This item is S500 series standard terminal base for ABB AC500 PLC I/O modules, manufactured conforming to IEC industrial standards and ABB global production specifications. It is DIN rail installation accessory for mechanical fixation of corresponding S500 I/O modules, centralized field signal wiring and backplane bus connection between I/O modules and PLC CPU.

3BDM is fixed internal part code prefix for ABB S500 terminal base products.000210 stands for unique internal catalog number of this terminal base.R is hardware version identifier of this base unit.

The rated applicable field power is DC24V. Operating ambient temperature ranges from -25℃ to +60℃, storage temperature ranges from -40℃ to +85℃, protection grade is IP20 for cabinet installation. The product passes IEC61000 EMC anti-interference and industrial anti-vibration certification.

Rear built-in bus connector is used for cascading adjacent terminal bases to form complete system backplane bus. Top snap locking structure connects matched I/O modules mechanically and electrically. All field input and output cables are wired on base screw terminals, no independent Ethernet or serial communication port on base body.

It serves as installation carrier for compatible S500 digital and analog I/O modules and collects all field wiring on base terminals to simplify field construction and later troubleshooting. It transmits backplane bus signals from main controller to installed I/O modules to realize cyclic data exchange between CPU and field peripheral equipment.

It is widely matched with S500 I/O modules in automation control cabinets of packaging machinery, water treatment, pump and fan control, textile equipment and general factory automation projects.

Disconnect DC24V system power before installation, mount base on standard DIN rail and cascade multiple bases through rear bus connectors, then fasten I/O modules onto base until fully locked. Complete field wiring in accordance with terminal definition requirements. Perform regular maintenance every six months, clear dust on terminals and base casing with dry soft brush and avoid liquid cleaning solvent. Replace the entire base when terminal damage or poor bus contact happens after eliminating wiring faults, unauthorized disassembly and internal structure modification are forbidden.