The GX6125 consists of 25 individual relays. The relays are connected to J6 as shown in the figure below.
GX6125 Architecture
The GX6125 has 75 Form 1C (SPDT) relays (see figure below).
A typical GX6125 relay
The relays can be configured by software commands as closed (CO to NC) or as open (CO to NO)
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 the Normally Open (NO) terminal and connected to the Normally Close (NC). After the board is reset, all relays are deactivated. All of the CO, NO and NC terminals are connected to the connector (see table for J6 connectors pins).