These Chassis control up to 16 8×1 modules, 32 4×1 modules or any combination or configuration such as a 16×8 matrix, 32×4 matrix or two 16×4 matrices. Matrix configurations are non-blocking and physical layer switches act like a cable connection with D connectors creating a one to one connection between D15  connectors. All wires are switched as a group on each connector for easy programming.  Add Switch Modules to complete the system.

Dimensions: 19″ Rack Mount (483 mm) 15″ deep (381 mm) 7″ ( 4 RU ) high (180 mm)
Weight: 15 to 35 lbs (7 to 16 Kg) max AC Power : 150 Watts max. 110/220 selectable.

DC to 50 MHz
1×8 or dual 1×4 Switch Modules switching 15 wires in groups.
LAN, GPIB, USB, RS232 or Manual Control
Mechanical relays for physical layer switching ( acts like a cable ).
Custom systems and configurations

Link to switch module selector