Basic Info
- Model: CI855K01
- Part No.: 3BSE018106R1
- Manufacturer: ABB (Sweden)
- Type: MB300 Communication Module (Master)
- System: AC 800M, 800xA
- Dimensions: 59 × 185 × 127.5 mm (W×H×D)
- Weight: 0.7 kg (with baseplate)
- Certifications: CE, UL, cUL, RoHS, WEEE, Marine (BV, DNV-GL, LR)
- Protection: IP20, Corrosion G3 (ISA 71.04)

Key Specs
- Protocol: ABB MasterBus 300 (MB300)
- Role: Master
- Interface: Dual RJ45 Ethernet (Redundant)
- Speed: 10 Mbit/s
- Data Capacity: 200 Datasets/s
- Line Redundancy: Supported
- Module Redundancy: Not Supported
- Power: CEX-Bus (24V DC)
- Power Consumption: 150 mA typical @ 24V DC
- Temp Range: +5°C to +55°C (operating); -40°C to +70°C (storage)
- Hot Swap: Supported

Core Features
- Legacy System Integration: Connects AC 800M to old ABB controllers (Advant OCS, MasterPiece, AC410/450).
- Seamless Upgrade: Preserves existing field devices, smooth migration to 800xA.
- Redundant Ethernet: Dual-port network redundancy for high availability.
- Hot Swap & Diagnostics: Maintenance without downtime; LED status indicators.
- High-Speed Communication: 10 Mbps, 200 datasets/s, clock synchronization.

Applications
- System Upgrades: Legacy Advant OCS/Master to 800xA migration.
- Hybrid Plants: Mixed new/old ABB systems for full plant data exchange.
- Power/Metallurgy/Chemical: Substations, rolling mills, chemical process control.
- Process Industries: Pulp & paper, cement, water treatment.

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