Description
The ABB CI855K01 (Catalog / Ordering Part Number: 3BSE018106R1) is a high-performance Advant Masterbus 300 (MB300) Communication Interface Kit designed for ABB’s System 800xA and AC 800M controller family. Placed on a CEX-Bus baseplate beside an AC 800M CPU, the CI855K01 module enables AC 800M controllers to communicate natively over the high-speed MB300 deterministic peer-to-peer network, facilitating seamless integration with legacy Advant Controller 450 (AC450), MasterPiece, and MOD 300 control systems.
Key Specifications & Identification
| Attribute | Details |
| Manufacturer | ABB / Hitachi Energy |
| Kit Model Code | CI855K01 / CI855 |
| Catalog / Ordering P/N | 3BSE018106R1 |
| System Compatibility | ABB System 800xA / AC 800M Controller Architecture |
| Supported Network | Masterbus 300 (MB300) deterministic token-ring bus |
| Physical Medium | Coaxial cable (75-ohm broadband coaxial link with BNC connectors) |
| Module Placement | Plugs into CEX-Bus extension slot on AC 800M controller baseplate |
| Status Indicators | Front-panel diagnostic LEDs for Run, Error, Bus Activity, and Token status |
Primary System Functions
- Legacy System Interfacing: Bridges modern AC 800M controllers directly into older Advant Masterbus 300 networks, allowing plants to modernize their control tier while keeping existing legacy controllers operational.
- Deterministic Peer-to-Peer Communication: Manages high-speed, deterministic data exchange (datasets and element lists) across the MB300 coaxial ring network for coordinated multi-controller industrial processes.
- CEX-Bus Data Mapping: Translates incoming and outgoing MB300 process variables directly into the AC 800M controller CPU memory space for execution within Control Builder M applications.
- Network Health Diagnostics: Continuously monitors token ring continuity, bus node error counters, and packet loss rates, reporting communication alarms straight to 800xA operator environments.
Servicing & Installation Guidelines
- Coaxial Cable Integrity & Impedance: MB300 networks rely on strict 75-ohm coaxial cabling with proper BNC terminators at network ends. Inspect cables for signal attenuation, loose connectors, or shield grounding issues that can destabilize the token ring.
- Electrostatic Discharge (ESD) Protection: Sensitive CMOS processing chips and physical transceiver circuits require static controls. Always wear a grounded anti-static wrist strap when handling the CI855 module.
- Firmware & Library Version Matching: Ensure that the Control Builder M system libraries and AC 800M firmware revisions match the specific CI855 software requirements for your System 800xA deployment.
- CEX-Bus Locking Mechanism: Verify that the CEX-Bus mechanical locking levers are securely engaged on both sides of the module baseplate to guarantee solid backplane power and communication connection.
