Built-in 2ch IR control and Logic automation function RCU Room Control Unit 2.0, DIN-Rail Mount, HDL BUS PRO, RJ45, INNER RJ45, UDP/IP Network Interface, Totally 23 Channel output: Relay 1-10: 5A, Relay 11-12:16A, Relay 13-20: 3A including one channel for Emergency light, Mosfet Dimming 21-23: 1A, 48 Ch Dry contact input/output. 1ch Door Bell relay, built-in 2ch IR control and Logic automation function.