These modules have 16 relays with inputs located on rear panel header connectors and outputs bussed on the motherboard. The G-2S has 2 Pole, Type S relays, two 20 pin headers (requires signal I/O mod and limits mainframe to 15 switch modules).
$580.00
Discrete 4×4 Coaxial Matrix with SMA
1 Pole, Type S relays, two 20 pin headers, requires signal I/O mod and limits mainframe to 15 switch modules
2 Pole, High Voltage (BE) relays, choose connectors and configuration
4×1 High Isolation Terminated w/BNC