Description
Product Overview
The HIMA F7126 is a power supply module designed for HIMA PES H51q automation systems. It operates as an isolated DC/DC converter, taking a 24 VDC primary supply and providing a regulated 5 VDC output for automation system components. HIMA documentation specifies a 10 A output rating and protection against overvoltage, excessive current, and output short circuits.
The module includes a front-panel test socket and an adjustment potentiometer for checking and setting the output voltage. It can also be used in redundant power-supply arrangements, where HIMA specifies that the output-voltage difference between redundant F7126 units should not exceed 0.025 V to help prevent unequal load sharing.
Key Features
- HIMA F7126 power supply module
- Designed for PES H51q automation systems
- 24 VDC input
- 5 VDC adjustable output
- 10 A rated output current
- Approximately 13 A current limitation
- Galvanically/safely isolated DC/DC conversion
- Short-circuit-proof output
- Overvoltage protection
- Front-panel test socket
- Front-panel output-voltage adjustment
- 8 TE rack space requirement
- Suitable for redundant power-supply arrangements when correctly configured
Technical Datasheet
| Parameter | Specification |
|---|---|
| Brand | HIMA |
| Model / MPN | F7126 |
| Product Type | Power Supply Module |
| System | PES H51q |
| Input Voltage | 24 VDC |
| Input Tolerance | -15% to +20% |
| Input Ripple | <15% |
| Primary Fuse | 6.3 A slow-blow |
| Output Voltage | 5 VDC ±0.5 V, continuously adjustable |
| Factory Adjustment | 5.4 VDC ±0.025 V |
| Rated Output Current | 10 A |
| Current Limitation | Approx. 13 A |
| Overvoltage Protection | 6.5 V ±0.5 V |
| Efficiency | ≥77% |
| Output Protection | Short-circuit proof |
| Isolation | Safe isolation between input and output |
| EMC / Interference | Limit Class B according to VDE 0871/0877 |
| Rack Space | 8 TE |
These values are taken from the published F7126 data sheet. Note that the 5.4 VDC factory adjustment is different from the nominal 5 VDC output specification; the front-panel potentiometer allows adjustment within the documented range.
System Application
The F7126 converts the available 24 VDC system supply into 5 VDC for the electronics in a compatible HIMA automation system. HIMA documentation specifically identifies it as a power supply module for the PES H51q platform.
The module can also be incorporated into redundant power-supply arrangements. HIMA’s B5233 assembly documentation shows configurations using three F7126 modules with their 5 V outputs connected in parallel. In that documented arrangement, the total control-system current must be limited appropriately so the system can continue operating after the failure of one power-supply module.
For replacement applications, confirm the existing rack, power-distribution arrangement, module position and system documentation before installation.
Installation & Configuration
Before installing an F7126 replacement, verify that the cabinet supply is compatible with the specified 24 VDC input range. Check the input polarity, protective-earth connection and rack position before energizing the module.
The front-panel potentiometer is intended for output-voltage adjustment and should only be adjusted with an accurate measuring instrument. HIMA documentation specifically warns about the importance of matching output voltages when F7126 modules are used redundantly.
Recommended installation checks include:
- Verify the F7126 part number and module position.
- Check the 24 VDC supply before connecting the module.
- Inspect the rack connector and terminals for oxidation or mechanical damage.
- Measure the 5 VDC output before connecting sensitive system electronics.
- For redundant configurations, verify the output-voltage difference between modules.
- Record the original voltage setting before replacing an existing unit.
Maintenance & Inspection
Routine inspection should focus on the condition of the module and its power connections rather than unnecessary adjustment of the output potentiometer.
Recommended checks include:
- Inspecting the front panel and connector area for physical damage.
- Checking input and output wiring for loose connections.
- Monitoring the 5 VDC output for abnormal voltage variation.
- Checking for signs of overheating around the power supply and rack.
- Inspecting the primary fuse when the module fails to start.
- Checking redundant units for balanced output voltage.
- Keeping the rack and surrounding ventilation area free of excessive dust.
If the output voltage becomes unstable, do not immediately compensate by adjusting the potentiometer. First check the 24 VDC input, connected load, wiring and other redundant power-supply modules.
Replacement Notes
When sourcing a replacement, match F7126 rather than selecting a visually similar HIMA power supply. HIMA documentation identifies F7126 specifically as the 24 VDC-to-5 VDC power supply for the H51q platform.
HIMA’s conformity documentation also identifies F7126 (H51) as a Power Supply Module within the H41/H51/H41q/H51q automation-system module family.
For a safety-related automation system, replacement should be carried out according to the site’s approved maintenance procedure and the applicable HIMA system documentation.
Identification Information
Main Part Number: F7126
Product Type: Power Supply Module
Input: 24 VDC
Output: 5 VDC
Rated Output Current: 10 A
Current Limitation: Approx. 13 A
System Reference: PES H51q
Rack Requirement: 8 TE
Manufacturer: HIMA Paul Hildebrandt GmbH + Co KG
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HIMA F7126 | Power Supply Module 24VDC Input 5VDC 10A for PES H51q
