HIMA F8621A Coprocessor Module (H41q/H51q)
Overview
The HIMA F8621A coprocessor module is the communication coprocessor of the PES H41q/H51q fail-safe control systems. The F 8621A is Per the official HIMA module datasheet, it is used in the H41q/H51q from BS41q/51q V6.0-6 (9808) with ELOP II. Although the module is frequently described in the trade as a CPU module, the official HIMA designation is coprocessor module: it carries its own microprocessor and handles the safety-related serial communication of the fail-safe system.
The coprocessor module is built around the HD 64180 microprocessor running at a clock frequency of 10 MHz. It provides 384 kbyte of static memory implemented as CMOS-RAM and EPROM on two ICs, with battery buffering of the RAMs: on the H51q the buffering is provided by the power supply monitoring module F 7131, while on the H41q the buffer batteries are located on the rear PCB of the subrack.
Engineering & Design
The F 8621A provides two RS 485 interfaces in half-duplex mode with galvanic isolation and a dedicated communication processor. Transmission rates are set by software in the range 300, 600, 1200, 2400, 4800, 9600, 19200 and 57600 bps, or the values set on the CU via DIP switches are taken over. A Dual Port RAM provides fast alternating memory access between the coprocessor and the central module.
The module requires a space of 4 SU and operates from 5 V DC with a current consumption of 360 mA. In the central subracks of H51q systems the coprocessor module may only be used in the slots CM1 to CM3. Mixed operation of safety-related communication via the F 8621A and parallel Ethernet communication via the F 8627X is not admissible, as stated in the official datasheet.
Key Features
- HIMA F8621A coprocessor module for PES H41q/H51q (with ELOP II, from BS41q/51q V6.0-6)
- Own microprocessor HD 64180, clock frequency 10 MHz
- 384 kbyte static memory: CMOS-RAM and EPROM on two ICs
- Battery buffering of the RAMs (H51q via F 7131; H41q via rear PCB batteries)
- 2 × RS 485 half-duplex interfaces with galvanic isolation
- Transmission rates 300 to 57600 bps, software or DIP switch selectable
- Dual Port RAM for fast access to the central module
- Space 4 SU; operating data 5 V DC / 360 mA
Applications
- Safety-related serial communication with the HIMA F8621A in H41q/H51q systems
- Redundant connection to a process control system (via BV 7040)
- Connection to an ELOP II bus (via cable BV 7046)
- Spare HIMA F8621A module for fail-safe system maintenance
Specifications
| Module | F 8621A |
| Type | Coprocessor module for PES H41q/H51q |
| Microprocessor | HD 64180, 10 MHz |
| Memory | 384 kbyte static (CMOS-RAM and EPROM) |
| Interfaces | 2 × RS 485 half-duplex, galvanically isolated |
| Transmission rates | 300 to 57600 bps |
| RAM buffering | Battery buffered (F 7131 on H51q; rear PCB batteries on H41q) |
| Operating data | 5 V DC / 360 mA |
| Space requirement | 4 SU |
Compatibility & Integration
The HIMA F8621A is fitted in the coprocessor slots of the H41q/H51q central subrack (CM1 to CM3 in H51q systems). The redundant connection to a process control system is made via two redundant modules, each with a BV 7040, and the connection to an ELOP II bus is made via cable BV 7046.
When a Profibus-DP communication module F 8628/F 8628X or an Ethernet communication module F 8627/F 8627X is used in addition to the coprocessor module, the software function block HK-COM-3 (from ELOP II V 3.5, BS 41q/51q V 7.08) has to be set up with proper parameterisation, as noted in the official datasheet.
Ordering Information
To order the HIMA F8621A coprocessor module from Seven Star LLC, quote the module number and the quantity required. We confirm availability and delivery to your site in Oman or anywhere in the GCC, and we check the module revision against your H41q/H51q system before dispatch.
Why Seven Star LLC
Seven Star LLC supplies HIMA fail-safe system spares to industrial customers across Oman and the wider GCC region. Every HIMA F8621A coprocessor module we supply is verified against your H41q/H51q system before dispatch, and our team confirms the module revision matches your installation before you order.
FAQ
What is the HIMA F 8621A?
The F 8621A is the coprocessor module of the HIMA PES H41q/H51q fail-safe control systems, handling safety-related serial communication with its own microprocessor.
Is the F 8621A a CPU module?
The official HIMA designation is coprocessor module, although it is often described as a CPU module in the trade. It works alongside the central module of the system.
What interfaces does the F 8621A provide?
It provides two galvanically isolated RS 485 half-duplex interfaces with transmission rates from 300 to 57600 bps.
What is the memory of the F 8621A?
The module provides 384 kbyte of static memory, implemented as CMOS-RAM and EPROM on two ICs, with battery buffering of the RAMs.
Which systems use the F 8621A?
The F 8621A is used in PES H41q/H51q systems from BS41q/51q V6.0-6 (9808) with ELOP II, in the coprocessor slots of the central subrack.
HIMA is a global leader in functional safety and automation technology, specializing in solutions that protect people, the environment, and critical industrial assets. Founded in Germany in 1908, HIMA has become a trusted name in safety instrumented systems (SIS) and industrial control technology for process and railway automation.
Its product portfolio includes safety PLCs, logic solvers, controllers, and software designed to meet international safety standards such as IEC 61508 and IEC 61511. HIMA systems are widely used in oil & gas, petrochemical, power, and transportation sectors, ensuring maximum operational integrity and minimal downtime.
Seven Star LLC supplies genuine HIMA safety and automation products to clients across the Middle East, delivering certified solutions that combine advanced engineering, long-term reliability, and expert local support.
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