› M1 Support Forum › 1141 = Expansion Module Trouble Message › Reply To: 1141 = Expansion Module Trouble Message
Brad, Thanks for the reply.
It does it a random times. I can provide a spreadsheet that contains a segment of the log for this unit. The expansion module is daisy chained to the data bus along with one of the keypads.
I went over to the client’s house to check the voltage for the ELK-M1XRF2H expansion module. It was installed a long time ago, and there has been some remodeling done in the house. Consequently, I was unable to find the module. Are you able to offer any suggestions?
In your reply from October 27, you suggested “With the M1 powered off including any secondary power supplies powering Bus Devices measure the resistance across Data A and Data B at the M1 Main Board — you should measure ~60 – 70Ω Ohms.” In a situation like this, is there a secondary power supply providing power to the expansion module?