These modules have 16 relays with inputs located on rear panel header connectors and outputs bussed on the motherboard. VX16/G3 has 16 three pole relays wired out to a 50 pin header requires signal I/O mod and limits mainframe to 15 switch modules.
$535.00
1 Pole, Type S relays, two 20 pin headers, requires signal I/O mod and limits mainframe to 15 switch modules
2 Pole, Type S relays, choose connectors and configuration
8×1 One Pole Terminated Type S Reed w/BNC
8×1 High Isolation Terminated Switch Module w/BNC