This item is AC500-eCo series standard CPU controller of ABB AC500 PLC platform, manufactured in compliance with IEC industrial standards and ABB global production specifications. It is DIN rail mounted core control unit of compact automation system, responsible for executing user control program, processing local digital and analog I/O data and finishing data communication with peripheral HMI and field intelligent devices to realize automatic logic and process control.

3BDH is fixed internal material coding prefix for ABB AC500 series CPU products.001000 is unique internal part serial number of this eCo CPU in ABB product catalog.R0001 represents fixed hardware version code of this specified controller variant.

Rated input power supply is DC24V with allowable voltage fluctuation from 20.4VDC to 28.8VDC. Working ambient temperature ranges from -25℃ to +60℃, storage temperature covers -40℃ to +85℃, protection grade is IP20 for cabinet indoor installation. The whole controller passes IEC61000 EMC anti-interference and industrial anti-vibration certification, compatible with full range S500 series expansion I/O modules.

Onboard one standard RS485 serial port supporting Modbus RTU protocol for connecting field transmitters, inverters and touch screen. Rear internal backplane bus interface connects with S500 terminal bases to realize high-speed cyclic data exchange with all expanded I/O modules. No built-in native Ethernet port on this standard CPU version.

As central processing core of compact PLC system, it downloads and runs compiled user programs to complete arithmetic calculation, logic interlock judgment and closed-loop PID regulation. It cyclically reads field signal status from connected I/O modules and sends corresponding output instructions to field execution components. Meanwhile it diagnoses module and circuit fault status and exchanges data with external intelligent equipment via onboard serial communication port.

It is widely installed inside control cabinets of small water treatment facilities, packaging machinery, fan and pump group control, HVAC equipment, textile small-scale automation and building auxiliary monitoring projects for decentralized automatic control.

Check DC24V power polarity before power-on to avoid hardware damage caused by reverse connection, fix the controller onto standard DIN rail and assemble matched S500 terminal bases sequentially. Complete RS485 wiring following A/B signal definition and set communication parameters via programming software. Perform routine maintenance every six months, wipe dust on casing and port terminals with dry soft brush and forbid liquid cleaning agents. Replace the complete CPU unit if permanent mainboard fault occurs after excluding power and wiring failures, unauthorized disassembly and internal circuit modification are prohibited.