Proper wiring is critical when replacing an older unit. The Urmet 1131 uses specific terminal markings to ensure voice and lock functions work correctly: Description Input for the electronic ring signal. 1 Receives audio from the outdoor panel. 2 Microphone Sends audio to the outdoor panel. 6 Ground (0V) Common ground for all functions. 9 Lock Release Operates the electric door strike. 10 Lock Common Common terminal for the lock switch (often linked to 6). Installation Instructions
Do not rely on guesswork or fragmented online forum posts. Secure your today, and you will have a reliable, clear, and secure entry system for years to come. urmet 1131 manual full
Before installing or replacing the handset, it is essential to understand the terminal mapping. The Urmet 1131 usually has terminals labeled 1-10, though only a few are used in standard installations. 1: Microphone (Speech In) 2: Ground (Common Return) 3: Earphone (Speech Out) 4: Door Lock (Lock Release) CA (or 6): Call Wire (Electronic Call) Proper wiring is critical when replacing an older unit