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Short out Terminal 6 and Terminal 9 with a small piece of insulated wire. If the door opens, the handset button is faulty. If it does not open, the issue lies in the building's central power supply or external lock wiring. Issue 3: Low Volume or High-Pitched Screeching (Feedback)
The Urmet 1131 series is available in several variations to suit different systems. The table above summarizes the key differences between the most common analog and digital models. The device features a surface-mounted design for wall installation. The base model includes a door opening button, while more advanced versions, like the 1131/1, also include an additional button for programmable functions like intercom or automation. urmet 1131 manual full
| Feature | Urmet 1131 (Standard) | Urmet 1131/1 | Urmet 1131/620 (Digital) | | :--- | :--- | :--- | :--- | | | Giugiaro Design | Giugiaro Design | N/A | | System Type | Analog (4+n) | Analog (4+n) | Digital (MATIBUS) | | Mounting | Surface-mounted (Wall) | Surface-mounted (Wall) | Surface-mounted | | Dimensions | 218 x 77 x 56 mm | 218 x 77 x 56 mm | 218 x 77 x 56 mm | | Material | ABS Plastic | ABS Plastic | ABS Plastic | | Available Colors | White / Graphite | White | White | | Number of Buttons | 1 (door release) | 2 (door release + 1 function key)| 1 (door release) | | Microphone Type | Electret / Condenser | Condenser microphone【9†L5?】 | N/A | | Call Tone | Electronic (through handset speaker) | Electronic | N/A | Short out Terminal 6 and Terminal 9 with
To wire or replace an Urmet 1131 handset, you must understand the numbering system on the internal terminal block. Open the casing by pressing the release tab at the bottom to reveal the following terminals: Terminal Number Function / Description Speaker (Voice coming from the outdoor entry panel) Terminal 2 Microphone (Voice going to the outdoor entry panel) Terminal 6 Common Ground (Earth / Negative) Terminal 7 Call Signal (Buzzer or Electronic chime input) Terminal 9 Door Lock Release (Triggers the electric latch) Auxiliary Terminals (If Expanded) Issue 3: Low Volume or High-Pitched Screeching (Feedback)
rather than stranded cable for more reliable terminal connections. Intercoms R Us Documentation & Resources