00031426-00 | Bachmann electronic NT255 Power Supply Module

The NT255 from Bachmann electronic sets a new benchmark in power supplies for CPUs and backplane-supplied modules. Leveraging extensive development and field experience, this module combines proven expertise with cutting-edge technology to deliver superior performance and reliability.

Key Features

• Efficiency and Design:
  • Utilizes recent planar transformer technologies for significantly increased efficiency.
  • Features coolPCB technology, which integrates heat dissipation into the circuit board, minimizing local warming and extending component lifespan.
  • Lightweight components enhance robustness against shocks and vibrations.
• Power Performance:
  • Input voltage range: 18 to 34 VDC
  • Output power: 45 W (with 55 W peak power for temporary overloads).
  • Up to 80% longer buffer time during short voltage drops, ensuring safety and reliability.
• Comprehensive Protection:
  • Galvanic isolation between input/ground and input/system for enhanced safety.
  • Electronic reverse polarity protection to prevent damage from incorrect connections.
  • Monitored supply voltage and output voltages with state indicators for supply failures and internal errors.
• Monitoring and Indication:
  • 2 state indicators to differentiate between supply failures and internal errors.
  • Power-fail signal and state information for CPU modules, processable from the application.

Technical Specifications

Input Specifications:

• Voltage Range: 18 to 34 VDC
• Peak Input Voltage: +40 V (for < 1 second)
• Max Power Consumption: 68 W
• Starting Current Limitation: Max. 8 A after 5 ms
• Fuse: SMD wire fuse 7 A at device defect
• Input Voltage Monitoring: Yes, with power-fail message

Output Specifications:

• Output Power: 45 W (55 W peak)
• Output Voltage / Current:
  • +5 V / 6 A (8 A peak)
  • +15 V / 0.5 A
  • -15 V / 0.5 A
• Power-Fail Bypass: 18 ms, with power-fail message after 3 ms

Monitoring Features:

• State Indication: Power-fail on processor
• State Display: LEDs (Power, Error, Ready)
• Galvanic Isolation:
  • 500 V (input/system)
  • 100 V (input/ground)

Approvals and Certificates

• General: CE, cULus, CCC
• Marine: DNV GL, LR, ABS, BV

Environmental Conditions

• Operating Temperature: -30 to +60 °C
• Relative Humidity (Operating): 5 to 95% (without condensation); 5 to 95% (with condensation)
• Storage Temperature: -40 to +85 °C
• Relative Humidity (Storage): 5 to 95% (without condensation); 5 to 95% (with condensation)
• Pollution Degree: 2 (without condensation; according to IEC 60664-1)

Order Codes

• Item: NT255
• Item No.: 00031426-00
• Description: Power supply 45W (55W); 24V; 5V 6A; ±15V 0.5A

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