MR52 Two Reader Expansion Module (ADC-AC-MR52) is showing tamper

If the MR52 Two Reader Expansion Module (ADC-AC-MR52) is showing tamper:

Verify that TMP and GND on TB5 are wired to an enclosure's tamper switch, or place a jumper wire between TMP and GND to close the loop if no tamper switch will be used.