HIMA F 7126 HIMatrix 5V DC 10A Power Supply Module

Product Overview

The HIMA F 7126 (Part Number: 99 000111) functions as the primary power conversion unit for HIMA safety-related subracks. It transforms standard 24V DC field power into a highly stable, adjustable 5V DC output to energize internal logic circuits and CPUs. By maintaining precise voltage tolerances and providing high-current capacity, this module ensures the uninterrupted operation of safety-instrumented systems (SIS) even during significant input voltage fluctuations.

Condition: 100% Brand New and Original Factory Sealed.

Technical Specifications

The F 7126 features industrial-grade filtering and high-current output capabilities to support demanding automation architectures.

• Manufacturer: HIMA Paul Hildebrandt GmbH

• Part Number: 99 000111

• Input Voltage: 24V DC (-15% to +20%, ripple < 15%)

• Output Voltage: 5V DC +0.5V (Adjustable)

• Factory Set Point: 5.4V DC ±0.025V

• Output Current: 10A (Current limit at approx. 13A)

• Overvoltage Protection: 6.5V +0.5V

• Primary Fuse: 6.3A Slow-Blow (Träge)

• Efficiency Rate: ≥ 77%

Engineering Advantages

• Adjustable Precision Output: While the module comes factory-set at 5.4V DC to compensate for potential voltage drops across the backplane, the F 7126 allows manual adjustment of the output. This flexibility ensures all logic modules receive optimal voltage regardless of the rack's physical load distribution.

• Robust Input Tolerance: The module accepts an input range from 20.4V to 28.8V DC. This wide window handles the common voltage dips and surges found in large-scale industrial battery systems and unregulated power loops.

• Integrated Safety Protection: A built-in 6.5V overvoltage protection circuit shields sensitive CPU components from catastrophic failure. Additionally, the 13A current limit prevents the module from overheating during downstream short-circuit events, localized to the specific subrack.

• High Power Density: Delivering 10A of continuous current from a compact module footprint, the F 7126 supports fully populated racks with multiple high-power communication and I/O modules without requiring auxiliary external cooling.

• Efficient Heat Dissipation: With an efficiency rate of 77% or higher, the module minimizes energy loss. This reduced thermal signature prevents the "hot-spot" effect within control cabinets, extending the operational life of the entire safety system.

FAQs

• What should I check before replacing an existing F 7126 unit?

  Verify the primary 6.3A slow-blow fuse and ensure the input 24V DC polarity is correct. Since the F 7126 drives the internal logic of the system, verify that the 5V DC output matches the requirements of your specific rack configuration before connecting field I/O.

• Does the module provide a status signal for power failure?

  The HIMA system bus monitors the output of the F 7126. If the voltage drops below the operational threshold or exceeds the 6.5V limit, the safety processor identifies the fault and initiates the programmed safe-state for the entire subrack.

• Can the F 7126 operate in environments with high electrical noise?

  Yes. The F 7126 includes internal filtering that handles ripples up to 15%. This feature ensures that electromagnetic interference (EMI) from nearby heavy machinery does not corrupt the stable 5V DC logic power.

• Is the 10A output sufficient for a fully loaded HIMA subrack?

  Generally, yes. 10A provides ample headroom for most HIMatrix and legacy HIMA rack configurations. However, always calculate the total current draw of your specific CPU and I/O module combination to ensure it stays within the 10A continuous rating.