Motor Start Stop with Jog Circuit


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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