Description

HIMA F8621A 984862160 Product Description

Technical Specifications

• Product Model: F8621A 984862160
• Brand: HIMA
• Warranty: One Year
• Input Voltage: 24VDC nominal supply (±10% tolerance), 5VDC internal logic power
• Operating Temperature: -20°C to +60°C
• Storage Temperature: -40°C to +85°C
• Response Time: ≤5ms cyclic communication data processing delay
• Protection Class: IP20 for indoor control cabinet rack installation
• Accuracy Class: 0.02% data transmission error rate for safety critical frames
• Output Frequency: Baud rate adjustable 300bps ~ 57600bps on RS485 channels
• Rated Current Range: Maximum 1A total module power consumption
• Communication Interface: 2× galvanically isolated half-duplex RS485 ports, HIQuad system internal backplane connector, dual-port RAM bus
• Supported Protocols: Modbus RTU, PROFIBUS DP, HIMA proprietary HIQuad safety bus protocol
• Overload Capacity: 125% transient input voltage surge withstand for 20 seconds
• Dimensions: 4TE standard Eurocard module, 122mm (W) × 110mm (H) × 25mm (D)
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Product Overview

The F8621A 984862160 is an independent communication coprocessor module developed for HIMA HIQuad H51q and H41q safety instrumented systems, dedicated to offloading heavy communication tasks from the main safety CPU to prevent calculation latency on critical safety logic. Equipped with a standalone 10MHz HD64180 microprocessor and 384KB non-volatile static memory, this unit processes bidirectional data exchange between the HIMA safety rack and external HMIs, SCADA platforms, distributed field I/O modules and third-party process controllers through two isolated RS485 interfaces. It resolves key bottlenecks of legacy safety control architectures, including main CPU resource occupation by large-volume bus data, unisolated communication lines causing ESD damage and electromagnetic interference, inconsistent baud rate matching across multi-device networks, and lack of independent fault logging for communication link failures. The built-in dual-port RAM enables high-speed data sharing with the central processing unit, while galvanic isolation blocks ground loop currents and voltage spikes transmitted from field transmitters, valve positioners and remote junction boxes.