The F7126 power supply module supplies automation systems with 5 V DC from a main supply of 24 V DC. It is a DC/DC converter with safe isolation between input and output voltage. The module is equipped with overvoltage protection and current limitation. The output is short circuit proof.
On the front plate there are a test socket and a potentiometer for adjusting the output voltage. To avoid unbalanced load with redundant use of the power supply F 7126 the difference between their output voltages may not be more than 0.025 V.
Technical Specifications
Electrical Specifications:
Input Voltage: 24 V DC ±20% (redundant inputs supported).
Output Voltage: 24 V DC (regulated, galvanically isolated).
Output Current: 5 A continuous (10 A peak for 50 ms).
Isolation: 1500 V AC (input-to-output, output-to-system).
Redundancy:
Dual redundant input feeds with automatic load sharing and failover.
Safety Standards:
Certifications: IEC 61508 SIL 3, TÜV Rheinland, ATEX/IECEx Zone 2.
Hardware Fault Tolerance (HFT): 1 (per IEC 61508).
Environmental Ratings:
Operating Temperature: -40°C to +70°C (-40°F to +158°F).
Humidity: 5–95% non-condensing.
Shock/Vibration: 15g (IEC 60068-2-27), 5g (IEC 60068-2-6).
Product Application
- Oil & Gas:
Powers emergency shutdown (ESD) systems and fire/gas detection panels on offshore platforms.
- Chemical Plants:
Supplies critical power to safety interlocks for reactor pressure and toxic gas monitoring.
- Power Generation:
Ensures backup power for turbine overspeed sensors and boiler safety controls in thermal plants.
- Rail Transportation:
Maintains uninterrupted power for railway signaling and track switch systems.
- Pharmaceuticals:
Supports GMP-compliant safety controls in sterile manufacturing environments.
Frequently Asked Questions (FAQ)
Q1: How to configure redundant power inputs for the F7126?
A: Connect two independent 24 V DC sources to the module's input terminals. The F7126 automatically balances loads and switches to the backup source if a primary failure occurs.
Q2: What actions trigger an overtemperature shutdown?
A: Internal temperatures exceeding +85°C due to blocked ventilation or ambient heat. The module reactivates once cooled.
Q3: Can the F7126 operate with non-HIMA power sources?
A: Yes, provided they meet the 24 V DC ±20% specification and isolation requirements.
Q4: How to replace a faulty module without system downtime?
A: In redundant setups, activate hot-swap mode via HIMatrix ES, remove the faulty module, and insert the replacement.
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