Service manual

Installation: Electrical Connections 2-25

Table 2-8. J5 System Connector, Row C Pins

Pin # Pin Assignment

Input/

Output

To/From Signal Characteristics

1 Reserved O J1-A32, J2-A32 –

2 Reserved O J1-A31, J2-A31, J3-A26 –

3 Carrier Operated Relay (Normally

Open)

O J1-A30, J2-A30 Normally Open Relay Contact

4 Reserved O J1-A29, J2-A29 –

5 Reserved I J1-A28, J2-A28 –

6 Reserved I J1-A27, J2-A27, J3-B26 –

7 Reserved I J1-A26, J2-A26 –

8 Reserved I J3-A25 –

9 RF Relay Control Out (Auxiliary I/O) O J1-B5, J2-B5 OCO, 200 mA, 40 V, active

high

10 Ext PTT* Out (Auxiliary I/O) I J1-A23, J2-A23, J3-A23 TTL input

11 RSSI O J1-A22, J2-A22, J3-A22 Typically 0.5 VDC for -120

dBm to 4.5 VDC for -40 dBm

carrier. Variation with carrier

level at approximately 50 mV/

dBm.

12 Reserved I/O J1-A24, J2-A24 –

13 N/C – – –

14 Aux Rx Audio O J1-A19, J2-A19, J3-A19, J7-3 –

15 GND – Station ground –

16 GND – Station ground –

17 Reserved O J1-A16, J2-A16, J3-A16 –

18 Accessory 14.2 VDC O P8 pins 3, 4 (through F2) +14.2 VDC

19 GND – Station ground –

20 5 VDC O P8 pins 7, 8 +5.1 ± 0.25 VDC

21 Reserved O J3-A12 –

22 N/C – – –

23 N/C – – –

24 GPIO_10 I/O J1-A9, J2-A9, J3-A17 TTL input/output

25 N/C – – –

26 N/C – – –

27 GND – Station ground –

28 Reserved I J4-C12 –

29 GPIO_9 I/O J1-A4, J2-A4, J3-A13 TTL input/output

30 Reserved I J4-A11 –

31 GND – Station ground –

32 Accessory 14.2 VDC O P8 pins 3, 4 (through F2) +14.2 VDC