HIMA F8621A Central Processor Unit Module for H41Q/H51Q Systems

Product Overview and Core Function
The HIMA F8621A serves as a coprocessor module for H41Q and H51Q safety systems. As a result, it provides additional processing power for complex safety logic. Specifically, this central processor unit supports the main CPU with dedicated communication functions. Consequently, the HIMA F8621A enhances overall system performance for critical applications.

Key Technical Parameters and Processor Architecture
The HIMA F8621A features its own microprocessor of type HD 64180. For instance, the clock frequency operates at 10 MHz for reliable processing. This coprocessor module handles communication tasks independently from the main CPU. Therefore, it offloads the primary processor for improved efficiency.

Memory Configuration and Battery Backup
The module contains 384 kbyte static memory in total. Specifically, this includes CMOS-RAM and EPROM on two integrated circuits. The RAMs receive battery buffer from the power supply monitoring module F 7131. Consequently, the HIMA F8621A retains critical data during power interruptions. This battery backup ensures program and data integrity in safety systems.

RS 485 Communication Interfaces
The HIMA F8621A provides two RS 485 interfaces operating in half-duplex mode. For instance, both interfaces feature galvanic isolation for noise immunity. Each interface has its own communication processor for dedicated handling. Therefore, these ports resist ground loops and electrical interference effectively.

Transmission Rate Options
The software configures transmission rates for the RS 485 interfaces. Specifically, supported rates include 300, 600, 1200, 2400, 4800, 9600, 19200, 38400, and 57600 bps. Alternatively, the module can take over values set on the CU via DIP switch. Consequently, the HIMA F8621A adapts to various network requirements.

Dual-Port RAM for Fast Access
The module includes dual-port RAM for fast memory access. Specifically, this design enables communication with the second central module. As a result, both CPUs share data without delay. This architecture supports redundant and high-availability system configurations. Therefore, the HIMA F8621A is ideal for safety-critical applications.

Mechanical Construction and Space Requirements
The HIMA F8621A requires a space of 4 TE (telephone units or 4 TE wide) in a standard rack. Consequently, this compact size saves valuable cabinet space. The module fits directly into H41Q and H51Q system racks. In addition, the robust construction ensures reliable operation in industrial environments.

Power Requirements and Operating Data
The HIMA F8621A operates on 5 V DC at 360 mA from the backplane. Therefore, the total power consumption is approximately 1.8 watts. No external power supply connection is needed on the module itself. Consequently, ensure your rack power supply can handle this additional load.

System Compatibility and Integration
This central processor unit is designed specifically for H41Q and H51Q systems. For instance, it works alongside the main CPU module for expanded functionality. The coprocessor handles communication protocols and data exchange. Similarly, the dual-port RAM enables seamless coordination with redundant central modules. Therefore, the HIMA F8621A integrates smoothly into existing HIMA safety architectures.

Installation Guide
Mount the HIMA F8621A in any available slot of an H41Q or H51Q rack. First, ensure the rack power supply meets the 5 V DC / 360 mA requirement. Verify that the F 7131 power supply monitoring module provides battery backup. Next, connect the RS 485 communication lines to your field devices. Set the desired transmission rate via software or DIP switch configuration. Finally, power up the system and verify communication status.

Complete Package Contents
HIMA F8621A Central Processor Unit Module (1 unit)

HD 64180 microprocessor (pre-installed, 10 MHz)

384 kbyte static memory (CMOS-RAM and EPROM on 2 ICs)

Two RS 485 half-duplex interfaces with galvanic isolation

Two dedicated communication processors

Dual-port RAM for fast memory access

Module housing with 4 TE width

Frequently Asked Questions (FAQ)
1. What systems is the HIMA F8621A compatible with?
The HIMA F8621A is designed for H41Q and H51Q systems. Specifically, it serves as a coprocessor module to the main CPU.

2. What microprocessor does the F8621A use?
The module uses an HD 64180 microprocessor running at 10 MHz. Therefore, it handles communication tasks independently.

3. What communication interfaces does this CPU module provide?
The HIMA F8621A provides two RS 485 interfaces with galvanic isolation. These operate in half-duplex mode with software-selectable baud rates.

4. How is memory backed up on the F8621A?
The CMOS-RAM receives battery buffer from the F 7131 power supply monitoring module. Consequently, data persists during power loss.

5. What is the space requirement for this central processor unit?
The module requires 4 TE (4 units) of rack space. Its power consumption is 5 V DC at 360 mA.