Description
The HIMA F8621A is a specialized Coprocessor Module designed for the HIQUAD (H41q and H51q) safety-related automation systems. It functions as an intelligent interface and communication hub, offloading complex data processing and networking tasks from the Central Processing Unit (CPU) to maintain maximum safety integrity and performance.
Product Parameters (Datasheet)
- Model Number: F8621A
- System Family: HIQUAD (H41q / H51q)
- Function: Coprocessor / Communication Module
- Microprocessor: Integrated high-speed 32-bit controller
- Interfaces: * 2x RS485 (Isolated)
- 1x RS232 (Programming/Diagnostics)
- Protocols: H800, Modbus (Master/Slave), Profibus DP (via gateway), and Ethernet (via additional interface)
- Current Consumption: 5V DC / 0.8A (from backplane)
- Operating Temperature: 0°C to +60°C
- Safety Rating: Up to SIL 3 (when used in redundant pairs within HIMA architecture)
HIMA F8621A
HIMA F8621A
HIMA F8621A
Application Fields
The F8621A is primarily used in large-scale safety systems for:
- DCS Integration: Acting as the Modbus gateway to link HIMA safety logic with a plant-wide Distributed Control System (e.g., Honeywell, Yokogawa, or Emerson).
- Remote I/O Management: Handling communication across multiple HIMA sub-racks in a distributed safety network.
- SCADA Interfacing: Providing real-time data to HMI/SCADA systems for monitoring and data logging.
- Redundant Safety Networking: Linking two HIQUAD systems in a “safety-related communication” (SafeEthernet or proprietary H800) configuration for inter-trip logic.
Product Usage & Installation
- Slot Assignment: The F8621A is typically installed in the central rack of an H41q or H51q system, specifically in the slots designated for communication or coprocessors.
- Redundancy: In SIL 3 high-availability systems, F8621A modules are often used in pairs. Ensure that the DIP switches on the modules are correctly set for “Main” and “Sub” configurations to allow for seamless failover.
- Cable Shielding: RS485 cables must be high-quality shielded twisted-pair. The shield should be connected to the ground bar of the cabinet to prevent electromagnetic interference from tripping the safety communication.
- Software Configuration: Configure the communication parameters (Baud rate, Parity, Address) using ELOP II software. The coprocessor requires its own specific configuration data set within the HIMA project.
- Diagnostic LEDs: Monitor the “RUN” and “COM” LEDs. A flickering “COM” LED indicates active data exchange, while a red “ERR” LED signals a protocol mismatch or hardware fault.
Product Technical Description
Technically, the F8621A is an independent computer on a card. By handling the overhead of external protocols (like Modbus), it ensures that the main safety CPU remains dedicated to executing the safety logic (User Program) without latency. In a HIQUAD system, the “A” revision of the F8621 features enhanced memory handling and faster serial throughput compared to the original version. It acts as a Bus Master for the internal communication bus, gathering I/O status and passing it to the external network while maintaining strict galvanic isolation to protect the safety core.
Q&A (Common Questions)
Q: What is the difference between the F8621 and the F8621A? A: The “A” revision typically signifies updated internal hardware components for longer lifecycle support and better resistance to electrical noise, while remaining backwards compatible with existing HIQUAD racks.
Q: Can this module be used for SafeEthernet? A: The F8621A provides serial-based communication. To achieve SafeEthernet (HIMax/HIMatrix standard) on a HIQUAD system, you typically need an additional Ethernet interface module or gateway.
Q: Is the F8621A hot-swappable? A: While it can be physically removed, doing so during operation will break the communication link to the DCS/SCADA. If the safety logic depends on this link (Inter-tripping), a system shutdown may occur unless a redundant module is present.
Q: Does it support Modbus TCP? A: Natively, it supports Modbus RTU (Serial). To use Modbus TCP, an external serial-to-ethernet converter or a different HIMA communication module is required.
Similar Model Recommendations
- HIMA F8627: Dedicated Ethernet communication module for HIQUAD.
- HIMA F8650: Central Processing Unit (CPU) for H41q/H51q systems.
- HIMA F8621: The original version of the coprocessor module.
- HIMA F8652: Redundant CPU variant.
- HIMA F7126: Power supply module for the HIQUAD rack.
For technical datasheets or to check current stock for the HIMA F8621A, please contact our support team.
