What are the jumpers on the ADC-AC-MR50 for?
J1
The J1 jumper is the end-of-line termination jumper. It should only be installed if the expansion is the last in the chain of expansions connected to a controller.
J2
The J2 jumper is used for the expansion tamper. If the jumper is not attached with the black and white wire harness, the expansion module will show a tamper.
Note: The J2 jumper may be labeled as J501 on newer ADC-AC-MR50 boards.
