Description

HIMA F8621A (984862160) SIL 3 Safety Communication Processor Module

Technical Specifications

• Product Model: F8621A 984862160
• Brand: HIMA
• Warranty: One Year
• Input Voltage: 24 VDC (18–32 VDC wide redundant power input)
• Operating Temperature: -20°C to +70°C
• Storage Temperature: -40°C to +85°C
• Response Time: ≤ 5ms backplane high-speed data exchange cycle
• Protection Class: IP20 rack-mounted Eurocard housing
• Accuracy Class: N/A (Safety communication processing unit)
• Output Frequency: N/A (digital communication module)
• Rated Current Range: 360mA @5VDC, 750mA @24VDC total power consumption
• Communication Interface: 2 x galvanically isolated RS485 half-duplex ports, internal HIQuad backplane dual-port RAM bus
• Supported Protocols: HIMA SafeBus, Modbus RTU, custom safety system proprietary protocol
• Overload Capacity: Built-in reverse polarity, overvoltage, ESD and short-circuit electronic protection
• Dimensions: 160 mm × 100 mm × 25 mm (4TE standard Eurocard width)
• 

Product Overview

The F8621A 984862160 is a certified SIL 3 rated dedicated communication co-processor module for HIMA HIQuad and HIMatrix safety instrumented systems (SIS). Equipped with an independent HD64180 10MHz communication processor and 384KB non-volatile static memory, it acts as an isolated data gateway between the main safety CPU, field remote I/O racks, upper SCADA/DCS monitoring platforms and fire & gas protection subsystems. This module resolves core bottlenecks in safety loop architecture, including communication bus overload on the main controller, electromagnetic interference causing corrupted safety data, limited multi-drop device expansion capacity, and data loss during momentary power dips. Galvanic isolation on each RS485 port blocks ground loop noise and transient surges from high-power industrial equipment, while battery-backed RAM preserves critical configuration parameters and fault event logs through power outages. Process safety engineers, SIS system integrators, petrochemical and power plant maintenance technicians benefit greatly from its fault-tolerant bus structure and continuous background diagnostic routines. It complies with IEC 61508 functional safety standards, supports hot-swapping in the standard HIMA rack chassis to eliminate full-system shutdown during replacement, and standardizes long-distance safety signal transmission for emergency shutdown (ESD), burner management (BMS) and boiler protection critical loops.