Omron D4B-2A16N Safety Interlock Limit Switch

Omron D4B-2A16N Safety Interlock Limit Switch is a guard-status sensing device that detects the closure of a safety door or guard on automated equipment and provides a safety interlock signal to the control system. As part of Omron’s D4B interlock family, this switch combines an interlock mechanism with a limit-switch actuator to deliver a definite guard-position input to safety relays or safety PLCs, enabling the safe start-up and operation of equipment only when guards are closed. Designed for industrial environments where guarding is required, the D4B-2A16N supports typical installations on machines such as conveyors, presses, and robotic work cells where access must be prevented during hazardous motion. The device’s role is to ensure that an open guard interrupts machine operation, reducing risk and contributing to compliant safeguarding practices in automated lines.