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Zhujiang / DC power systems

Zhujiang SMPS1002H-I Rectifier Module Equipment information & support

The Zhujiang SMPS1002H-I is a field-proven carrier-grade switch-mode rectifier module delivering -48VDC / 20A (1000W) output, featuring active power factor correction (PFC > 0.99) and ultra-low noise ripple for telecom access points.

Equipment information

Brand
Zhujiang
Equipment model
Zhujiang SMPS1002H-I Rectifier Module
Equipment type
DC power systems
Controller / software version
Confirm against the installed equipment
View full product specifications
Zhujiang SMPS1002H-I Rectifier Module Official Product View 2

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

Nominal Output Voltage
-48 VDC
Output Voltage Range
-40 ~ -60 VDC
Rated Output Power
1000 W
Physical Dimensions Spec
132 × 85 × 280 mm
Power Conversion Efficiency
> 92.5%
AC Input Voltage Range
90 ~ 290 VAC (Single Phase Wide Range)

Alarms & troubleshooting

AC_FAIL (AC Mains Failure / Undervoltage)
Power LED (Green) OFF, Alarm/Fault LED (Yellow/Red) Solid ON
AC grid blackout, loose input terminals, input voltage below protection threshold (<85VAC), or tripped input circuit breaker.
1. Measure voltage across input terminals L/N using a digital multimeter; 2. Verify that the assigned AC input MCB on the power subrack is closed and not loose; 3. Check upstream ATS and utility/generator power feeds; 4. If voltage is within specification (85-300VAC), reseat the module and inspect connector pins; replace the module if fault persists.
OUT_OVP (DC Output Overvoltage Lockout / HVSD)
Alarm LED (Red) Solid ON, Power LED (Green) OFF
Internal PWM loop control failure, secondary rectifier breakdown, excessive float voltage setpoint from controller, or bus interference triggering hardware HVSD latch (>59.5VDC).
1. Disconnect and remove module from shelf for 3 minutes to discharge internal bus and reset HVSD latch circuit; 2. Reinsert module and observe if output voltage returns to 53.5V nominal; 3. If module trips back into red-alarm immediately, internal power FET/diode is damaged; send for repair; 4. Verify system float and overvoltage thresholds in central controller (CSU).
MOD_OTP (Over-Temperature Derating / Thermal Shutdown)
Alarm/Protection LED (Yellow) Solid ON, Power LED (Green) OFF when shutdown occurs
Ambient temperature exceeding operational limits (>55°C), clogged front/rear air dust filters, degraded cooling airflow, or failed heatsink NTC thermal sensor.
1. Inspect site HVAC/cooling systems to ensure telecom room ambient temperature is below 45°C; 2. Remove rectifier module and clean front dust mesh and internal heatsink fins with dry compressed air; 3. Verify no cables or obstacles obstruct the exhaust vents; 4. Allow heatsink to cool below reset threshold (~50°C) and confirm automatic recovery of module output.
FAN_FAIL (Fan Locked-Rotor / Tacho Fault)
Alarm LED (Yellow) Blinks at 1Hz or Red Solid ON, module enters 50% power derating
Fan blades physically seized by foreign objects, worn bearing friction, disconnected fan power connector, or missing tachometer (Hall sensor) feedback signal.
1. Visually check if fan blades are stopped or jammed by debris; safely nudge blades with an insulated tool to verify free rotation; 2. Open front panel to verify the internal 4-pin fan wire harness is securely seated; 3. Measure DC voltage (12V/24V) across fan supply pins; 4. If voltage is present but fan does not spin or generate feedback, replace the cooling fan assembly with original manufacturer part.
COMM_FAIL (CAN-bus Comm Loss & Current Share Error)
Power LED (Green) Solid ON, Alarm LED (Yellow) Slow Flash (0.5Hz)
Backplane CAN bus ribbon cable loose, duplicate module communication address, CAN termination resistor mismatch (should be 120Ω), or CSU transceiver failure forcing autonomous backup mode (load imbalance >10%).
1. Check the module device list on the CSU controller menu for offline flags or ID collisions; 2. Withdraw the module, clean backplane edge pins with isopropyl alcohol, and firmly re-seat into slot; 3. Measure bus resistance across CAN_H and CAN_L (normal unpowered resistance should read ~60Ω with two 120Ω terminators); 4. If all modules drop communication, inspect CSU controller card and reboot controller system.

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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