1 or 2 Pole Signal I/O Module
$65.00
3 Pole Signal I/O
3 Pole, Type S relays, 50 pin header (requires signal I/O mod and limits mainframe to 15 switch modules)
256 channel Mainframe, holds up to 16 switch modules in a matrix configuration or 15 with the general series. Switch Modules are priced separately.
Signal I/O Module for common slot
