Motor Start/Stop Circuit with Jog switch. Designed to turn an output on and off that can in turn be wired to a motor starter to start/stop a motor.
Motor Start Stop with Jog Circuit
Circuit includes a momentary start pulse and an auxiliary contact sealin delay timer. Circuit also provides a motor jog function. Jog switch must be a physical, wired, non-maintained switch for safe operation.
The -|P|- contact is a positive going transitional contact used to provide a momentary start pulse. Required for safe operation of this logic diagram.
Normal operation -
When the start button, switch, input or bit is turned ON (bit=1) and the stop button, switch, input or bit is ON (bit=1) then the Motor starter output will turn ON (bit=1).
The sealin delay timer will maintain power to the Motor starter output until the Aux contact input from the motor starter provides an input (bit=1).
If the Aux contact input fails to turn on (bit=1) the timer will time out and the output will de-energize (bit=0).
If the Aux contact input is turned on (bit=1), indicating that the starter has engaged, then the output to the motor starter will be maintained and the output will stay ON (bit=1).
The output will stay on until the stop button, switch, input or bit is turned OFF (bit=0).
Jog function
Provides the ability to bump the motor for maintenance purposes. (Check rotation direction etc…). The jog function requires a Momentary (non maintained) switch for the jog switch.
As long as the jog input is ON (bit=1) the motor will run. The stop button is also active during Jog operation, for added safety