The Marantec M3-691 is a wireless keyless entry keypad designed for Marantec garage door openers, letting you open and close the door with a secure PIN instead of a handheld remote. Intended for mounting outside the garage, it serves as a convenient replacement keypad or upgrade for residential and light commercial applications. The unit is built for everyday outdoor use, with a protective cover to shield the keypad from the elements, and is battery-powered for straightforward installation without running wires.
This keypad is engineered for Marantec operators that use the M3 radio system commonly found on US models, including many Synergy-series openers. Programming is performed at the opener head using the Learn/Program button, then assigning your personal PIN to the keypad; no special tools are required. For compatibility, verify that your opener references the Marantec M3 315 MHz platform; it is not intended for older or non‑US radio systems unless a matching external receiver is installed. Typical installation involves mounting the keypad near the door jamb at a convenient height, setting a secure PIN, and testing operation to ensure safe door movement and proper reversal. As with any garage door control, keep the keypad out of reach of children, do not mount near moving parts, and test safety sensors and force-reversal after programming.