21 June 2021
Information about the H HO A and AO on the red button of the LR9DProduct Line:
NEMA and Definite Purpose Contractors and StartersEnvironment:
North American ProductsResolution:
The H indicates that the device is set to hand reset mode, and the A indicates that the device is set to auto reset mode. When you add the "O" the red button can now act as a stop button as well. In HO the device is in hand reset and the red button acts as a stop button, and in AO the device is in auto reset and the red button acts as a stop button.