Chain spreader for installation with 1" operator shaft and 1-1/4" door shaft
Designed to keep tension on the chain when used with a wall mount commercial operator. It helps avoid premature wear on the door shaft bearing and commercial operator output shaft bearing
Was previously MWRTA02A now has a new board making installation easier
Includes single channel receiver (MWR12A) and transmitter (MWTA12) with audible low battery alarm.
This feature that activates when the battery has only 25% of its life remaining indicating the battery should be replaced. The alarm sounds for 5 to 10 seconds at 1 to 2 minute intervals.
The receiver operates on either 12 or 24 volt AC/DC and provides N.O. or N.C. output.
Air pressure is lead via a hose or pipe to a diaphragm contact. This contact converts the positive or negative pressure into an electrical contact and pulse.
Applications: commercial sectional doors rolling doors and mass transit
Works on doors up to 60ft
Can be used with standard pneumatic hose and Miller Edge extrusion
This modification provides a TEFC motor N4/12 watertight/oiltight control enclosure waterproof drive and limit chain NEMA4 thru-beam eyes and a watertight/oiltight three-button station.