1TNE968900R1200 is PM564-R CPU from ABB AC500-eCo PLC series with fixed relay output terminals and integrated onboard analog and digital I/O. It is designed for small and medium machinery automation and used for cabinet assembly and spare part replacement of outdated control systems.

1TNE is unified part number prefix for ABB AC500 PLC products. 968900 refers to base hardware platform of PM564 CPU. Suffix R1200 stands for factory fixed relay terminal configuration, and PM564-R is its official commercial model name.

The controller is powered by DC24V. It is equipped with 128kB program memory and 128kB data memory. Onboard I/O includes 6 digital inputs, 6 relay digital outputs with maximum 2A per channel, 2 analog inputs and 1 analog output. It adopts standard DIN rail mounting. Operating ambient temperature ranges from 0℃ to +55℃, storage temperature ranges from -25℃ to +70℃, with IP20 protection for indoor cabinet installation.

One built-in 10/100Mbps Ethernet port and one RS485 serial port are available, supporting Modbus RTU, CS31 and ASCII protocols. Two expansion slots are reserved for optional communication modules, and the unit can expand peripheral I/O with S500 and S500-eCo series remote I/O modules.

It executes user programs complied under Control Builder software following IEC61131-3 standard with LD, ST, FBD and SFC programming languages. The CPU collects analog and discrete field signals to implement equipment interlock, sequence control and PID closed-loop regulation. Runtime data and fault messages can be uploaded to upper HMI or DCS via Ethernet or serial bus. It supports SD card program backup and offline firmware upgrade, and the maximum expandable total I/O reaches 512 points.

This CPU is widely used for small wastewater treatment equipment, pump cluster local control, packaging machines, HVAC automatic control and small food processing production lines, cooperating with ABB low voltage components to build compact control cabinet solutions.

Disconnect DC24V power before module dismounting or wiring modification. Complete quarterly maintenance by cleaning dust with dry compressed air and checking terminal screw tightness. Back up control program to SD card regularly. Inspect communication cables and field sensor loops prior to module replacement once abnormal communication or analog sampling failure occurs.