This product is S500 series terminal base unit supporting hot swap function for ABB AC500 PLC I/O modules, manufactured in accordance with IEC industrial standards and ABB global production specifications. It is DIN rail mounting accessory used for fixing matched S500 I/O modules, centralized field signal wiring and establishing backplane bus connection between I/O modules and PLC main controller.

3BDM is fixed internal material coding prefix for ABB S500 series terminal base accessories.000199 is exclusive part serial number of this hot-swappable terminal base inside ABB internal product catalog.R1 represents the first revised hardware version with optimized internal power and bus contact structure.

Rated applicable field power supply is DC24V. Working ambient temperature ranges from -25℃ to +60℃, storage temperature covers -40℃ to +85℃, protection grade is IP20 for cabinet inner installation. The whole base passes IEC61000 EMC anti-interference and industrial anti-vibration certification.

Rear side is equipped with built-in bus connector to cascade adjacent terminal bases and compose complete system backplane bus. Upper buckle structure locks corresponding I/O module and realizes electrical connection of bus and power supply. All field sensor and load wires connect to base screw terminals, no independent Ethernet or serial communication port arranged on base body.

It provides installation carrier for matching S500 digital and analog I/O modules and concentrates all field wiring on base terminals for convenient field construction and later overhaul. With hot-swap design, relevant I/O modules can be replaced under powered system condition without stopping the whole PLC operation. It transmits backplane bus signals from CPU to mounted I/O modules to complete cyclic data interaction between controller and field peripheral devices.

It is widely matched with S500 I/O modules inside control cabinets of continuous production lines, chemical process control, water treatment automatic system and key equipment automation requiring non-stop maintenance.

Cut off system DC24V power during base installation, fix terminal base onto standard DIN rail and cascade multiple bases via rear bus connectors, then buckle I/O modules into position until fully locked. Complete field wiring strictly following terminal definition specification. Perform routine maintenance every six months, wipe dust on base shell and terminals with dry soft brush and prohibit liquid cleaning solvent. Replace the entire base when poor bus contact or terminal damage occurs after excluding wiring faults, unauthorized disassembly and internal structure modification are prohibited.