFF
Pin 3 grounded Power ON Power ON