ABB 3BDH000021R1

This product is AC500 series DeviceNet slave communication expansion module for ABB AC500 PLC system, manufactured in compliance with IEC industrial standards and ABB global production specifications. It is a plug-in optional accessory mounted on the dedicated expansion slot of AC500 CPU, which expands standard DeviceNet bus interface for the controller to realize data interaction with DeviceNet master stations, inverters and distributed field peripheral equipment.

3BDH is fixed internal material coding prefix for ABB AC500 series PLC expansion accessory products.000021 stands for exclusive part serial number of this DeviceNet communication module inside ABB internal product catalog.R1 refers to the first hardware revised version with optimized internal circuit layout compared with original prototype design.

The module acquires working power from CPU internal backplane bus without independent external power supply. DeviceNet interface follows official DeviceNet standard specification, supporting adjustable baud rates of 125kbps, 250kbps and 500kbps with matched effective transmission distance. Working ambient temperature ranges from -25℃ to +60℃, storage temperature covers -40℃ to +85℃, protection grade is IP20 for inner cabinet installation. The complete module passes IEC61000 EMC anti-interference and industrial anti-vibration certification.

Front panel is equipped with four-pin screw terminal for DeviceNet bus cable wiring including CAN-H, CAN-L, power and shield ground. Rear gold finger plug structure is inserted into CPU reserved option slot to finish internal data transmission via CPU built-in bus circuit. The module runs as DeviceNet slave station, no built-in independent Ethernet or RS485 communication port on module housing.

It expands dedicated DeviceNet bus channel for AC500 main controller, accomplishing cyclic real-time data exchange between local PLC system and upper DeviceNet master controller as well as field intelligent drives and remote distributed I/O modules. It uploads field digital and analog acquisition data from local I/O modules to master station and receives downlink control commands to drive on-site executing components, enabling the PLC to access standard DeviceNet industrial bus network.

It is widely configured inside automation control cabinets of automobile assembly lines, packaging machinery, material conveying equipment and general factory automation projects, applied for bus connection with various DeviceNet compliant servo drives and field intelligent devices.

Cut off total power supply of matched CPU before installation, insert the module vertically into CPU expansion slot until mechanical locking is fully completed. Complete DeviceNet bus wiring strictly following terminal definition and install terminal matching resistor at bus endpoints according to specification requirements. Perform routine maintenance every six months, remove dust on terminals and module shell with dry soft brush and forbid liquid cleaning solvent. Replace the entire module when persistent bus communication fault exists after eliminating external wiring and peripheral equipment faults, unauthorized disassembly and internal circuit modification are prohibited.