Connect incremental rotary encoder to S7-1200?

Pete.S.

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Mar 2016
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Hi guys!

I know the Siemens S7-1200 has pulse inputs but I was wondering if you can connect a standard incremental encoder in quadrature mode (two pulse trains A/B) to the S7-1200 directly?

If you can - what voltages does it support?

Thanks,
Pete
 
Looks like 24 vdc standard and 5vdc if you add the small signal board in the center
Also A/B
I haven't tried the 5vdc on the signal board yet

enc.jpg enc1.jpg
 
I did it via the SB once, for the 5V. I think the SB actually had a faster HS counter than the main inputs.
 

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