The SOMMER 3100 Pass Thru Door Sensor is a safety interlock designed for sectional garage doors that include a built-in pedestrian “wicket” or pass-through door. When installed and connected to a compatible SOMMER operator’s pass-door input, the sensor monitors the status of the pedestrian door and prevents motorized operation if it is open, helping protect the door system and users from damage or injury. This makes it an ideal replacement part or upgrade for residential or commercial applications where a man door is integrated into the main door panel.
This pass-through door sensor functions as a dry-contact switch that wires directly to the opener’s low-voltage control terminals; no external power is required. Typical use involves mounting the magnetic contact on the pass door and frame, routing the lead to the operator, and enabling or confirming the pass-door safety input in the control settings (if applicable to the model). It is intended for SOMMER garage door openers and operators that support a wicket/pass-door safety circuit. For best results, mount the contact on a stable surface, align the magnet carefully, secure wiring away from moving hardware, disconnect power before installation, and test the interlock after setup to ensure the operator will not run while the pedestrian door is open.