# How to inter face the Digi modules with A/B 1756L61 PLC's

**URL:** <https://forums.digi.com/t/how-to-inter-face-the-digi-modules-with-a-b-1756l61-plcs/563>\
**Category:** XBee - Zigbee\
**Created:** [May 1, 2010, 6:06pm UTC](https://forums.digi.com/t/how-to-inter-face-the-digi-modules-with-a-b-1756l61-plcs/563 "2010-05-01T18:06:50Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![Manny\_2410](https://avatars.discourse-cdn.com/v4/letter/m/f475e1/32.png) [@Manny\_2410](https://forums.digi.com/u/Manny_2410)\
**Post date:** [May 1, 2010, 6:06pm UTC](https://forums.digi.com/t/how-to-inter-face-the-digi-modules-with-a-b-1756l61-plcs/563/1 "2010-05-01T18:06:50Z")

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Were new users of the system, we are trying to communicate between two A/B 1756l61 PLC using the Digi modules with interface systems of our own design. As of today no luck, anybody out there with any help?