Here’s what more than 2,500 business decision-makers around the world say.Download the report
...with the Facility Hero app in hand! Discover how you can optimize your maintenance efforts today.Learn more
Access tailored services, 24/7 self-service and expert help. Anywhere, anytime, any project.Discover now
Everything you need to know about our IoT technology backbone.Learn more
Explore our global offerings or select your country from one of our five regions.Global
Découvrez nos offres globales ou sélectionnez votre pays dans l’une de nos cinq régions.
Goals and Symptoms
The purpose of this resolution is to diagram the RS485 wiring for Modbus communications between a Momentum processor and a Merlin Gerin DC150. The RS485 pinout shown in the DC150 User Manual is incorrect.
Facts and Changes
All Momentum Processors can be used in this application. The following have a builtin Modbus RS485 communications port and do not require a 172JNN21032:
Causes and Fixes
RS485 wiring from a Momentum processor (port 2, db9) to a Merlin Gerin DC150.
NOTE: The signal pinouts for the db9 RS485 connector as shown in the Merlin Gerin DC150 User Manual are incorrect. The correct pinouts are shown above.
Sign up for all the latest solutions, offers and best practices straight to your inbox.
We are excited that you have joined the group. You will receive your welcome email soon describing the program and what to expect in the upcoming weeks. Enjoy!