PHOENIX IBS 24BK-I/O-T Compact Fieldbus Coupler for Decentralized Automation
Description
The PHOENIX IBS 24BK-I/O-T is a high-performance bus coupler and base terminal developed by Phoenix Contact for INTERBUS fieldbus systems.It serves as the communication gateway between the INTERBUS master(e.g.,PLC or DCS)and decentralized I/O modules,while simultaneously distributing 24VDC power via an integrated backplane.Designed for modular expansion,the IBS 24BK-I/O-T supports up to 64 I/O modules in a single segment,enabling flexible,cost-effective machine and process control architectures.
Application Scenarios
At a European automotive assembly line producing electric vehicle battery packs,engineers faced recurring communication dropouts on legacy AS-i networks during robotic welding cycles—causing misaligned cell stacking and scrap rates above 3%.By replacing the old system with a new INTERBUS architecture centered on the PHOENIX IBS 24BK-I/O-T,they achieved deterministic data exchange at 500 kbps with<1 ms cycle time.The IBS 24BK-I/O-T’s robust shielding,integrated 24V backplane,and support for hot-pluggable IBS IL 24 DI/DO modules eliminated EMI-induced errors.Within two months,scrap dropped to 0.4%,and line availability increased by 18%.This case highlights how the IBS 24BK-I/O-T transforms field connectivity from a vulnerability into a reliability asset.
Parameter
Main Parameters Value/Description
Product Model IBS 24BK-I/O-T
Manufacturer Phoenix Contact
Product Category INTERBUS Bus Coupler/Base Terminal
Communication Protocol INTERBUS(RS-485 physical layer,cyclic master-slave)
Data Transfer Rate Up to 500 kbps(auto-negotiated)
Max Supported I/O Modules 64 per segment(via daisy-chain or branch)
Backplane Power Supply 24 VDC,up to 10 A total(distributed to I/O modules)
Power Input 24 VDC external supply(terminals+/–)
Installation Method DIN rail(TS-35/7.5 or TS-35/15)
Operating Temperature–25°C to+60°C
Protection Rating IP20(for use inside control cabinets)
Diagnostics LED indicators for BUS,PWR,MODULE STATUS,FAULT
Hot-Swap Support Yes(with compatible IBS I/O modules)
Technical Principles and Innovative Values
Innovation Point 1:Integrated 24V Backplane Eliminates External Wiring
Unlike conventional bus couplers that require separate power cabling to each I/O module,the IBS 24BK-I/O-T delivers 24VDC through a conductive backplane—reducing wiring by up to 70%and minimizing installation errors.
Innovation Point 2:True Plug-and-Play INTERBUS Topology
The IBS 24BK-I/O-T automatically detects connected IBS modules and reports configuration to the INTERBUS master during startup—no manual addressing or DIP switches needed,accelerating commissioning.
Innovation Point 3:Robust EMI Immunity for Harsh Environments
Built with galvanic isolation,shielded connectors,and conformal coating options,the IBS 24BK-I/O-T meets IEC 61000-4-4(EFT)and IEC 61000-4-5(surge)standards—ideal for welding cells,presses,or outdoor enclosures.
Innovation Point 4:Scalable Architecture from 1 to 64 Modules
A single IBS 24BK-I/O-T can start with just two I/O modules and expand incrementally—perfect for pilot lines or phased automation rollouts without redesign.
Application Cases and Industry Value
In a North American food packaging facility,changeover between product formats used to take over 45 minutes due to manual reconfiguration of sensors and actuators.After deploying PHOENIX IBS 24BK-I/O-T terminals with IBS IL 24 DI/DO and AI/AO modules across 12 packaging machines,engineers implemented recipe-driven I/O mapping via the INTERBUS master.Changeovers now complete in under 8 minutes,with zero wiring mistakes.Maintenance teams also report 60%faster troubleshooting thanks to module-level diagnostics visible in the PLC HMI—all made possible by the intelligent architecture of the IBS 24BK-I/O-T.
Similarly,at a solar wafer production plant in Asia,the IBS 24BK-I/O-T enabled reliable control of 200+vacuum and gas valves in a Class 1000 cleanroom.Its low particulate emission design(no fans,sealed electronics)and immunity to RF noise from plasma etchers ensured consistent process repeatability—critical for micron-level wafer tolerances.
Related Product Combination Solutions
IBS IL 24 DI 16/2:16-channel digital input module—pairs seamlessly with IBS 24BK-I/O-T for sensor signals.
IBS IL 24 DO 16/2:16-channel digital output module for solenoid and relay control.
IBS IL 24 AI 4/SF-PAC:High-precision analog input for temperature and pressure loops.
IB IL 24/230 DOR 4/W-PAC:Relay output module for mains switching—extends IBS 24BK-I/O-T capability.
IBS PS/PB 24:Dedicated 24V power supply unit optimized for INTERBUS backplane loads.
IB ST 590:INTERBUS repeater for extending network distance beyond 400 m.
AXIOline F:Phoenix Contact’s next-gen I/O system—migration path from INTERBUS using IBS 24BK-I/O-T as interim solution.
PLCnext Control AXC F 2152:Modern controller with native INTERBUS master support for new installations.
Installation,Maintenance,and Full-Cycle Support
Installation of the PHOENIX IBS 24BK-I/O-T begins with DIN rail mounting and connection of 24VDC power and INTERBUS trunk cable(via spring-cage terminals).I/O modules snap onto the backplane without tools,and the system self-configures upon power-up.No software addressing is required—module order defines logical position,simplifying documentation.
For maintenance,the IBS 24BK-I/O-T provides clear visual diagnostics:green BUS LED=active communication,red FAULT=module error or short circuit.Failed I/O modules can be replaced live(hot-swap)without powering down the segment—minimizing downtime.Firmware updates are rarely needed,as the coupler operates as a stateless slave device.
We test every PHOENIX IBS 24BK-I/O-T on a live INTERBUS network with mixed I/O loads,verifying communication integrity,power distribution stability,and fault recovery.Units are cleaned,inspected for mechanical wear,and certified to original factory specifications.Backed by a 12-month warranty and supported by fieldbus-certified engineers,we ensure your INTERBUS infrastructure remains agile and dependable—even in legacy environments.
Contact us for a network topology review,spare parts kit,or fast delivery of genuine PHOENIX IBS 24BK-I/O-T bus couplers to keep your INTERBUS system running at peak performance.
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