Each PM123 Auxiliary Input Module provides two inputs capable of monitoring normally open dry contacts. This allows the Tek-CARE120/160 and Tek-CARE400 P5+ Nurse Call Systems to monitor devices such as door contacts, security panel outputs, and more.

PM123 modules may be connected to LI122UN and PM120 Room Controllers or IR42xP5 stations.

There are two behaviors, Follower and Acknowledge, which are programmable using the LS450 Config Tool.