This unit is AC500 series PROFIBUS-DP master communication expansion module of ABB AC500 PLC platform, produced conforming to IEC industrial standards and ABB global production specifications. It is a pluggable optional accessory installed into the dedicated expansion slot of AC500 CPU, providing PROFIBUS-DP master function for PLC to build bus network and conduct periodic data communication with multiple PROFIBUS-DP slave devices on field side.

3BDH is fixed internal material coding prefix for ABB AC500 series PLC expansion accessory products.000022 represents exclusive part serial number of this PROFIBUS-DP master module inside ABB internal product catalog.R1 stands for the first optimized revised hardware version with upgraded internal circuit compared with original prototype design.

The module gets operating power from CPU internal backplane bus without extra independent external power supply. PROFIBUS-DP interface complies with international PROFIBUS standard, supporting adjustable baud rate ranging from 9.6kbps up to 12Mbps with corresponding rated transmission distance. Working ambient temperature ranges from -25℃ to +60℃, storage temperature ranges from -40℃ to +85℃, protection grade is IP20 for inner cabinet installation. The whole module passes IEC61000 EMC anti-interference and industrial anti-vibration certification.

Front panel is equipped with screw type wiring terminals for PROFIBUS A line, B line and shielding ground to connect field PROFIBUS bus cable. Rear gold finger plug structure inserts into CPU reserved expansion slot to realize internal high-speed data interaction via CPU built-in bus. The module works as PROFIBUS-DP master station, no integrated independent Ethernet or RS485 port on module body.

It expands dedicated PROFIBUS-DP master bus channel for AC500 main controller. The module periodically sends control commands to all connected PROFIBUS slave stations including remote distributed I/O modules and variable frequency drives, meanwhile receives real-time field acquisition data uploaded from slave devices. It manages bus node address allocation and bus fault diagnosis of whole PROFIBUS network, realizing centralized control for field bus automation system.

It is widely matched with AC500 PLC inside control cabinets of automotive production lines, cement equipment, metallurgy auxiliary control, packaging automation and large-scale water treatment projects, used for constructing PROFIBUS field bus system and accessing various standard PROFIBUS slave field devices.

Cut off the whole power supply of matched CPU before installation, insert the module vertically into CPU expansion slot until mechanical locking is fully completed. Complete PROFIBUS bus wiring strictly following A and B polarity definition and configure terminal matching resistor at two endpoints of the bus trunk as required. Carry out routine maintenance every six months, wipe dust on terminals and module casing with dry soft brush and prohibit all liquid cleaning reagents. Replace the complete module if continuous bus communication abnormality exists after excluding wiring and slave equipment faults, unauthorized disassembly and internal circuit modification are forbidden.