These modules have 16 relays with inputs located on rear panel header connectors and outputs bussed on the motherboard. The G-1S has 1 Pole, Type S relays, two 20 pin headers. Requires a signal I/O mod and limits mainframe to 15 switch modules.
$290.00
3 Pole Signal I/O
2 Pole, Type S relays, choose connectors and configuration
8×1 High Isolation Terminated Switch Module w/BNC
2×1 One Pole Failsafe 50 Ohm