Question

Is there a difference between the way drives are defined as sinking or sourcing devices versus PLCs?

Answer

Yes, the big difference is drives are classified as the devices that they connect too, where as PLCs are classified as the device itself. It’s a little confusing, but allow us to elaborate on discrete inputs:
 SJ300 is defaulted as sinking, so it connects to sinking devices. If you wanted to control multi-speeds with a dc output card instead of a relay card, it must be sinking in nature. The SJ300 is the only drive that can be changed to sourcing. Change the jumper between P24 and PLC (default) to PLC and CM1. You can now connect it to a sourcing card.
 L100 and SJ100 are classified as sourcing devices, so they only connect to sourcing cards.

Special Note: All analog inputs (0-10vdc and 4-20ma) must be sourcing in nature.

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FAQ Subcategory: None

This item was last updated on 2001-11-14
Document ID: 769

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