It mounts on a DIN rail, but unlike conventional blocks, there is a pin header on one side on 5.08-mm spacing that accepts the plug-in block. The unit's vertical connector entry provides for a complete circuit from 2 to 20 positions to be mated and unmated in one action. Both the plug and terminal block are polarized so mating is only in one direction.

Automation Systems Interconnect Inc., Box 1230, Carlisle, PA 17013, (717) 249-5581,