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Huawei / Indoor power systems

SMU11B Equipment information & support

The Huawei SMU11B is a compact power monitoring unit engineered for indoor telecom power systems, featuring integrated LCD touch control and robust remote management.

Equipment information

Brand
Huawei
Equipment model
SMU11B
Equipment type
Indoor power systems
Controller / software version
Confirm against the installed equipment
View full product specifications
Huawei SMU11B Compact Site Monitoring Unit (LCD Display Touchpad Alarm Contacts) - Internal Assembly & Breaker Configuration

Information below comes from the current product catalogue. Confirm the controller, software version and configuration of the installed equipment separately.

Operating Voltage
DC 48V (Range: -36V to -72V DC)
Display & Control
LCD Color Display + Touch Operation
Communication Ports
RS485 / CAN / Ethernet Port (Supports SNMP/Web)
Alarm Dry Contacts
Multi-channel Programmable Passive Dry Contact Outputs
Operating Temperature
-20°C to +65°C
Form Factor
Embedded Compact Structure, Perfectly Fits Huawei Indoor Power Subracks

Alarms & troubleshooting

CAN_BUS_OFF / NODE_TIMEOUT (Controller CAN Bus Interface Lost / Node Timeout)
Controller front panel red ALARM LED steady ON; display flags bus communication offline; rectifiers operate autonomously.
Subrack communication ribbon cable disconnected, high EMI interference on CAN lines, transceiver IC fault, or open termination resistor.
1. Reseat controller module and reconnect subrack ribbon cables; 2. Measure DC voltage on CAN_H and CAN_L (nominal ~2.5V differential); 3. Ensure communication cabling is isolated from high-power AC cables; 4. Reboot controller unit to perform bus re-initialization; 5. If communication remains offline, replace controller unit.

Access Complete Maintenance & Full Alarm Troubleshooting Manual

This page lists high-frequency critical alarm codes commonly encountered in field maintenance. Comprehensive manufacturer troubleshooting matrices, board-level repair guides, detailed electrical schematics, and firmware commissioning manuals are delivered alongside equipment upon formal project procurement, accompanied by dedicated FAE technical support.

Contact Account Manager for Full Manual

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