Industrial 4300B-2 700-0280, 70011-1000 Light Curtain Control

STI MiniSafe-B/FlexSafe 4300B-2 700-0280, 70011-1000 Light Curtain Controller is the central control unit for STI’s 4300-series safety light curtains, coordinating MiniSafe-B and FlexSafe configurations to monitor beam status and drive the safeguarding logic in industrial equipment. Identified by MS43-B2-AC1 in common catalogs and linked to model numbers 700-0280 and 70011-1000, this controller provides the required interface between the safety light curtain transceivers and the machine’s safety circuits. The unit operates from 115 VAC with a typical power draw of 23 VA, and its enclosure and internal safety circuitry correspond to a weight around 12 pounds. Common application scenarios include machine guarding for presses, conveyors, and other automated equipment that relies on a two-beam safety curtain to halt operation when the sensing field is interrupted. The MS43-B2-AC1 designation appears across reseller catalogs and repair references, confirming the 4300B-2 family as part of STI’s MiniSafe/FlexSafe line of light curtain controllers. In practice, the 4300B-2 serves as the controller that interprets beam status from STI 4300-series safety light curtains and delivers appropriate control signals to the guarding circuit, helping protect operators during setup, maintenance, and automated operation.