NavCom SR-7120 Rev.A - Manual (Page 61)

Safari Network User Guide
3-15
Subnetwork Control Unit (SCU)
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_SCU_upstream &
COM3_SCU_downstream,
ground
Blue, CAT 5
Pin 5 RS232 In
COM3_SCU_downstream,
connect to TxD on DTE
White/Green,
CAT 5
Pin 6 RS232 Out
COM3_SCU_downstream,
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 RS232 In
COM3_SCU_upstream,
connect to TxD on DTE White/Orange,
CAT 5
Pin
10
RS232 Out
COM3_SCU_upstream,
connect to RxD on DTE
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 3-6: J1 Connector for SCU
Note 1. Radio status Pin 12 high Pin 12 low
Pin 3 open Power ON Power OFF
Pin 3 grounded Power ON Power ON