IU 400 is an interface/analyzer for glass break detector GD 475 and shock detector CD 475. It has three relays one for Intrusion, one for
Fault and one for Tamper. Max 10 units of GD 475/CD 475 detectors can be connected to one IU 400 unit.IU 400 together with GD
475/CD 475 is certified according to EN 50131-1 and EN 50131-2-7-2:2013 Grade 3, Class II.