ZTE / DC Power Systems (-48V)

ZXD2400 (V4.6) Equipment information & support

The ZXD2400 (V4.6) is a high-efficiency telecom rectifier module engineered by ZTE, delivering a nominal -48V output, 50A rated current, and 3000W output power utilizing advanced digital PFC resonant soft-switching technology.

Equipment information

Brand: ZTE
Equipment model: ZXD2400 (V4.6)
Equipment type: DC Power Systems (-48V)
Controller / software version: Confirm against the installed equipment

View full product specifications

ZTE ZXD2400 (V4.6) High-Efficiency Switch-Mode Rectifier Module (-48V 50A 3000W >96% Efficiency) - Isometric 45-Degree Angled View

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

Cooling & Monitoring: Smart Fan / Digital Monitoring
Output Voltage / Current: -48VDC (-42V ~ -58V)
AC Input Voltage: 85V-300V AC
Peak Efficiency: ≥ 92.5%
Rated Output Power: 3000W
Operating Temperature Range: -25°C ~ +65°C

Alarms & troubleshooting

AC_IN_FAIL / AC_DERATE (AC Input Abnormal / Loss / Voltage Derating)

Power LED (Green) OFF or flashing; Protection LED (Yellow) steady ON; Fault LED (Red) OFF.

Utility grid blackout, phase loss, loose terminal screws, or AC input voltage out of operational window (<85VAC derating/cutoff, >295VAC OVP trip).

1. Measure L-N AC voltage at module slot with True-RMS multimeter; 2. Verify AC supply is within nominal range (85~295VAC); 3. Inspect upstream branch circuit breaker (MCB); 4. Retorque wiring terminals and verify neutral connection; 5. If voltage is nominal but yellow LED persists, reseat module and inspect connector pins; replace module if defective.

DC_OV_LOCKOUT / HVSD (DC Output Overvoltage Lockout / HVSD)

Power LED (Green) OFF; Fault LED (Red) steady ON (latched); Protection LED (Yellow) OFF.

Internal PWM loop failure, optocoupler feedback breakdown, or DC bus transient exceeding hardware HVSD threshold (~59.5VDC ±0.5V). Latches off to protect telecom equipment.

1. Extract faulted rectifier and trip its AC feed; 2. Wait at least 3 minutes to discharge internal bus capacitors; 3. Reseat module firmly and power up for a cold restart; 4. Check controller float/equalize target voltage settings (<58.5VDC); 5. If red LED immediately latches on restart, internal regulation failed; replace unit.

OTP_DERATE / OTP_SHUTDOWN (Over-Temperature Derating & Thermal Shutdown)

During derating: Green Power ON, Yellow Protection ON; Thermal shutdown: Green OFF, Yellow ON, Red Fault ON.

Ambient temperature exceeds 55°C, clogged dust filters, air recirculation, or heatsink thermistor (NTC) detecting internal power semiconductor temperature exceeding safety threshold (>105°C).

1. Check site air conditioning and ensure subrack intake air is <35°C; 2. Clean cabinet intake air filters; 3. Install blanking panels in unpopulated slots to eliminate hot air loops; 4. Allow module to cool and verify automatic recovery; 5. If ambient is cool and fan spins but alarm recurs, replace module.

COMM_FAIL / CAN_BUS_LOST (Rectifier CAN Bus Comm Lost / Offline)

Yellow Protection LED flashing (~1Hz); Green Power LED steady ON; Rectifier maintains default float voltage autonomously.

Loose CAN bus flat cable, dirty backplane connector pins, missing or damaged 120-ohm bus termination resistor, or slot address conflict.

1. Reseat module and confirm it latches completely into backplane; 2. Measure equivalent resistance across CAN_H and CAN_L (should read 55~65 ohms with two 120-ohm terminators in parallel); 3. Inspect communication ribbon cable between controller and subrack; 4. Run 'Module Rescan & Auto-Addressing' on controller LCD; 5. If only one slot fails, inspect backplane connector pins.

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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