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Installing and aligning photo eyes and entrapment protection devices per UL 325. Covers layout planning and bracket mounting, sensor installation, low-voltage wiring and operator connection, beam alignment, reversal and obstruction testing, monitored sensing edges and constant-pressure mode for commercial applications, and final documentation and labeling of the safety devices.
Warnings
This procedure should only be performed by qualified technicians familiar with the operator and applicable UL 325 safety requirements.
Per UL 325, all operator-equipped doors must have functioning entrapment protection devices. A door without working safety devices must not be left in service.
Photo eyes must be mounted no higher than 6 inches above the floor to detect small objects and children.
Do not route low-voltage sensor wiring in the same conduit as line-voltage (120V/240V) wiring. Electromagnetic interference can cause false signals and safety device malfunction.
Required PPE
Tools required
Step 1
Photo eyes must be mounted no higher than 6 inches above the floor to detect small objects and children. Mounting the beam too high defeats the entrapment protection required by UL 325.
Plan the sensor layout before drilling. Determine the mounting locations for the sending and receiving photo eye units, one on each side of the door opening. The sensors must be mounted no more than 6 inches above the floor, with the infrared beam crossing the full width of the opening. Plan the wire routing path from each sensor to the operator unit, keeping low-voltage wiring separated from line-voltage wiring by at least 12 inches. Once the layout is set, mount the sensor brackets: install the mounting brackets on the door frame, wall, or track angle at the planned locations using the hardware provided with the sensor kit. For masonry or steel jambs, pre-drill with the appropriate bit. Ensure both brackets are at the same height so the beam will be level, and use a tape measure to verify equal height from the floor on both sides.
Pro Tips
Checklist
Disclaimer: These videos are produced by third-party YouTube channels and are not affiliated with DoorBot. Video content may not align exactly with the procedures above, may depict techniques that differ from DASMA or manufacturer recommendations, and may show tasks that are dangerous if performed without proper training and equipment. Always follow the written procedure, your company's safety policies, and applicable industry standards. Use these videos as supplementary reference only.