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.
$485.00
1 Pole, Type S, Form C discrete relays
1 Pole, Type S relays, choose connectors and configuration
4×1 One Pole Type S Reed w/BNC
2×1 One Pole Failsafe 50 Ohm