LiftMaster S50LM Monitored Resistive Standard Edges

Ensure your automatic gate meets UL 325 2016 safety standards with Small Profile Monitored Resistive Safety Edges. These entrapment protection devices help prevent damage to gate structures and reduce the risk of injury to pedestrians or vehicles. Gate operators manufactured after January 2016 require a monitored safety device at both the open and closed positions — these sensing edges are designed to meet that requirement for both sliding and swing gate operators.

Available in 4-foot, 5-foot, and 6-foot lengths, each safety edge arrives fully assembled with two end caps (one wired, one non-wired) and an aluminum mounting retainer. The retainer allows installation on either the vertical face (closing edge) or horizontal face (bottom edge) of the gate.

Easy Installation Options:

• Hardwired: Directly connect using the included 39" cable

• Wireless: Integrate with a monitored wireless edge kit for a cleaner look without exposed wires

When the safety edge detects an obstruction, it signals the gate operator to immediately reverse direction, preventing costly damage or injury. Built to withstand harsh outdoor conditions, these edges feature IP65 weather resistance and operate reliably in temperatures from -40ºF to 149ºF (-40ºC to 65ºC).

Key Features:

• Compliant with UL 325 2016 gate operator standards

• For sliding or swing gates

• Available lengths: 4 ft (S504AL), 5 ft (S505AL), 6 ft (S506AL)

• Low-profile design: 1" wide x 1.2" tall

• Hardwire or wireless installation options

• Assembled with aluminum channel and two end caps

• Compatible with monitored gate operator systems manufactured after 1/16 or with a red (burgundy) control board

Technical Specifications:

• Outdoor Rating: IP65

• Temperature Range: -40ºF to 149ºF (-40ºC to 65ºC)

• Cable Length: 39 inches

• Material: TPE rubber

• Electrical Capacity: 24V, 100mA

• Wiring: 2-wire N.O. configuration

A cost-effective, low-maintenance way to improve gate safety and maintain compliance, these small profile monitored resistive safety edges deliver dependable performance in any environment.