What are the differences between the ADC-ACX1 and ADC-AC-MR50 Single Reader Expansion Modules?

Besides the red color and new model number, here are the key updates to the MR50 Single Reader Expansion Module: 

• Use DIP switches for addressing instead of jumpers
• Set the tamper input using J2/J501, above the DIP switches
• If the MR50 is the last device on the communication bus, jumper J1 must be installed
• Relay 2 supports 2 A @30 VDC
• The humidity range is 5 to 95% RHNC