Multi-Beam 3- & 4-wire power block modules provide regulated low voltage DC power to the scanner block and logic module in Multi-Beam modular photoelectric sensors and contain a solid state infinite-life switch for switching external circuitry. Open-collector output transistors switch up to 250mA maximum. On-state voltage drop is less than 1Vdc. Off-state leakage current is less than 10 micro amps. Connections are made to heavy-duty screw terminals which accept up to #14 gauge wire (no lugs are necessary). All power blocks are epoxy-encapsulated and rated for -40 to +70 degrees C (-40 to +158 degrees F). All DC power blocks are color coded grey for easy identification.