The TR22A11KNX external card reader is an EIB/KNX device dedicated to access control. This product is for both 2 modules round and squared inwall boxes or for 3 modules boxes, the plexiglass front of the product is available in two different colours. The device has two physical binary inputs available for controlling the door open / close contacts or freely configurable by the user (window contacts, bathroom pull alarms etc.). The device has two relays for lock management, courtesy light control or another use. On the reader front there are 4 LEDs, 3 of which are freely configurable, usually programmed to report about: access granted, access denied, emergency, make up room, room occupied or do not disturb.