REAR PANEL CONNECTORS
GPO CONNECTOR 1-8:
Isolated Relay
Contact Closures
To WET GPOs:
Connect external power supply
output to Common Bus, pin #1.
Connect GPO commons to
nearby Common Bus pins
There is no need to connect
power supply Ground to GPO
connector
Pin # Description Pin # Description
1 Common Bus 14 GP0 8 N.O
2 GPO 8 Common 15 Common Bus
3 Common Bus 16 GPO 7 N.O.
4 GPO 7 Common 17 GPO 6 N.O.
5 GPO 6 Common 18 Common Bus
6 Common Bus 19 GPO 5 N.O.
7 GPO 5 Common 20 GPO 4 N.O.
8 GPO 4 Common 21 Common Bus
9 Common Bus 22 GPIO 3 N.O.
10 GPO 3 Common 23 GPO 2 N.O.
11 GPO 2 Common 24 Common Bus
12 Common Bus 25 GPO 1 N.O.
13 GPO 1 Common
GPO CONNECTOR 9-16:
Isolated Relay
Contact Closures
To WET GPOs:
Connect external power supply
output to Common Bus, pin #1.
Connect GPO commons to
nearby Common Bus pins
There is no need to connect
power supply Ground to GPO
connector
Pin # Description Pin # Description
1 Common Bus 14 GP0 16 N.O
2 GPO 16 Common 15 Common Bus
3 Common Bus 16 GPO 15 N.O.
4 GPO 15 Common 17 GPO 14 N.O.
5 GPO 14 Common 18 Common Bus
6 Common Bus 19 GPO 13 N.O.
7 GPO 13 Common 20 GPO 12 N.O.
8 GPO 12 Common 21 Common Bus
9 Common Bus 22 GPIO 11 N.O.
10 GPO 11 Common 23 GPO 10 N.O.
11 GPO 10 Common 24 Common Bus
12 Common Bus 25 GPO 9 N.O.
13 GPO 9 Common
USP3-KEYSERVER User Manual 8 OF 12
