HIMA Z7108/3237/C8

The Z7108/3237/C8 is an LED Cable Plug accessory provided by HIMA for its safety-related I/O module (Model: 3237). Featuring a modular design, this plug is used to reliably connect the safety-related 8-channel digital input module (F 3237) to the field wiring system, meeting functional safety requirements such as SIL 3 / Cat. 4. The C8 version is a wired type, with a 5 m safety cable pre-installed inside the plug, enabling fast and standardized on-site wiring.

Key Technical Specifications

• Compatible Module: HIMA F 3237 (8-channel safety digital input module)
• Cable Length: 5 m (pre-installed)
• Cable Specification: Complies with the requirements for safety cables in IEC 61508/IEC 62061, suitable for safety-related signals such as proximity switches and line monitoring
• Plug Type: LED indicator plug, equipped with safety indicator lights (LED) to display power supply and signal status
• Protection Class: IP20 (for indoor use)
• Operating Voltage: 24 V DC (safety power supply)
• Compliance Standards: SIL 3, Cat. 4, CE marking, and compliance with the IEC 61508 functional safety standard

Product Features

• Fast Wiring: With a pre-installed 5 m cable, on-site wiring only requires fixing the plug, significantly reducing installation time.
• Safety Indication: LED indicator lights display power supply and signal integrity in real time, facilitating on-site fault diagnosis.
• Modular Compatibility: Specifically designed for the HIMA F 3237 input module to ensure signal integrity and redundancy.
• High Reliability: Meets SIL 3 / Cat. 4 requirements, suitable for Safety Instrumented Systems (SIS) in hazardous environments.
• Standardized Interface: Adopts HIMA’s standardized LED Cable Plug interface, enabling unified management with other HIMA components (e.g., Z 7108/3235, Z 7108/3236).

Structure and Composition

• LED Cable Plug Body: The housing is made of flame-retardant plastic, with integrated LED indicator lights, terminal blocks, and shielding layers inside.
• Pre-installed Safety Cable: 5 m in length, featuring a twisted-pair structure and shielding, which meets the voltage resistance, temperature resistance, and anti-interference requirements of safety cables.
• Connection Module: The plug can be directly inserted into the cable tray or distribution tray of the Z 7108 series to achieve reliable connection with the central rack.
• Auxiliary Accessories: Include fixing buckles, terminal block screws, and protective covers, facilitating on-site fixing and protection.

Typical Application Fields

• Process Industry Safety Instrumented Systems (SIS): Safety-related signal collection for high-risk processes in petrochemicals, chemicals, natural gas, and pharmaceuticals.
• Industrial Automation: Used for machine safety, equipment protection, and emergency shutdown circuits.
• Energy and Power: Safety monitoring and protection for power plants and power transmission/distribution systems.
• Transportation and Railways: Train control systems and signal light safety circuits.

Installation Points

• Confirm Matching Modules: Only use with the HIMA F 3237 input module to ensure model matching.
• Fixing Position: Insert the plug into the reserved Z 7108 cable tray or DIN rail bracket, and use buckles to fix it to prevent loosening.
• Cable Routing: Follow safety cable routing specifications, ensuring the cable bending radius is not less than 5 × the cable diameter, and avoid sharp angles and mechanical stress.
• Wiring Inspection: After connection, check whether the LED indicator lights are on normally to confirm power supply and signal integrity.
• Protection Measures: Ensure the plug housing is intact to prevent dust and moisture from entering; install protective covers if necessary.

Maintenance Recommendations

• Regular Inspection: Check the status of LED indicator lights, whether the plug fixing screws are loose, and whether the terminal blocks are corroded every 6 months.
• Functional Testing: Use diagnostic tools provided by HIMA to perform self-tests on the input module, and verify the response time and redundancy function of signal channels.
• Replacement Strategy: If the LED indicator light fails or the cable outer layer is damaged, replace the corresponding Z7108/3237/C8 plug immediately to avoid affecting the reliability of the safety circuit.
• Maintenance Records: Record all inspection, testing, and replacement operations in the equipment maintenance log to meet the maintainability and traceability requirements of IEC 61508.

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