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Can the 1756-IA16/A Module Support TTL Inputs and Both Sourcing and Sinking Configurations?

Question:

Hello, I have a couple of inquiries:1- Is it possible to utilize the 1756-IA16/A module with TTL inputs? Can it work with both sourcing (PNP) and sinking (NPN) configurations?2- What significance does the "/A" in the part number of the module hold?

Top Replies

The 1756-IA16 is a Module with 120V AC Input that is part of Series A. If you are looking for a compatible module, refer to the specifications of the module. In the event of new hardware being introduced, subsequent versions will be denoted by Series B, C, and so on, typically due to component obsolescence.

Thank you for your input plvlce and apologies for the error in my previous message. I actually meant to refer to the 1756-IB16 DC input card, not the AC input card I mentioned before. Now that we have cleared up the version question, I have a new query: Can the 1756-IB16 DC input card be used with TTL inputs? Is it compatible with both sourcing (PNP) and sinking (NPN) configurations?

For more information, you can visit the Rockwell Automation literature page and access the document at the following link: https://literature.rockwellautomation.com/idc/groups/literature/documents/td/1756-td002_-en-e.pdf. Navigate to page 41 for specific information.

For information on voltage values and compatibility with TTL inputs, refer to page 41 of the manual linked in post #2. To ensure proper switching, a 1756-IG16 is required, where low equals true and high equals false.

In order to ensure compatibility with TTL inputs, it is recommended to use a 1756-IG16 module, despite its low = true and high = false configuration. However, an alternative option is to simply utilize an Exclusive Or operation to toggle the bits if dealing with inverted inputs is not desired.

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We are grateful for all of your responses and assistance. Thank you.

Frequently Asked Questions (FAQ)

FAQ: 1. Can the 1756-IA16/A module support TTL inputs?

Answer: - The 1756-IA16/A module does not support TTL inputs. It is designed for industrial applications and works with standard voltage inputs.

FAQ: 2. Can the 1756-IA16/A module work with both sourcing (PNP) and sinking (NPN) configurations?

Answer: - Yes, the 1756-IA16/A module can work with both sourcing (PNP) and sinking (NPN) configurations, providing flexibility in your application setup.

FAQ: 3. What does the "/A" in the part number of the module signify?

Answer: - The "/A" in the part number of the module typically indicates a revision or variation of the original model. It may include updates or improvements over the base model.

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