PM861AK01 3BSE018157R1｜Processor Unit AC 800M｜

1. Processor and Performance
CPU: 32-bit RISC (MPC860), 60 MHz (25% faster than PM860)
Boolean instruction: ≤ 0.12 μ s (20% faster than PM860) ABB
Number of tasks: up to 16, minimum cycle of 1 ms
SOE resolution:<1 ms
2. Memory (800xA 5.1 FP4+)
Flash: 16 MB (program/firmware)
RAM: 32 MB (approximately 10.3 MB available for applications)
Backup: Built in 3.6V lithium battery, power-off data protection/RTC
3. Communication interface (same as PM860)
Ethernet: 2 x RJ45 (CN1/CN2), redundant Modbus TCP、OPC
Serial port: 2 × RS-232C (COM3/COM4), COM4 isolation is used for configuration
Modular Bus: Electric+Optical, Connected to S800 I/O Cluster
CEX bus: up to 12 communication modules (Profibus DP, FF, etc.)
4. I/O capability
Maximum I/O points: 4096 points (local+remote)
Maximum I/O modules: 96 S800 I/Os
Modulabus cluster: 1 electric+7 optical
5. Redundancy and reliability
CPU redundancy: Supports 1:1 hot standby, switching<10 ms
Power redundancy: Supports system power redundancy (such as SD833)
Status indication: RUN, STOP, ERR, BUS LED
Working temperature: -25 ° C~+70 ° C
Power supply: 24V DC (19.2-30V DC), backplane power supply
Power consumption: typical 8 W

PM861AK01 3BSE018157R1｜Processor Unit AC 800M｜