The LCN 8310-3881 is the OEM single door activation and safety sensor package for the LCN Senior Swing door operator, covering single-door installations on the 9530IQ (pull side) and 9540IQ (push side) operators. The package contains two 8310-875 header mount activation sensors and one 8310-878 monitored safety sensor kit, which includes two door-mounted safety sensors and one control hub. This is the complete sensor specification for a single-leaf automatic door entry -both pedestrian detection directions covered, full ANSI A156.10 compliant safety monitoring in a single order.

Why the 8310-3881 Uses Two Activation Sensors for One Door

A single automatic door leaf has two pedestrian approach directions: approaching from outside (entry) and approaching from inside (exit or re-entry). A pedestrian walking toward either face of the door should trigger the door to open. The two 8310-875 header mount activation sensors in this package serve one sensor per direction -one positioned to detect approach from the outside face, one to detect approach from the inside face.

The 8310-875 is a 24.125 GHz microwave motion sensor that detects the motion signature of a pedestrian approaching the door. It is header-mounted, meaning it mounts in the LCN operator header above the door opening, with its detection field angled downward and outward to cover the approach zone. When a pedestrian enters the detection zone on either face, the corresponding sensor sends an activation signal to the 9530IQ or 9540IQ control box, triggering the powered opening cycle. No physical contact with the door or wall plate is needed. The sensor runs on 12/24 VAC/DC, ships with a 6-inch cable, and meets both ADA and Buy American Act (BAA) requirements.

LCN 8310-878 Monitored Safety Sensor Kit: Single Door Configuration

The 8310-878 is the single-door version of the LCN monitored safety sensor kit. It contains two door-mounted safety sensors and one control hub, providing leading edge and approach zone obstruction detection for one door leaf.

The two safety sensors cover the door's swing path -the arc the door leaf sweeps through during the opening and closing cycle. If a pedestrian, wheelchair, cart, or other object enters the swing path while the operator is driving the door, the safety sensors trigger a stop or reversal before contact occurs. The control hub continuously monitors the operational status of both sensors in real time. If either sensor fails, loses power, or fails its self-test, the control hub detects the fault immediately. This is the "monitored" function: a failed safety sensor is detected and reported, rather than silently allowing the door to operate without pedestrian protection.

This ANSI A156.10 monitored safety architecture is what separates the 8310-878 from unmonitored safety sensor options. ANSI A156.10, the performance standard for power-operated pedestrian doors, requires that safety sensor systems be capable of detecting sensor failure -not just detecting obstructions.

LCN Actuator Catalog: 8310 Package Family for Single vs Double Door

The LCN 8310 sensor package family covers the full Senior Swing operator range in four configurations:

8310-3881 (this product) = single door, covers 9530IQ and 9540IQ operators. Includes 2x 8310-875 activation sensors and 1x 8310-878 safety kit (2 door sensors + hub).

8310-3882 = double door, covers 9550IQ and 9560IQ operators. Includes 2x 8310-875 activation sensors and 1x 8310-879 safety kit (4 door sensors + hub).

8310-3891 = simultaneous pair healthcare package with header safety sensor, spacer, 4 door sensors, and 2 harnesses.

8310-3892 = independent pair healthcare package with 2 header sensors, 2 spacers, 4 door safety sensors, and 2 harnesses.

The correct package for any Senior Swing installation is determined by single vs double door configuration first, then by healthcare vs standard commercial application. The 8310-3881 is the standard commercial single-door specification.