This module has 32 two pole relays arranged as four separate 8×1 multiplexers.
The muxes may be operated and wired individually for up to 64 8×1’s per chassis, or jumpered together to form 16×1’s or 32×1’s or jumpered to the backplane to form up to a 512×1 mux or two 256×1 muxes.
It is available with Type A, Armature relays only. Relays may be driven in pairs to build 4 wire multiplexers up to 256×1 per chassis.