Product Short Description
Product Brief Introduction
Redundant bus communication termination module for DeltaV field communication links, providing physical wiring interface for Foundation Fieldbus H1 or serial field communication cables, built-in bus termination resistors and communication fault diagnostic indicators, supporting redundant communication channel hot-switchover.
Description
Technical Specifications
- Communication Bus Compatibility: Foundation Fieldbus H1, DeltaV local serial I/O bus
- Redundancy Support: Dual independent communication channel circuits for fault-tolerant backup
- Built-in Bus Termination: Software-selectable 100Ω communication termination resistor
- Isolation Rating: 1000 VAC isolation between communication bus and system backplane
- Wiring Terminal: Shielded twisted pair cable dedicated screw terminals with shield grounding lugs
Structural & Material Features
Shielded internal PCB layout to reduce communication electromagnetic interference, dual channel LED status indicators for primary/backup communication links, anti-vibration locking chassis connector.
Working Principle
Dual isolated communication circuits receive/transmit digital bus data between DeltaV controller backplane and field intelligent instruments; integrated termination resistors match bus impedance to eliminate signal reflection distortion. Automatic channel switchover occurs if primary communication link failure is detected, with fault alarm transmitted to DCS operation workstation.
Application Scenarios
- Redundant Foundation Fieldbus instrument networks in petrochemical and power plant safety systems
- Critical control loops requiring zero communication downtime for continuous production
Installation Notes
Only install bus termination resistor at the two physical endpoints of the fieldbus trunk cable; disable internal termination for mid-branch junction modules
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