Ethernet: 2 × RJ45 (10/100 Mbps), supports MMS, Modbus TCP and redundancy

Serial Ports:

COM3: RS-232C (with modem signals, for commissioning and service)

COM4: Isolated RS-232/485 (configurable as Modbus RTU master/slave)

Expansion Buses: CEX-Bus (I/O expansion), RCU-Link (redundancy synchronization)

Others: LED status indicators, INIT button, CompactFlash slot, 3.6V backup battery

Dual CPU hot standby redundancy, switchover time ≤ 10 ms

Redundancy coverage: CPU, CEX-Bus, communication interfaces and full S800 I/O system

Boolean instruction execution speed: 0.03 μs

Minimum program cycle time: 1 ms

Clock synchronization: 1 ms accuracy among multiple controllers (CNCP protocol)

Supports Modbus TCP/RTU, PROFIBUS DP, IEC 61850 and MMS

Connectable to over 200 S800 I/O stations, ideal for large-scale systems

Hardware-level fault detection, redundant link diagnosis, event queue (3000 events per OPC client)

Supports online modification, hot-swappable I/O and remote maintenance

Power & Energy: Substation automation, wind/PV converters, energy storage PCS and high-voltage variable frequency drives (used together with PCD235B101 and CI861K01)

Process Industry: Main controller for DCS in oil & gas, chemical and water treatment industries, applied in high-reliability redundant systems

Smart Manufacturing: High-speed logic and motion control for metallurgy, papermaking and automotive production lines

Critical Infrastructure: SIL3 safety control for data centers, rail transit and large buildings

2 × PM858 CPU modules

2 × TP830 baseplates

2 × TB807 bus terminators

1 × TK850 CEX-Bus extension cable

1 × TK851 RCU-Link redundancy synchronization cable

2 × 3.6V backup batteries