Centurion III DC Power System and DC-DC Converter by Newmar Powering the Network. 12V DC, 24V DC and 48V DC all at one time, 4000 watts total, 2000 Watts N+1 Redundant System

Power 12V, 24V, and 48V at one time, 4,000 Watt, N+1 Redundant, Fully Integrated DC Power System with DC-DC Converter.


  • 19", 2U rack mount shelf with integrated power distribution
  • 90-250 VAC input, Power Factor Corrected
  • 2 power bays accept 1000 or 2000 watt modular rectifiers 74 amp, 4000 watt total max. output capacity, (37 Amp, 2000 Watt, N+1) @ - 48 VDC
  • 2 power bays accept DC-DC modules -48V to +12V and -48V to +24V
  • Output temperature compensated for precise battery charging
  • -48VDC circuit breaker distribution capacity with tripped breaker alarm
  • 12 DC circuit breaker distribution capacity (48 VDC: 10 position; 12/24 VDC: 2 position), with tripped breaker alarm
  • 1 each DC-DC converter output circuit breaker distribution with tripped breaker alarm
  • Master disconnect breakers for two 48 volt battery banks, with tripped breaker alarm
  • Controller with digital display of up to three system DC system parameters with TCP/IP interface and SNMP monitoring/logging
  • Alarm contacts monitor major system functions
  • Low voltage disconnect built in
  • Easily configures to meet site power requirements

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Complete system design and assembly to your application parameters: Rectifier and DC-DC configuration, circuit breaker installation, and programming of alarms and monitors. Installation in a relay rack with batteries and wiring also available. All system components are sold separately.

Centurion III: System Configurations

Rectifier Input Amps @ Full Load 115/230V Output Weight
Voltage Amps
Lbs Kg.
C2RX-2048 11.4 Amps (output derated approx. 40% @ 115V)/9.8 Amps @ 230V -54.4V DC,
adjustable 48 - 58V DC
37A* 2000 3.5 1.59
* @ 120 VAC: Derate 2 kW rectifiers by 40%; 1kW rectifiers by 33%
DC Converter Input Voltage Range Output Weight
Voltage Range Amps
Lbs Kg.
C3C-12-40 40 - 60V DC 11 - 14V DC 40* 560 3.5 1.59
C3C-24-25 40 - 60V DC 22 - 26V DC 25A 560 3.5 1.59
* 30 amp maximum limit due to 30 amp max. distribution circuit breaker
Shelf Input Voltage Range Configuration Size Weight
C3RS-48-124 90-300V (derate @ 115 input),
45-65 Hz.
2 Centurion III Rectifiers (-48 V), 2 Centurion III DC-DC Converter Modules (48 to 12 V and/or 48 to 24V), Controller, 10 (-48V DC) and 2 (+12V or 24V DC) Circuit Breaker Distribution, 2 x 63A Battery Breakers 19/23”, 2 RU 19.84

Preliminary specifications subject to change without notice.

Specifications: Centurion III DC Power System with DC-DC Converter

AC Input

Nominal: 230V
Voltage Range: 90-300V (derate @ 115 input)
Frequency Range: 45-65 Hz
Power Factor: >0.99
Efficiency: >94% (from 30-95% output power)

DC Output

Voltage: -48 volt, constant power
Output Ratings: 48V to 58V
Nominal Voltage: 48V
Rated Voltage: 58V


Rated maximum System Output Power: 4000W @ -48V Polarity: Positive Earth

Individual Rectifier Power: 1000 watt 2000 watt
Amperage @ 230 vac in 7 12
Amperage @ 115 vac in* 12 13
* 1kW derated to 650W @ 115VAC, 2kW derated to 1300W @ 115VAC

DC Distribution

Load: Up to 12 load circuit breakers: 48 VDC 10 position; 12/24 VDC 2 position (6 - 63A) Battery: Up to 2 battery circuit breakers (max. 100A)

Monitoring and Control

Display: Multi-lingual alpha numeric backlit display
Communications: Serial: 1x USB port on front panel for local PC interface TCP/IP: Ethernet interface for communication using SNMP protocol and internal web based configurator (optional) HTTPS capable Modbus: Supported via TCP/IP
LED Indicators: Green: Power on/monitor OK Yellow: Non urgent alarm Red: Urgent alarm
Audible: 90dBA buzzer mappable to user defined conditions
Controls: 3x push buttons for parameter setting or viewing on front panel
Signal Inputs: Serial bus for rectifier control and interface to peripheral modules 6x spare general purpose inputs (analogue/digital) 2x temperature sensors (one fitted)
Alarms: Relays: 3x alarm and control relays, two of which can be mapped for customized alarm settings (expandable)
Alarm Contacts: Volt Free Contacts: 0.3A @ 100V (0.15A @ 160V)
Logging Capacity: Periodic Log: Up to 16,384 records (dependant on number of parameters logged) Event Log: Up to 16,384 records (dependant on number of parameters logged)
Connections: Relay Outputs: Mini combicon to accept 1.5mm wire USB Port: USB mini B


Ambient Temperature: Nominal: 25+/-5˚ C
Range: -10˚ C to +70˚ C (maximum output power is derated above +5˚ C)
Humidity: 5-95% RH (non-condensing)
Altitude: <8,202 ft., De-rate maximum ambient temperature by 4˚ C per 3,280 ft. above sea level


Shelf Dimensions: 19" W x 3.5" H x 15.35" D
Weight: 19.84 Lbs. (excluding rectifier modules)
Rectifers Dimensions: 4.25" W x 2.75" W x 11.1" D
Weight: 3.15 Lbs
Cooling: Forced cooled


Safety: EN60950
Electrostatic Discharge: CISPR24
Radiated Radio Frequency: CISPR22
AC Harmonics: EN61000-3-2
AC Flicker and Fluctuation: EN61000-3-3
Other: CE & RoHS compliant

 DC-DC Converter

DC Input

  CIII4824 CIII4812
Nominal Input Voltage: 48V DC 48V DC DC
Input Voltage Range: 40-60V DC 40-60V DC


Fuses: Fuse in the positive input with crowbar diode
Input Voltage: Auto shutdown, auto restart when correct voltage restored

DC Output

  CIII4824 CIII4812
Nominal Output Voltage: 24V DC 12V DC
Output Voltage Range: 22-26V DC 11-14V DC
Maximum Output Current: 25.0A 40.0A
Maximum Output Power: 650W 560W
Peak Efficiency: 93.0% 90.0%