These Chassis control up to 16 modules with as many as 32 two pole relays per module allowing 1xN multiplexers up to 1020×1, 2 pole muxes up to 512×1 or 2xN matrix configurations up to 256×2. Jumpering option allow the modules to be controlled as separate smaller muxes, i.e. 64 4×1 2 pole muxes, or combine specific groups to allow an almost unlimited combination of sizes.

Dimensions: 19″ Rack Mount (483 mm) 15″ deep (381 mm) 7″ to 10.5″ (4 to 6 RU) high (180 to 270 mm)
Weight: 15 to 25 lbs (7 to 12 Kg) max AC Power : 75 Watts max. 110/220 selectable.

DC to 150 MHz depending on configuration.
1×4 through 1×1020 single pole mux per chassis.
2×4 through 2×256 1 or 2 pole mux per chassis.
LAN, GPIB, USB, RS232 or Manual Control
Type S reed relays, Armature relays, Low Thermal Relays or High voltage relays for almost any signal range.
Custom systems and configurations

link to JX switch modules