1. Overview

2. Technical Parameters

• CPU Structure: Dual redundant fault tolerance (1002D structure) with 100% self-diagnosis capability.
• Safety Level: Complies with IEC 61508 standard and supports SIL 3 certification.
• Input/Output:

  Communication Interface: Supports Modbus RTU communication protocol, facilitating data interaction with PLCs or upper computers.

  • Digital Input (DI): Supports 8-bit (or 16-bit, depending on the version) for receiving switching signals.
  • Digital Output (DO): Supports 8-bit (or 16-bit) for controlling actuators.
  • Analog I/O: Supports analog input and output through expansion modules (such as Z7136).
• Protection Level: Usually IP20 (protects against solid particles).
• Power Requirement: 24V DC (please refer to the model manual for details).

3. Product Features

• Dual Redundant Design: Contains two independent CPU cores that compare calculation results in real time. If either core malfunctions (such as chip damage or software errors), the system can immediately switch to the normal core to ensure continuous operation.
• High Safety: Equipped with a self-inspection function that can detect internal faults, communication errors, and I/O faults, and can automatically cut off dangerous outputs to ensure safety.
• Modular Structure: Adopts DIN rail mounting, with a compact structure, facilitating combination and use with I/O modules (such as Z7136).
• Strong Durability: Industrial-grade design with fanless heat dissipation, reducing mechanical failure rates and suitable for harsh industrial environments.

4. Structure and Composition

• CPU Module: The F7105A itself is the core processing unit responsible for executing safety logic.
• I/O Modules (such as Z7136): Used to expand digital and analog input and output.
• Coprocessor Module: In some systems, a coprocessor may be included for specific task allocation.
• Communication Interface Module: Used to realize data communication with external systems (such as PLCs).
• Chassis and Rails: The entire system is installed in a DIN rail chassis, facilitating wiring and maintenance.

5. Application Fields

• Petrochemical Industry: Oil refining and petrochemical process control.
• Energy Industry: Power system and nuclear power plant safety control.
• Pharmaceutical and Food Industry: Safety of production lines complying with GMP standards.
• Heavy Industry: Safety interlocking and control in high-risk industries such as steel, cement, and automobile manufacturing.
• Others: Widely used in various automation systems requiring safety levels above SIL 3.

6. Installation & Maintenance

Installation

• Rail Mounting: Fix the F7105A card on the DIN rail to ensure firmness.
• Wiring: Connect power supply, input/output signals, and communication cables according to the electrical schematic diagram.
• Protection: Ensure the installation environment is clean to avoid dust and moisture affecting electronic components.

Maintenance

• Regular Inspection: Regularly check the power status of the card, I/O wiring, and communication status.
• Troubleshooting: Use diagnostic tools provided by HIMA (such as HIMA SafeEYE) to check the system status and view fault codes.
• Software Update: Perform software upgrades or logic downloads as needed to ensure the latest system logic.
• Environment Management: Maintain stable temperature and humidity in the equipment room to avoid extreme environments affecting the service life of the equipment.

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