Monitored safety inputs: 3 Main Board 3 Expansion Board.
Temperature specs: Without Heater: -4°F (-20°C) to 140°F (60°C). With optional heater (HTRNB: HTR460 for 460V operators): -40°F (-40°C) to 140°F (60°C)
K20-8100M-DC is a 1HP Motor Replacement Kit (90VDC BM CF). For use with various LiftMaster® 1HP 1-Phase Commercial Door Operators and Gate Operator Systems