HIMA F8652 (F 8652) Safety Related Central Module

Model: F 8652
Application: Used in PES H41q-MS, HS, HRS systems
Safety Class: AK 1 – 6 (Safety-related applications)
Construction:
- Two Intel 386EX microprocessors (32-bit)
- Two PCBs in European standard format
- One additional PCB for diagnostic display circuits
Operating Voltage: 5V DC, 2000 mA

Specification	Details
Microprocessors	2 × INTEL 386EX, 32-bit
Clock Frequency	25 MHz
Operating System Memory	1 MB Flash-EPROM
User Program Memory	512 KB Flash-EPROM
Data Storage	256 KB SRAM
Interfaces	2 × RS 485 serial interfaces
Fail-Safe Watchdog	24V DC output, 500mA load, short-circuit proof
Space Requirement	8 TE

4-digit alphanumeric display for system status and errors
2 LEDs:
- CPU (Central module errors)
- I/O (Testable I/O module errors)
3 push buttons:
- “<>” and “↵” for navigating diagnostic information
- ACK button to reset error indications or restart the system

Buffer Battery Lifespan:
- 2500 days (6.8 years) at 25°C
- 100 days at 60°C
Recommended Replacement: Every 4 years
Battery Type: CR 2477N (HIMA Part No. 44 0000018)
Startup Configuration:
- Check bus station number and transmission rate at Switch S1