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        • Lifecycle status

          Active / Available from OEM
          Apter Power can support F8621A quotation requests and provide official HIMA documentation for legacy H41q and H51q communication projects.

        F8621A

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        HIMA F8621A is a HIQuad communication coprocessor with two isolated RS485 interfaces for serial data exchange.
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        Warranty Policy
        We provide 1 year warranty for all remaining parts.
        The warranty period is one year from the date of shipment, unless otherwise stated in the parts description. We guarantee that the project will not exhibit functional defects that may occur under normal operating conditions during the warranty period.
        Return Notice
        The warranty period is one year from the date of shipment, unless otherwise stated in the parts description. We guarantee that the project will not exhibit functional defects that may occur under normal operating conditions during the warranty period.
        In the event of a defect, we will send new equipment, repair equipment or refund the purchase price based on our availability. You must contact us to obtain a return authorization and return the defective device to us within 14 days of reporting the defect.
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        Technical specifications for F8621A

        • Manufacturer:
          HIMA
        • Part Number:
          F8621A
        • Product Family:
          HIMA HIQuad® X
        • Product Type:
          HIQuad Communication Coprocessor
        • Stock:
          1
        • Function:
          Communication coprocessor
        • Interfaces:
          2 x isolated RS485
        • Mode:
          Half duplex
        • Baud Rate:
          300 to 57,600
        • Processor:
          HD64180 at 10 MHz
        • Memory:
          384 kB static SRAM/EPROM
        • System:
          H41q / H51q
        • Supply:
          5 VDC; 360 mA
        • Tariff Code:
          8538900000
        • Country of origin:
          Germany
        • Place of shipment:
          Xiamen,Fujian,China
        By purchasing this item, you agree to the Terms & Conditions, ApterPower is not an authorized distributor for listed manufacturers or tradenames and therefore the manufacturer's warranty does not apply. All our products come with ApterPower's 1-year warranty.

        More Information

        Overview Manuals Serial Interfaces Data Handling Rack Integration Applications

        Features:

        • Two isolated RS485 channels
        • 300 to 57,600 baud operation
        • Dedicated processor and dual-port memory
        F8621A handles serial communication tasks independently of the main H41q or H51q safety processor.

        Galvanic isolation and dedicated processing support two half-duplex links while dual-port memory transfers the resulting data to the central system.

        Protocol, baud rate, addressing, termination, rack position, and coexistence with other coprocessors must be preserved from the working configuration.

        Official HIMA documentation and quotation assistance for the HIMA F8621A HIQuad Communication Coprocessor are available through Apter Power.
        HIMA F8621A HIQuad Communication Coprocessor Manuals, Datasheets, Links Important Notice: Other accessories, manuals, cables, calibration data, software, etc. are not included with this equipment unless listed in the above stock item description. All prices are shown in USD.

        Two isolated RS485 communication channels

        • Port count: F8621A provides two half-duplex RS485 interfaces for serial data exchange.
        • Isolation: Galvanic separation limits direct electrical coupling between the communication channels and the safety-system electronics.
        • Dedicated processor: An onboard communication processor handles serial activity independently from the central H41q or H51q processor.
        • Selectable rates: Software can select 300 through 57,600 bit/s from the documented transmission-rate set.
        • Interface switches: S1 through S4 must retain the permitted RS485 settings for interface 1 and interface 2.

        Memory and coprocessor operation

        • Microprocessor: The module uses an HD 64180 processor operating at 10 MHz for its communication tasks.
        • Program storage: CMOS RAM and EPROM resources provide 384 kB of static memory for operating software and buffered data.
        • Battery support: RAM retention is supplied through the F7131 monitoring module in H51q or the rear-board buffer batteries in H41q.
        • Dual-port memory: A dual-port RAM path allows fast alternating data access between F8621A and the central module.
        • Host offload: Serial protocol processing is separated from the main safety CPU so communication handling does not consume the same execution path.

        Using F8621A in H41q and H51q

        • Supported systems: The coprocessor is documented for H41q and H51q systems beginning with the specified operating-system release.
        • H51q slots: In an H51q central rack, F8621A is restricted to communication positions CM1 through CM3.
        • Module width: The hardware occupies four slot units within the approved central subrack arrangement.
        • Rack supply: Operating power is drawn from the 5 VDC rack supply at the documented current demand.
        • Parallel modules: Combination with F8627 or F8628 requires the applicable communication function block and supported software version.

        Serial projects using F8621A

        • Process-control links: Redundant RS485 paths can connect H41q or H51q stations to compatible process-control equipment through the prescribed interface hardware.
        • Modbus exchange: Serial Modbus slave communication is supported, with HIMA recommending 9.6 or 57.6 kbit/s instead of 19.2 kbit/s for this module.
        • HIPRO-S networks: HIPRO-S/N communication uses the coprocessor where the approved safety-network architecture calls for the serial path.
        • Engineering bus: An ELOP II bus can be connected with the documented BV 7046 cable arrangement.
        • Gateway integration: Operator stations or protocol gateways can exchange approved non-safety data when addressing, termination, and message timing are configured correctly.
        Description
        Serving HIMA H41q and H51q safety systems, F8621A is a HIQuad communication coprocessor that offloads serial data handling from the central processor through dual-port memory.

        Two galvanically isolated RS485 half-duplex interfaces give F8621A dedicated communication processing at supported transmission rates from 300 to 57,600 baud. Static memory retains the communication program and buffered data.

        Use in an H51q rack follows the assigned communication locations and supported module combination. Protocol selection, cabling, termination, baud rate, addressing, and the restriction on parallel F8627X safety communication all affect deployment of F8621A.
        Alternative Names
        HIMA F8621A HIQuad F8621A F 8621 A F-8621A F8621-A F862IA F862lA HIMA F-8621A
        Technical notes
        F8621A offloads serial communication through two isolated RS485 channels, dedicated processing, dual-port memory, and configurable baud rates.
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        FAQS

        The following is a list of questions commonly asked by our customers. Please contact us if you have a question about our process that is not answered below.
        VIEW ALL FAQS
        How should the two RS485 channels on F8621A be assigned?
        F8621A provides two galvanically isolated RS485 half-duplex interfaces, each supported by dedicated communication processing.
        Which baud rates can F8621A use?
        F8621A supports documented serial transmission rates from 300 to 57,600 baud; both ends must use matching protocol and timing settings.
        How does F8621A exchange data with the safety CPU?
        F8621A uses dual-port memory to pass communication data between its serial functions and the H41q or H51q central system.
        Which serial-project records must match before replacing F8621A?
        Record the protocol, addresses, baud rate, cable termination, rack position, memory configuration, and application dependencies before replacing F8621A.
        Can F8621A run alongside F8627X safety communication?
        The system documentation restricts combining safety communication through F8621A with a parallel F8627X arrangement; verify the complete architecture.
        Where is F8621A installed in an H51q rack?
        Install F8621A only in the documented communication module positions and confirm the rack supply and compatible central-module arrangement.
        Which serial-integration projects suit F8621A?
        F8621A is used for serial links to approved operator, supervisory, or plant interfaces in legacy H41q and H51q safety-control projects.

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