The WRT‑RI smart network intercom system consists of a building main unit, user extensions, a management‑center computer and auxiliary equipment. The YTZS-2120D8S7 visual extension unit can be used in single‑family homes, villas or community buildings, offering hands‑free intercom, remote unlocking, eight alarm zones and video monitoring.
This guide covers installation precautions, wall‑mount installation steps, wiring diagrams, usage functions such as call handling, alarm zone configuration, and simple fault troubleshooting. Follow the recommended mounting height of about 145 cm and ensure all connections are waterproof and checked before powering the device. This manual is written in Chinese.
| Maximum number of main units | 238 |
|---|---|
| Alarm zones supported | 8 |
| Recommended installation height | 145 cm |
| Supported alarm sensor types | smoke, gas, infrared, door magnetic, four custom zones |
The device should be mounted at approximately 145 cm above the floor.
It can connect up to 238 main units.
The unit supports eight alarm zones.
Turn off the power, re‑check all connections, and contact the dealer or manufacturer if the fault remains.