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OptoNews: Sinking and sourcing explained

Posted by Jean Femia on Oct 7, 2015 2:48:18 PM

Sinking vs. Sourcing demoConfused about sinking and sourcing in DC circuits?

Want to find out which digital output module to use in a DC circuit?

Manufacturers label their DC outputs in different ways. This new animated demo defines sinking and sourcing and shows you which type of Opto 22 output module to use, depending on your application.

NOTE: Here's a follow-up blog post that helps answer the questions in the comments, below. 

And here's a quick technical note that may help, too. 

Once you've figured out whether you need a sinking or sourcing output module, you'll find we have plenty of guaranteed-for-life SNAP I/O DC outputs. Here are some for sinking:

And for sourcing:
Factory Mutual-approved DC outputs for sinking:
  • 4 points, 5-60 VDC sinking, lifetime warranty, Factory Mutual approvedSNAP-ODC5SNKFM
  • 32 points, 5-60 VDC sinking, lifetime warranty, Factory Mutual approvedSNAP-ODC-32-SNK-FM
Factory Mutual-approved DC outputs for sourcing:
  • 4 points, 5-60 VDC sourcing, lifetime warranty, Factory Mutual approvedSNAP-ODC5SRCFM
  • 32 points, 5-60 VDC sourcing, lifetime warranty, Factory Mutual approvedSNAP-ODC-32-SRC-FM
See the Sinking/Sourcing demo

Topics: Discrete control, optonews, Training, I/O, OptoNews 2015-10-07

Written by Jean Femia

Jean Femia writes about technical subjects and has focused on automation and control systems for more than 15 years. She likes learning about technology and taking corners in her Honda S2000.
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