ADC MGA3000 series - Serial (RS 232) Port

Relay Connectors
1 1 & 8
2 2 & 9
3 3 & 10
4 4 & 11
5 5 & 12
13 Not used
7 + 15V
14 0V
7.4 Serial (RS 232) Port
The port signal levels correspond nominally to RS232C specifications; however the output is
approximately ± 9V into 7kΩ.