Internet PLC Forum
General => Technical support => Topic started by: ccdubs on May 28, 2010, 02:52:22 PM
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What are the 24Vdc current ratings of each relay output on the F1616 PLC.
The manual says 5A @24V/120VAC. I assume 24V is DC.
If the rating is 5A each how does the board conduct a maximum of 60A (5 A *12 relays) safely? There doesn't appear to be any significant conductors and the COM pin is quite small.
Can you also confirm that there are no issues connecting +24Vdc to the COM terminal of the relay DO's.
Many thanks.
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Each relay is able to conduct 5A @24VDC or 5A @120VAC.
However, the common screw terminal is only rated for 10A continuous so it is not possible to parallel a few relays to conduct 60A of current. For such high current you should use the PLC's output (solid state or relay) to drive a "contactor" which are specialty relays that are designed to handle high current.
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Understood. This should be in the user manual as it could quite easily be overlooked.