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ABB TB840A 3BSE037760R1｜S800 I/O Communication Interfaces｜
TB840A 3BSE037760R1
1) Fiber optic Modular Bus Bridge (Extended Communication Distance)
electricity ↔ Fiber optic conversion: Convert the electrical Module Bus on the controller side to fiber optic, with a maximum distance of several kilometers and strong anti-interference capability.
Topology: Up to 7 I/O clusters can be mounted on the fiber optic cable, each with its own TB840A.
Electrical side: Local maximum of 12 S800 I/O cards (AI/DI/DO/AO, etc.).
2) Redundant communication (essential for high availability)
Dual fiber port redundancy: automatically switch to the other when one is disconnected, switch ABB without disturbance.
Module redundancy: Two TB840A modules can be inserted into the same station for redundancy, in conjunction with the TU840 base ABB.
Hot swappable: online replacement without stopping ABB.
3) I/O Station Management and Power Supply
Module Bus Monitoring: Real time monitoring of bus status and fault diagnosis for ABB.
Isolation power supply: Provide isolation 24V to local I/O cards and protect card ABB.
Expansion capability: When a cabinet has more than 12 I/O blocks, use TB840A cluster to expand ABB.
4) System integration (compatible with 800xA/AC800M)
As a fiber optic gateway for S800 I/O and AC800M/800xA.
Cooperate with communication cards such as CI858 and CI857 to form a complete DCS distributed I/O architecture.
Application scenarios
Power plant/station: boiler, steam turbine, auxiliary remote I/O station, long-distance fiber optic connection to the main control room.
Chemical/Petrochemical: Device differentiation for dispersed I/O, resistance to strong electromagnetic interference, and long-distance transmission in explosion-proof areas.
Metallurgy/Steel Rolling: Distributed I/O Cluster in High Temperature and High Noise Environments.
Old system transformation: Replace traditional centralized I/O with fiber optic distributed, reduce cables, and improve reliability.
ABB TB840A 3BSE037760R1｜S800 I/O Communication Interfaces｜
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