Description
The HIMA F 7126 is an industrial-grade DC/DC power supply module designed specifically for HIMA safety-related Programmable Electronic Systems (PES), primarily the H51q series.
Core Specifications & Technical Data
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Module Type: DC/DC Power Supply Converter with safe galvanic isolation between input and output voltages.
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Input Voltage: 24V DC (allowable range: $-15\%$ to $+20\%$, residual ripple $r_{pp} < 15\%$)
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Output Voltage: 5V DC (steplessly adjustable via a front-plate potentiometer; factory preset is typically $5.4\text{ V DC} \pm 0.025\text{ V}$)
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Output Current: Up to 10 A
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Primary Fuse: 6.3 A time-lag (slow-blow / träge)
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Efficiency Rate: $\ge 77\%$
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Space Requirement: 8 TE (rack units)
Protection & Diagnostic Features
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Built-in Safeguards: Features robust overvoltage protection (triggered around 6.5V), internal current limitation (approx. 13 A), and a short-circuit-proof output design.
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Front Panel Controls: Includes a dedicated test socket and an adjustment potentiometer to precisely monitor and tune the output voltage during maintenance or live operation.
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Redundant Configuration Support: The module is built to support parallel/redundant configurations to maximize system availability. When deploying multiple units redundantly, HIMA specifies that the difference in output voltage between modules must be kept within $0.025\text{ V}$ to prevent unbalanced load sharing.
Applications
Used widely in SIL-rated Safety Instrumented Systems (SIS) and emergency shutdown (ESD) architectures across high-risk process industries—such as oil and gas, chemical processing, and power generation—where continuous, fault-tolerant 5V power rails are critical for safety
F7126
Product Overview
F7126 is a DC/DC Power Supply Module manufactured by HIMA Paul Hildebrandt GmbH, dedicated to HIQuad H41q / H51q safety instrumented systems.
It converts external 24 VDC input into stabilized 5 VDC power to supply rack backplane, main processors and I/O modules. Featuring galvanic isolation and multi-layer protection circuits, it supports parallel redundant operation to enhance system availability. This power unit is a mandatory infrastructure component for SIL3 safety racks applied in turbomachinery protection, ESD emergency shutdown and process safety control.
Technical Specifications
| Item | Parameter |
|---|---|
| Part Number | F7126 |
| Module Type | DC/DC Power Supply Module |
| Manufacturer | HIMA Paul Hildebrandt GmbH |
| Applicable Platform | HIQuad H41q / H51q Safety System |
| Input Voltage | 20.4 ~ 28.8 VDC (24 VDC nominal, -15% ~ +20%) |
| Output Voltage | 5 VDC, stepless adjustable ±0.5 V; factory preset at 5.4 VDC |
| Rated Output Current | 10 A |
| Current Limitation | Approx. 13 A |
| Protection Functions | Overvoltage protection, short-circuit protection, over-temperature protection |
| Primary Fuse | 6.3 A slow-blow fuse |
| Galvanic Isolation | Between input circuit and output circuit |
| Efficiency | ≥77% |
| Module Width | 8 TE |
| Parallel Requirement | Voltage difference ≤0.025 V for parallel modules |
| Operating Temperature | -20 ℃ ~ +70 ℃ |
| Ambient Humidity | 5%–95% non-condensing |
| Protection Grade | IP20 (cabinet installation) |
| Front Panel | Voltage adjustment potentiometer, test socket, status LED indicator |
| Safety Certification | IEC 61508 SIL3, CE |
| Spare Part Status | OEM production discontinued; new surplus and refurbished modules available |
Key Features
- Optimized for HIMA HIQuad safety racks, providing stable low-voltage power supply for safety-related hardware
- Multiple modules support parallel current sharing to realize redundant power configuration
- Built-in comprehensive hardware self-diagnosis to monitor internal circuit abnormalities
- Adjustable output voltage enables flexible on-site calibration to match rack load demands
- EMI suppression design reduces electrical noise interference in turbine and compressor control cabinets
- Short-circuit-proof output prevents cascading damage to other rack modules under fault conditions
Important reminder: F7126 is power infrastructure module, not I/O or CPU module. Different hardware revisions cannot be directly interchanged without rack configuration verification.
