Single Reader Expansion Module Last updated Save as PDF Data sheets MR50 Single Reader Expansion Module (ADC-AC-MR50) - Data SheetSingle Reader Expansion Module (ADC-ACX1) - Data Sheet Installation guides Wire a Door Position Switch to an Single Reader Expansion Module (ADC-AC-MR50) User guides How-to troubleshooting guides MR50 Single Reader Expansion Module (ADC-AC-MR50) is showing tamperSingle Reader Expansion Module (ADC-ACX1) is showing tamper Frequently asked questions Can I use a Mercury MR50 Reader Interface board from another provider?What are the differences between the ADC-ACX1 and ADC-AC-MR50 Single Reader Expansion Modules?What are the jumpers on the ADC-AC-MR50 for?What are the jumpers on the ADC-ACX1 for?Which wire gauge should be used with Access Control Expansion Modules?