HIMA 997205233
Product Overview
HIMA 997205233 is a high-performance digital input (DI) safety module manufactured by HIMA (Germany). It is a crucial component of the mature HIMatrix® F series safety control system. This module is specifically designed to connect on-site switchgear in hazardous areas, such as emergency stop buttons, level switches, pressure switches, access control switches, and position sensors. It safely and reliably reads their dry contact signals into the HIMatrix® safety controller.
As the “sensory nerve” of the Safety Instrumented System (SIS), the HIMA 997205233 module adopts advanced electronic design and diagnostic technology. It continuously monitors the health status of each input channel, including cable breaks, short circuits, and on-site equipment failures, to ensure the integrity of input signals. Its core value lies in providing signal input protection of the highest level (Safety Integrity Level SIL 3) for critical safety applications such as Emergency Shutdown (ESD), Fire and Gas System (F&G), and Burner Management System (BMS), serving as the foundation for building highly reliable safety loops.
Product Parameters
- Product Model: 997205233
- Manufacturer: HIMA
- Product Type: 16-channel digital input module (with diagnostics)
- Safety Certification: SIL 3 (IEC 61508/61511)
- Number of Input Channels: 16
- Input Type: Dry contact (NAMUR compatible)
- Rated Voltage: 8.2 V DC (provided internally by the module for signal detection)
- Diagnostic Functions: Channel-level short circuit, open circuit, and over-range current detection
- Response Time: ≤ 15 ms (configurable)
- Internal Isolation: Photoelectric isolation between channels and backplane
- Connection Method: On-site signal connection via front connector (terminal block)
- Operating Temperature: -40°C to +70°C
- Power Consumption: Typical 1.5 W
Structure and Composition
The HIMA 997205233 module adopts the standard modular design of the HIMatrix® series and features a robust metal housing to ensure mechanical strength and electromagnetic compatibility. The front of the module is equipped with a detachable high-density screw terminal front connector, which is used for efficient connection of 16 on-site signal lines, common terminals, and diagnostic feedback lines.
At the core of the module’s interior is a highly integrated Printed Circuit Board (PCB), which contains independent signal conditioning circuits, photoelectric isolators, and precision diagnostic circuits for each channel. The diagnostic circuit injects a small monitoring current into each on-site loop and accurately determines whether the channel is in a normal “on” or “off” state, or in a fault state such as “short circuit” or “open circuit” by monitoring changes in the loop current.
All this status information is transmitted in real-time to the HIMA F 3×100 series Central Processing Unit (CPU) for processing via the dedicated high-speed Systembus through the gold-plated backplane connector at the bottom of the module.
Application Fields
The HIMA 997205233 module is widely used in process industries and discrete manufacturing industries with strict requirements for functional safety. In the oil and gas sector, it is a standard configuration for Emergency Shutdown Systems (ESD) and Fire & Gas Detection Systems (F&G) on offshore drilling platforms and oil refineries, used to reliably collect the status of manual emergency buttons, gas detector alarms, and critical process switches.
In the chemical industry, it is used to monitor overpressure and overtemperature signals of reactors as well as the status of safety valves, serving as a key input for Process Interlock Systems (PIS). Additionally, in oil and gas pipelines, thermal power plants, and railway signal systems, the HIMA 997205233 is also used to perform critical safety input tasks, ensuring that any abnormal signals can be quickly and accurately captured and trigger predefined safety actions to fully protect personnel, the environment, and assets.
Installation and Maintenance
Pre-Installation Preparation
Before installing the HIMA 997205233 module, ensure that the power supply of the HIMatrix® system is completely turned off. Verify that the module model is correct and check that the base and backplane connectors are clean and undamaged. Prepare a suitable screwdriver for fastening the on-site wiring of the front connector. All operations must be performed by qualified professionals and comply with electrostatic protection specifications.
Maintenance Recommendations
Maintenance of this module mainly focuses on regular inspections. The diagnostic logs and channel status of the module should be checked regularly through HIMA’s configuration software to promptly identify and address intermittent faults. Keep the ventilation holes on the front of the module clean to prevent dust accumulation from affecting heat dissipation.
Before making any wiring modifications or inspections on-site, ensure that the relevant safety loops have been bypassed or are in a safe state to prevent accidental triggering of shutdowns. If the LED indicator shows a fault or the software reports an error, first troubleshoot the on-site wiring and sensors based on the diagnostic information. If the module itself is confirmed to be faulty, replace it with a spare module after powering off.
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