The 1131 handset typically uses 5 active terminals. If you are replacing an old unit, it is highly recommended to before disconnecting it. Description 1 Speech In Speaker (Receives audio from the entrance panel) 2 Speech Out Microphone (Sends audio to the entrance panel) 6 Common Ground/Common return for the system 9 Lock Door Release (Triggers the electric lock) CA Call Electronic call signal (The buzzer/speaker ring)
: A detailed visual guide for the 1131 terminal layout can be found on Technical Manual (French) : A comprehensive 18-page guide is available via ManualsLib comparison table urmet 1131 manual full
1.0 (Compiled for User Reference) Applicable Models: Urmet 1131 Series (Including variants 1131/0, 1131/1, 1131/2) label each wire The 1131 handset typically uses