What is purpose to use relay after digital output module? Why normally we don&#

What is purpose to use relay after digital output module?
Why normally we don't use relay for digital input module?

Question Posted / plc_alto

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What is purpose to use relay after digital output module? Why normally we don't use relay for ..

Because digital output module out put lode capacity is low
and use relay then we can incrise the output lode & lode
short ckt proctaction also....
in input module pts not need more current and voltage just
a on-off pules

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What is purpose to use relay after digital output module? Why normally we don't use relay for ..

Answer / madam.bhupal

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What is purpose to use relay after digital output module? Why normally we don't use relay for ..

Answer / senthil

Digital O/P module used as interface relay(isolation
circuit) between controller to the load. we cannot connect
the controller output to the load side, which may required
high amps to energise a contactor coil or etc.,In this way
controller is not get loaded.

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