The GX6338 consists of three switching groups: A, B and C. Each group has 38 individual relays. The group relays A, B and C are connected to J6, J7 and J8 connectors as shown in the figure below:
GX6338 Architecture
The GX6338 has 114 Form A (SPST) relays (see the figure below).
A typical GX6338 relay
When the relay is activated, the Change Over (CO) terminal is connected to the Normally Open (NO) terminal. When the relay is deactivated, the CO terminal is disconnected from to the Normally Closed (NO) terminal. After the board is reset, all relays are deactivated. Both sides of the relay are connected to the connector, one side is CHnA and the other is CHnB, where n is 1 to 144 (see J6 Group A Relays Connector, J7 Group B Relays Connector, and J8 Group C Relays Connector for J6, J7 and J8 connectors' pins).