gromit

1771-OW16 vs 1771-OW16/B rev H01

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What is the difference between the 1771-OW16 and  1771-OW16/B rev H01 relay output modules?

Can the 1771-OW16/B replace the 1771-OW16 module, or there other constraints?

Thanks.

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That's a really old card on a really old system. That goes in a PLC-5 chassis, yes? Usually when a catalog number has a "/A" or "/B" etc behind it, that designates additional functionality added to the newer model. For years Allen Bradley has been in the habit of adding new features to the end of the list (so-to-speak) so as to make I/O cards backward compatible. I did open an RS5 file and looked at available I/O cards. It only shows the 1171-OW16, and does not differentiate between /A, /B, etc. So, I don't think you should have any issues using the /B as a direct replacement. 

Unfortunately, Allen Bradley has retired the PLC-5 so I wasn't able to find a readily available .pdf on the I/O cards. If I do come across one, I reply again with a link.

Hope this helps.

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Here's a link to the installation manual for the 1771-OW16/B. On page 5, it states that the /B series must be used with a series B or later chassis.

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