ABB CTB811 Communication Terminal Board

ABB CTB811 Communication Terminal Board
Basic Positioning
It belongs to the Symphony Plus (S+) DCS system accessory components. It is a dedicated communication terminal board on the right side of the HPC800 controller. It is used in conjunction with the MB810 installation base to expand external wiring and communication interfaces for the controller. It is used in conjunction with high-frequency control cabinets in thermal power and chemical industries.

Core Function
Expansion of external interface: Accepts the external communication wiring of the HPC800 controller, integrates RS485 serial port and Ethernet wiring positions, and can be connected to on-site instruments and third-party lower-level devices; The redundant controller kit HPC800K02 requires 2 CTB811 pairs for use.
Connection and wiring simplification: Fixed on the right side of the MB810 base, the internal signals of the controller are led out as standardized wiring terminals, making on-site wiring and later maintenance and component replacement more convenient.

Operation status visualization:

Comes with LED indicators, which provide real-time feedback on power supply, link connection, and fault alarm status, facilitating operation and maintenance in troubleshooting.
Key technical parameters Table
Parameter item Specification details
Adapter for main controller HPC800 series controller, MB810 installation base
Communication interface RS485 (baud rate 1200~115200bps), Ethernet port
Power supply specification DC24V ± 10%
Operating temperature range -25℃ ~ +60℃
Humidity requirement 5%~95% without condensation (installed in cabinet, IP20 protection)
Dimensions 243.84×73.66×170.18mm
Net weight Approximately 0.77kg
Origin Switzerland, Sweden as the main batch
Compatibility with the same series components
Main controller: HPC800 (computing core)
Base: MB810 (base for the entire machine)
Right-side expansion: CTB811 (external communication terminals)
The previously queried cRBX01 + RMU610A: used for HN800 remote I/O optical fiber relay networking, the two belong to two different scenarios: local controller expansion and remote substation extension. They are often combined to build a complete power plant DCS architecture.

Typical application scenarios
Main control DCS cabinet for thermal power units, chemical process control systems, used to connect frequency conversion equipment, on-site transmitters, and third-party subsystems, to achieve external serial port / Ethernet communication expansion of the controller.