Description
Product Advantages
1.Real-time, Intuitive On-site LCD Display:
Features a built-in, high-contrast Liquid Crystal Display (LCD) screen with a clean interface and wide viewing angle.
2.M-BUS Non-Polarized Two-Wire Technology:
Communication and power supply require only two wires, with no distinction between positive and negative polarity. In complex construction environments involving low-voltage electrical systems, this technology significantly shortens construction cycles and completely eliminates the risk of circuit board damage caused by wiring errors, resulting in a 50% reduction in overall installation costs.
3.Intelligent Built-in Bus Short-Circuit Protection:
The hardware features an integrated, high-response mechanism for isolating and managing line short-circuit faults. Should a sudden short-circuit occur within the sensor unit itself or its connected wiring, the module automatically initiates physical self-isolation.
4.Multi-Layer Password Security and Adjustable Thresholds:
Equipped with multi-level hardware and software security locks, along with password verification protocols, to prevent unauthorized personnel from accidentally triggering operations within the power distribution cabinet. Alarm thresholds—spanning an upper limit (default: ≥ 115%) and a lower limit (default: ≤ 85%)—are fully flexible and adjustable, allowing for precise, site-specific fine-tuning based on the unique power fluctuation characteristics of each project.
5.Ultra-Fast 5-Second Alarm Response:
From the moment a power anomaly—such as a phase loss or abnormal overload—is detected to the triggering of the alarm signal, the total response time is ≤ 5 seconds.
Applications & Selection
Serving as the precision sentinels at the terminal points of fire control systems, these products are widely integrated into the terminal power distribution boxes (specifically, the main/standby power transfer units) of fire-fighting electrical equipment within major commercial complexes, hospitals, schools, and residential communities.
1.Fire Power Cabinets: Fire pump control cabinets, smoke extraction fan control units, fire elevator distribution cabinets, and fire shutter power supply boxes.
2.Fire Low-Voltage Main Cabinets: Power supplies for fire door monitoring hosts, centralized controllers for fire linkage systems, and centralized distribution boxes for emergency lighting.
Product Specifications
| Product Model | BY-2VA | BY-VA | BY-2V | BY-V |
| GB 14287-2014 |  |
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| Function | M-BUS two-wire bus power supply and communication, non-polarity connection, with short circuit protection, LCD real-time display, simple and intuitive interface, can detect overvoltage, undervoltage, phase sequence error, phase loss and other faults, and real-time display the operating voltage and current of fire fighting equipment. | |||
| Detection Function | Two channels of three-phase voltage + one channel of three-phase current | One channel of three-phase voltage + one channel of three-phase current | Two channels of three-phase voltage | One channel of three-phase voltage |
| Compatible Products | BY-F1H/BY-F2H | |||
| Operating Power Supply | DC18V-DC36V | |||
| Power | ≤40mW | |||
| Alarm Threshold | ≤85%, ≥115% | |||
| Alarm Time | 5S | |||
| Communication Bus | M-BUS | |||
| Communication Distance | ≤1000m | |||
| Installation Method | 35mm DIN rail mounting | |||
| Overall Dimensions (mm) W×H×D (Width × Height × Depth) | 82×100×66.5 | |||
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