HIMA F8621X

Description

Product Overview

HIMA F8621X is the industrial extended temperature variant of base F8621A coprocessor hardware, retaining identical core communication and coprocessor architecture while upgraded for extreme wide-temperature industrial environments including unheated outdoor cabinet installations, offshore platform sheltered control enclosures, and winter low-temperature process plants. It maintains full SIL3 safety certification and complete hardware backward compatibility with all H41q and H51q HIQuad rack systems, supporting identical dual RS-485 serial communication and inter-CPU dual-port RAM data exchange functions as F8621A.

Technical Specifications

• Dimension: 4 TE Eurocard width; physical size 100 mm × 80 mm × 32 mm
• Net Weight: 0.17 kg
• Operating Power Supply: 5 V DC, nominal operating current 375 mA
• Main Processor Chipset: HD64180 industrial extended temperature microcontroller, clock speed 10 MHz
• Onboard Static Memory: 384 KB combined wide-temperature CMOS RAM + EPROM
• RAM Backup Compatibility: Fully compatible with F7131 memory backup monitoring module
• Serial Communication Interfaces: 2 × reinforced isolated half-duplex RS-485 ports
• Software Configurable Baud Rate Range: 300 bps to 57600 bps
• Inter-CPU Bus Interface: Dual-port RAM high-speed Bus 1 link to primary HIQuad CPU
• Serial Port Isolation Rating: 2500 V AC reinforced galvanic insulation
• Operating Temperature Range: -25 °C to +70 °C (extended wide range vs F8621A 0~60°C)
• Storage Temperature Range: -40 °C to +85 °C
• Safety Certification: IEC 61508 SIL 3, IEC 61511, ATEX Zone 2 certified
• EMC Compliance: EN 61000-6-2 heavy industrial EMC standard

Function Features

1. Identical independent serial coprocessor workload offloading function as F8621A base model
2. Dual reinforced-isolation RS-485 serial channels for simultaneous DCS and HMI external connections
3. Full software parameter compatibility with F8621A, no ELOP II programming modification required during model substitution
4. Extended temperature rated internal components eliminate cold-start communication failure risk below 0 °C
5. Enhanced line fault diagnostic algorithm optimized for temperature-induced serial signal attenuation
6. Front panel identical multi-color LED status indicators (Power, Run, Tx/Rx, Fault) matching F8621A layout
7. ATEX Zone 2 hazardous area certification for installation inside sheltered classified industrial cabinets

Performance Parameters

• Serial channel maximum throughput: 57600 bps per channel simultaneous operation
• Inter-CPU dual-port RAM access latency: ≤ 0.8 μs consistent across full -25 ~ +70 °C temperature window
• Communication fault diagnostic coverage rate: 99.3%
• MTTFd full wide-temperature operating range: > 1,680,000 hours
• Safety logic cycle delay introduced by coprocessor: < 1 ms maximum
• Continuous 24/7 operation duty cycle 100% rated

Material Composition

• Main PCB: UL94-V0 FR4 wide-temperature flame retardant printed circuit board
• Front Panel: Low-temperature resistant PA66 flame retardant plastic with frost-resistant LED light guides
• D-Sub Serial Connectors: Nickel-plated copper alloy low-temperature fatigue resistant contacts
• Internal Memory & Processor ICs: Industrial extended temperature grade semiconductors rated -40 °C to +125 °C
• Isolation Optocouplers: Reinforced insulation wide-temperature optoelectronic isolation arrays
• Mounting Hardware: Stainless steel anti-corrosion DIN rail locking clips for offshore salt fog environments

Structural Characteristics

• 4 TE vertical plug-in Eurocard form factor mechanically interchangeable with F8621A in all HIQuad racks
• Rear DIN 41612 96-pin backplane connector fully pin-compatible with base F8621A model
• Front panel D-Sub port layout and LED window geometry identical to F8621A for seamless field replacement
• Double-layer internal EMI shielding optimized for low-temperature cabinet thermal contraction interference
• Corrosion-resistant plated metal internal chassis for salt fog offshore environment durability
• IP20 dust ingress protection for internal circuit components

Working Principle

Core data processing and communication workflow identical to F8621A; primary safety CPU transfers external communication data to F8621X via dual-port RAM, the onboard extended-temperature coprocessor handles serial encoding, transmission, and received data formatting independent of core safety logic cycles. Upgraded wide-temperature internal semiconductors maintain stable signal generation and isolation performance at sub-zero cabinet ambient temperatures, while enhanced diagnostic circuits compensate serial signal attenuation caused by extreme temperature fluctuation across field wiring runs. Reinforced galvanic isolation layers block hazardous area ground loop faults from penetrating the safety controller backplane in ATEX Zone 2 installations.

Advantage Highlights

1. Extended -25 °C low-temperature operating rating enables deployment in unheated winter industrial control cabinets
2. ATEX Zone 2 certification permits installation inside sheltered classified hazardous area enclosures
3. Full mechanical, pin, and programming backward compatibility with standard F8621A for direct drop-in field replacement
4. Stainless steel mounting hardware resists salt fog corrosion for offshore oil & gas platform applications
5. Reinforced 2500 V AC serial port isolation reduces ground loop interference risk on long-distance field serial cables
6. Wide-temperature memory ICs eliminate cold-start communication configuration loss events

Applicable Industries

Offshore oil & gas platforms, northern region natural gas pipeline stations, winter unheated refinery auxiliary control rooms, chemical plant ATEX Zone 2 sheltered cabinets, remote wind turbine safety monitoring stations, cold climate mining process safety interlock systems

Installation Requirements

1. Mount exclusively on HIMA H41q / H51q standard 19-inch Eurocard rack backplane slots
2. Pair with F7131 monitoring module to activate RAM backup power retention
3. Rack 24 V DC power supply protected with 6 A slow-blow T-type safety fuse
4. RS-485 field wiring uses shielded twisted pair cable fitted with 120 Ω line termination resistor at cable remote end
5. Cabinet ambient humidity limited 5% – 90% non-condensing; avoid direct frost contact on module surface
6. ATEX Zone 2 installation requires full cabinet purging or certified hazardous area enclosure rating

Usage Precautions

1. Hot-swapping strictly prohibited; cut full rack primary power supply before inserting or removing module
2. Maximum field serial circuit voltage limited to 24 V DC; no direct AC mains connection to D-Sub ports
3. All communication configuration programming completed via HIMA ELOP II factory software only
4. Bi-monthly front panel LED inspection mandatory for offshore salt fog exposed installations
5. Spare modules stored inside ESD anti-static bags at controlled 18–22 °C constant temperature
6. Condensation formation on module surface during temperature cycling will cause permanent circuit damage