- The HIMA ELOPII is a rack-mounted, galvanically isolated DC/DC safety power supply module designed for the central rack of HIMA H41q / H51q safety-related control systems (PES). It converts a 24 V DC primary supply into a tightly regulated 5 V DC system voltage that powers the central processing units, communication modules, and I/O logic circuits inside the safety instrumented system (SIS) rack.
🔷Key Specifications
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Specification
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Detail
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Brand
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HIMA
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Model
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ELOPII
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Module Type
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Isolated DC/DC Safety Power Supply Module
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Compatible System
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HIMA PES H41q / H51q Safety Control Systems
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Input Voltage
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24 V DC (range –15 % to +20 %)
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Output Voltage
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5 V DC, stepless adjustable; factory preset 5.4 V DC ±0.025 V
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Rated Output Current
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10 A continuous
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Current Limiting
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Approx. 13 A
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Overvoltage Protection
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6.5 V DC ±0.5 V
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Isolation
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Galvanic isolation between 24 V input and 5 V output
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Conversion Efficiency
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≥ 77 %
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Front Panel
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Test socket + voltage trim potentiometer
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Redundancy
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Supports parallel redundant operation (voltage balance ≤ 0.025 V between modules)
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Rack Width
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8 TE (standard F-series plug-in format)
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Operating Temp.
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–20 °C to +60 °C
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Storage Temp.
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–40 °C to +85 °C
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Humidity
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5 %–95 % RH, non-condensing
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Protection
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Overvoltage, overcurrent, short-circuit proof
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Safety Integrity
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SIL 3 capable (IEC 61508 / IEC 61511 context)
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EMC Compliance
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VDE 0871 / 0877 Class B
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Country of Origin
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Germany
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🔨Product Overview
The HIMA ELOPII is the dedicated 24 VDC-to-5 VDC converter module for HIMA safety racks. Unlike a commercial off-the-shelf power supply, it is qualified for use in safety-related automation architectures where deterministic fault behavior, electrical isolation, and redundant availability are mandatory.
Installed in the central rack backplane, the ELOPII:
- Supplies regulated 5 V DC to H41q/H51q central modules and I/O carriers
- Electrically isolates field-side 24 V DC from sensitive 5 V logic circuits
- Detects overvoltage, overload, and short-circuit conditions
- Supports load-sharing redundancy with other ELOPII modules
Because the module is part of the safety power architecture, a single ELOPII failure in a redundant setup does not disable the safety function. The remaining module continues to carry the 5 V backplane load while the fault is reported to the controller.
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