Powering 240VAC device from PLC

Newbie2016 · Nov 28, 2016

If I am starting a 240VAC device from a digital output, will i need a 240VAC DO card and a 240VAC relay?

Or is there another way to achieve it?

T Gibbs · Nov 28, 2016

You can use any output card you want. You just need a relay with the coil voltage to match the output of your PLC. Then the 240 volts goes through the relay contacts.

dwoodlock · Nov 28, 2016

There are PLC's that have relay outputs that can switch that voltage, but it will depend on the power the device needs.

For instance a S7-1200 plc can switch 250v, but only for a max of 200watts.

T Gibbs · Nov 28, 2016

dwoodlock said:
There are PLC's that have relay outputs that can switch that voltage, but it will depend on the power the device needs.

For instance a S7-1200 plc can switch 250v, but only for a max of 200watts.

True. A Click CO-04TRS will switch 250v at a maximum of 7A. I just always feel better putting anything more than a solenoid or relay coil through an interposing relay.

dwoodlock · Nov 28, 2016

T Gibbs said:
True. A Click CO-04TRS will switch 250v at a maximum of 7A. I just always feel better putting anything more than a solenoid or relay coil through an interposing relay.

Yeah I'm definitely with you on that. I generally don't use relay out's unless I absolutely have to.

Powering 240VAC device from PLC

Newbie2016

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dwoodlock

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T Gibbs

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dwoodlock

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