User's Manual

CONNECTORS

CONNECTORS ON THE RFU

330 E

NVOY™ TRANSCEIVER REFERENCE MANUAL

15-way GPIO connector

The GPIO connector is on a flying lead located on the left side of the back panel. It is

used to interface to a variety of third-party products such as morse keys, GPS units etc.

Figure 73: Front view of the 15-way connector

Table 23: Pinouts of the 15-way connector

Pin no. Function Input/output Signal level

1RTS

(Audio 2 out)

Output RS232

2 RS232 Rx data Input RS232

3 RS232 Tx data Output RS232

4 Ground 0 V

5 Tx audio (10 k

balanced)

Input 300 mV p–p ALC

threshold

6 External alarm relay

contact

(Audio 2 out)

(NO or NC depending

on jumper P402)

Contacts rated 50 V, 1 A

7 External alarm relay

common, or

600  balanced audio

Output Contacts rated 50 V, 1 A,

600  audio

8 A rail protected

(2 A maximum)

Output +13.6 V nominal

9CTS

(Audio 2 In)

Input RS232

10 PTT Input 5 V TTL logic active low

11 Morse Input 5 V TTL logic active low

12 Busy

(Mute out)

Output 5 V logic

915