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HIMA 984200004 Safety-Related I/O Module

The HIMA 984200004 functions as a safety-related input/output (I/O) module, serving as the critical link between field sensors (e.g., pressure transmitters, flame detectors) and the safety controller in a SIS. It is certified for use in safety integrity level (SIL) 3 applications, the second-highest level of safety reliability, meaning it has a probability of failure on demand (PFD) of less than 0.01. This certification is backed by extensive testing, including fault injection tests where intentional errors are introduced to verify the module’s ability to detect and respond appropriately.

Model Number 984200004
Brand HIMA
Type Safety-Related I/O Module
Safety Integrity Level (SIL) Certified for SIL 3 (per IEC 61508)
Input/Output Type Digital input module (8 channels)
Input Voltage 24V DC (sinking/sourcing configurable)
Operating Temp Range -40°C to +70°C (suitable for extreme industrial environments)
Mounting Style Backplane mounting (compatible with HIMA safety controllers)
Dimensions 120mm x 80mm x 150mm (W x H x D)
Weight 450g
Compliance IEC 61508, IEC 61511, TÜV SÜD certified, ATEX, IECEx
Diagnostic Coverage ≥99% (ensures high detectability of faults)
Response Time <10ms (from input signal change to safety controller notification)
Power Consumption 2.5W per module

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Description

The HIMA 984200004 functions as a safety-related input/output (I/O) module, serving as the critical link between field sensors (e.g., pressure transmitters, flame detectors) and the safety controller in a SIS. It is certified for use in safety integrity level (SIL) 3 applications, the second-highest level of safety reliability, meaning it has a probability of failure on demand (PFD) of less than 0.01. This certification is backed by extensive testing, including fault injection tests where intentional errors are introduced to verify the module’s ability to detect and respond appropriately.

984200004

984200004

A key feature of the HIMA 984200004 is its redundant design. It incorporates dual processing cores and independent signal paths, ensuring that a single component failure does not compromise the module’s functionality. If one core detects a discrepancy in the signal processing, it automatically switches to the redundant core, maintaining uninterrupted operation. Additionally, the module uses advanced diagnostic algorithms to continuously self-monitor for faults such as short circuits, open circuits, or drift in signal accuracy. These diagnostics are communicated to the safety controller in real time, enabling proactive maintenance before a critical failure occurs.

984200004

984200004

Technical specifications:
Model Number 984200004
Brand HIMA
Type Safety-Related I/O Module
Safety Integrity Level (SIL) Certified for SIL 3 (per IEC 61508)
Input/Output Type Digital input module (8 channels)
Input Voltage 24V DC (sinking/sourcing configurable)
Operating Temp Range -40°C to +70°C (suitable for extreme industrial environments)
Mounting Style Backplane mounting (compatible with HIMA safety controllers)
Dimensions 120mm x 80mm x 150mm (W x H x D)
Weight 450g
Compliance IEC 61508, IEC 61511, TÜV SÜD certified, ATEX, IECEx
Diagnostic Coverage ≥99% (ensures high detectability of faults)
Response Time <10ms (from input signal change to safety controller notification)
Power Consumption 2.5W per module

 

 

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984200004

984200004

Main features and advantages:

The HIMA 984200004 delivers unique value through its uncompromising focus on safety and reliability. Its SIL 3 certification makes it suitable for the most critical safety functions, such as emergency shutdown (ESD) systems, fire and gas monitoring, and overpressure protection. In a liquefied natural gas (LNG) terminal, for instance, the module monitors valve position sensors in the storage tanks. If a valve fails to close properly, it triggers an immediate shutdown of the loading system, preventing a potential leak of flammable gas.
The module’s high diagnostic coverage minimizes the need for manual testing. Unlike traditional safety components that require periodic proof-testing (which can disrupt operations), the HIMA 984200004 continuously verifies its own functionality, reducing maintenance costs and downtime. Its compatibility with HIMA’s safety controllers (such as the HIMax and HIMatrix series) ensures seamless integration into existing SIS, simplifying system design and reducing the risk of integration errors.
For plant operators, the module provides transparency into safety system health. Through the HIMA Safety Manager software, engineers can monitor real-time diagnostic data, track fault history, and schedule maintenance based on actual module performance—rather than arbitrary time intervals. This data-driven approach to maintenance improves overall system availability while ensuring compliance with safety regulations.
984200004

984200004

Application areas:

The HIMA 984200004is deployed in industries where safety is non-negotiable. In oil and gas production, it is used in wellhead safety systems to monitor pressure and flow, triggering shutdowns if abnormal conditions are detected. In pharmaceutical manufacturing, it ensures the safe operation of sterilization autoclaves, preventing overpressure events that could compromise product quality or worker safety.
In nuclear power plants, the module is part of the reactor protection system, monitoring neutron flux and coolant temperature. Its rapid response time ensures that the reactor is scrammed (emergency shutdown) before critical limits are exceeded. In chemical processing, it monitors toxic gas detectors, activating ventilation systems and evacuation alarms if gas concentrations rise above safe levels.
984200004

984200004

 

Related products:

HIMA 984200002 – A 4-channel digital input module, suitable for smaller safety loops with fewer sensors.
HIMA 984200006 – An 8-channel digital output module, paired with the 984200004 to control safety actuators like solenoid valves and relays.
HIMA 984200010 – An analog input module (4 channels) for safety-related measurement of variables like pressure and temperature.
HIMA F 3236 – A redundant power supply module, ensuring uninterrupted power to the 984200004 and other safety I/O modules.
HIMA HIMatrix F 35 – A compact safety controller that integrates with the 984200004 for small to medium-sized SIS.
HIMA Safety Manager Software – Enables configuration, monitoring, and diagnostics of the 984200004 and associated safety systems.
Installation and maintenance:
Installing the HIMA 984200004 requires strict adherence to safety standards. The module must be mounted on a compatible HIMA backplane, with proper grounding to minimize EMI. Wiring should use shielded twisted-pair cables, with shields grounded at both ends to prevent signal interference. During installation, verify that the backplane firmware is compatible with the module (version 5.0 or higher) to ensure full functionality of diagnostic features.
For critical applications, redundant modules should be installed in a 1oo2 (one-out-of-two) configuration, where two modules monitor the same sensors. This provides an additional layer of protection, as a fault in one module will not disable the safety function.
Ongoing maintenance of the HIMA 984200004 is guided by its diagnostic data. The module logs faults and performance metrics, which can be accessed via the Safety Manager software. Routine maintenance includes checking for loose connections, verifying shield grounding, and ensuring the module’s operating temperature remains within the specified range. Proof-testing is recommended every 5 years (per IEC 61511 guidelines), though the module’s high diagnostic coverage may allow extended intervals in some applications.

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