{}

Our Brands

Impact-Company-Logo-English Black-01-177x54

Welcome to the Schneider Electric Website

Welcome to our website.
How can we help you today?
Can SCom and DICom be connected together on a single 7650?

It is not recommended to connect the two common points because they are separate supplies and the ratings of the two inputs are different.
Connecting the two Commons essentially connects two power supplies together. This is not necessarily a problem until other connections (S1 & D1, etc) are made, in which case there could be over voltage situations depending on what is connected to S1 and D1.

e.g. You decide to externally excite the Digital inputs:

  • The onboard Digital Inputs (S inputs) can handle up to 150V but the expansion card Digital Inputs (DI inputs) can only handle 50V. If the Commons are tied together and a 100V supply is connected, the Expansion card Digital Inputs could get damaged.




Original article#16491
Last Revised: November 1, 2007
Public
All content © 1992-2007 Schneider Electric

Legacy KB System (APS) Data: RESL189280 V1.0, Originally authored by KBAdPM on 11/17/2007, Last Edited by KBAdPM on 11/17/2007
Related ranges: ION7550/ION7650

Schneider Electric UK

Explore more
Range:
Articles that might be helpful Users group

Discuss this topic with experts

Visit our Community for first-hand insights from experts and peers on this topic and more.
Explore more
Range: