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Dpc / DC power systems

DPC DZY-48/50HI Telecom Rectifier Module Equipment information & support

The DPC DZY-48/50HI is an industrial-grade high-frequency telecom rectifier module utilizing fully digitalized soft-switching topology to convert a 90V-290V single-phase AC input into a stable nominal -48V DC output, delivering 50A continuous current and 2900W rated power for telecom cabinets and DC power plants.

Equipment information

Brand
Dpc
Equipment model
DPC DZY-48/50HI Telecom Rectifier Module
Equipment type
DC power systems
Controller / software version
Confirm against the installed equipment
View full product specifications
DPC DZY-48/50HI Telecom Rectifier Module 48V 50A 2900W Switch Power Supply

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

Rated Output Power
2900W Nominal Telecom Rectifier Output Power
Nominal DC Output Voltage
-48V DC (Nominal -53.5V DC, Range -43V ~ -58V DC)
Rated Output Current
50A Continuous Constant Current Output Capability
Power Conversion Efficiency
≥ 95.2% High-Frequency Soft-Switching Conversion Efficiency
AC Input Voltage Range
90V AC ~ 290V AC Single-Phase Wide Grid Tolerance
Hot-Swap Live Maintenance
Slide-in Hot-Swap with Digital Active Load Sharing (<3%)

Alarms & troubleshooting

AC_FAIL (AC Mains Input Failure)
Power LED (Green) OFF, Alarm LED (Yellow) ON or Fault LED (Red) solid ON
AC grid power outage, input voltage out of operational range (<85VAC or >300VAC), module input breaker tripped, or backplane connector pin poor contact
1. Measure AC input phase voltage at the shelf terminals with a multimeter to verify it is within 85VAC-300VAC. 2. Inspect front AC distribution breakers and verify the dedicated module circuit breaker is closed. 3. Reseat the rectifier module, checking the blind-mate backplane connectors for burn marks, bent pins, or debris.
DC_OVP (DC Output Overvoltage Lockout)
Fault LED (Red) solid ON, Power LED (Green) OFF
Internal PWM feedback circuit failure, optocoupler breakdown, supervisor OVP threshold misconfiguration, or external voltage backfeed triggering hardware latch protection (>59.5VDC)
1. Withdraw the faulted rectifier module from the subrack and wait 30 seconds for bus capacitors to discharge and reset the latch. 2. Verify the system controller (CSU) float voltage and OVP settings are set correctly (typically 58.5V-60.0V). 3. Re-insert module into shelf; if it immediately trips to solid Red OVP, module has an internal short/failure; replace the rectifier unit.
OTP (Over-Temperature Protection & Shutdown)
Alarm LED (Yellow) solid ON, Power LED (Green) blinking or OFF
Shelter/cabinet ambient temperature too high (>65°C), air intake dust filter heavily clogged, exhaust vents obstructed by cabling, or heat sink thermal accumulation
1. Check air conditioning unit in the telecom room/cabinet to ensure intake ambient temperature drops to ~25°C. 2. Remove and clean cabinet front air intake dust filters; vacuum front honeycomb ventilation holes on the module. 3. Ensure clearances at the front and rear of the shelf are unobstructed; module will auto-recover once internal heatsink cools down.
FAN_FAIL (Cooling Fan Rotor Lock / Tach Failure)
Alarm LED (Yellow) fast blinking (2Hz) or Fault LED (Red) solid ON
Fan bearing wear/seizure, foreign object obstructing fan blades, tachometer feedback wire disconnected, or internal PWM fan control circuitry failure
1. Remove module (power down safely) and visually inspect fan blades for physical obstructions; manually spin blades with an insulated tool to check resistance. 2. Check whether the 3-pin/4-pin internal fan harness is securely seated on the driver board. 3. Re-install and power on; if fan still fails to spin or continues reporting tachometer fault, replace the internal fan assembly or the entire module.
CAN_COMM_FAIL (CAN Bus Communication Lost / Current Share Imbalance)
Power LED (Green) solid ON, Alarm LED (Yellow) slow blinking (0.5Hz)
Backplane CAN communication pin oxidation/bad contact, missing 120Ω terminating resistor, CAN address collision with another module, or CSU monitor interface failure causing fallback autonomous regulation and load share imbalance >10%
1. Check the system controller (CSU) rectifier status list to see if the module ID is marked offline or conflicts with another slot. 2. Unseat the module and clean the rear CAN interface pins with isopropyl alcohol; inspect backplane receptacle for bent or recessed pins. 3. Verify the 120Ω CAN bus termination resistor switches are correctly set on the shelf backplane; re-insert firmly. If fault persists, replace the CSU or module.

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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