Description
HIMA K9202B
Technical Specifications
- Module type: Safety PLC system power module
- Input voltage: DC24 V (19.2 to 31.2 V range)
- Output voltage: DC5 V, DC24 V backplane
- Rated output current: 5 V / 8 A, 24 V / 2 A
- Redundancy: Dual power parallel redundancy
- Isolation: Isolated between input and output
- Temperature: -20 °C to +70 °C
- Storage: -40 °C to +85 °C
- Humidity: 5 % to 95 %, non-condensing
- Protection: IP20
- Installation: Eurocard plug-in
- Safety level: SIL3
- Efficiency: 85 % typical
Functional Features
- Stable DC5 V and DC24 V supply for HIMA safety PLC rack
- Dual power redundancy parallel; single fault leaves system running
- Input undervoltage and overvoltage monitoring with LED alarm and CPU report
- Output overcurrent and short-circuit protection
- Front panel LEDs for power normal, input voltage, output voltage
- Electrical isolation between input and output
- Wide-temperature design -20 °C to +70 °C
- Hot-swap support for redundant online replacement
- Industrial-grade components for long-term reliability
- Meets SIL3 safety requirements
Application Scenarios
- HIMA HIMax safety PLC rack supply
- H41q/H51q redundant power
- Petrochemical SIS safety system power
- Power plant ESD emergency shutdown supply
- Offshore platform safety controller rack power
Materials and Construction
- Front panel: Flame-retardant engineering plastic
- PCB: FR4 multilayer board with conformal coating
- Power components: DC/DC converters, filter capacitors
- Passive components: Electrolytic capacitors, TVS diodes, metal film resistors
- Connector: Gold-plated Eurocard backplane connector
- Heat dissipation: Aluminum substrate power components
Structural Features
- Eurocard plug-in in HIMA rack power slot
- Front panel LED status indicators
- Board partitions between power conversion, filtering, and control areas
- Power components mounted on metal heat spreader
- Card locking mechanism resisting plant vibration
- Dual power current-sharing circuit
Working Principle External DC24 V enters input terminals; after filtering and surge protection it feeds a DC/DC converter that steps down to system DC5 V and DC24 V, supplied through backplane gold fingers to all I/O and CPU modules. In dual redundancy both modules current-share; on single-module failure the other automatically carries full load. Monitoring circuitry continuously detects input/output voltage; abnormalities trigger LEDs and backplane report to CPU.
Installation Requirements
- Insert card into rack power slot with power off
- Connect external DC24 V per drawing
- Connect dual supplies to independent V loops
- Rack grounding
- Cabinet temperature -20 °C to +70 °C
- Verify input voltage polarity after power-up
Precautions
- Confirm redundant other module is healthy before online replacement
- Do not reverse V polarity
- Do not overload the power module
- Periodically inspect output voltage stability
- Store spares in moisture-proof anti-static packaging
- After replacement, confirm power status from CPU software
