The Urmet 1131 is an Atlantico series analog intercom, designed for 4+N wire residential systems with standard terminal mapping for audio, door release, and electronic calls. While widely used for replacement, digital 2-wire variants like the 1131/520 exist and support volume adjustment via internal jumpers. For detailed installation, review the data sheet on Intercoms R Us . House Phone Ref. 1131/520 - Miwi Matibus SE - ManualsLib
: Speech In (Speaker) – where you hear the visitor. urmet 1131 manual full
The Urmet 1131 series includes several models, each with slight variations. Below is a table summarizing the key specifications for the most common variants. The Urmet 1131 is an Atlantico series analog
To successfully wire or replace the Urmet 1131, you must understand its internal terminal block. Opening the casing reveals five primary screw terminals numbered according to Urmet’s standard legacy system. Terminal Number Function Description Technical Detail Speaker (Earpiece) Receives audio from the outdoor entry panel Terminal 2 Microphone Sends audio from the handset to the outdoor panel Terminal 6 Common Ground The shared negative/return path for the system Terminal 7 Call Signal (Buzzer) Receives the 12V AC voltage to ring the buzzer Terminal 9 Door Release Completes the circuit to trigger the electric lock Step-by-Step Installation Instructions Tools Required Small flathead screwdriver (for terminal screws) Phillips head screwdriver (for wall mounting) Wire strippers Digital multimeter (optional, for troubleshooting voltages) Phase 1: Opening the Handset Look at the bottom edge of the Urmet 1131 handset. House Phone Ref
Before removing an old handset, label every wire. A common tip is to cut the wire leaving a small bit of insulation on the old terminal to preserve the color-to-terminal map.