The Huawei SMU01B is a carrier-grade intelligent site monitoring unit designed for -48V DC telecommunication power systems, providing unified supervisory control, telemetry, and fault management across rectifiers, battery banks, and AC/DC power distribution sub-assemblies.
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At the hardware and architectural level, the SMU01B functions as the central management controller for Huawei ETP power subracks. It integrates an isolated CAN bus controller for high-speed digital communications with rectifier modules, high-precision analog-to-digital converters (ADCs) for bus and battery string sensing, configurable digital inputs and dry-contact alarm relays (DI/DO), an interactive multi-language dot-matrix LCD, and firmware compliant with standard Modbus and Huawei master-slave telemetry protocols.
The unit eliminates catastrophic field risks including irreversible battery degradation caused by deep discharge events (via dual-stage LLVD and BLVD contactor coordination), battery thermal runaway (via ambient temperature compensation), and service downtime resulting from unmanaged rectifier load unbalance or silent AC phase dropouts.
Standard installation in Huawei ETP4830, ETP4890, and ETP48150 power systems deployed in wireless base transceiver stations (BTS), cellular macro sites, optical transport network nodes, and harsh outdoor remote telecom power enclosures.
| Key specifications | Value |
|---|---|
| Display Interface | LCD Screen with Multi-Language Graphical UI |
| System Nominal Voltage | 48V DC |
| Communication Interfaces | RS232, RS485, CAN |
| Supported Protocols | Modbus, Huawei Master-Slave Protocol |
| Operating Temperature Range | -40°C ~ +75°C |
| Hot-Swappable Support | Yes (Live Hot-Pluggable / Plug-and-Play without Power Interruption) |
| Non-Volatile Log Capacity | 10,000+ Cyclic Event Records |
| Unit Power Consumption | < 8W (Ultra-Low Standby Design) |
| Industrial EMC Level | EN 55032 Class A / IEC 61000-4 Level 4 |
| Relative Humidity Tolerance | 5% to 95% RH (Non-Condensing) |
Huawei
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