ABB CI855K01 Modulebus Interface Module – AC 800M Series
When a Modulebus interface fails in a live DCS environment, the entire communication link between the AC 800M controller and its S800 I/O stations collapses — process data stops flowing, alarms go unacknowledged, and operators lose visibility over critical field signals. In high-stakes industries like oil & gas, power generation, and chemical processing, even minutes of lost I/O communication can trigger emergency shutdowns or safety incidents. The ABB CI855K01 is the precision-engineered solution that keeps this link alive and reliable.
The CI855K01 occupies a well-defined technical position within ABB’s AC 800M controller family — it is the dedicated Modulebus interface card that enables the controller CPU to communicate with remote S800 I/O clusters over the Modulebus optical or electrical link. As part of ABB’s globally deployed AC 800M platform, which powers thousands of process automation installations across six continents, the CI855K01 represents a mature, field-proven component with a long service life and broad spare-parts availability.
Technical Specifications
- Part Number: CI855K01
- Brand: ABB
- Series: AC 800M
- Module Type: Modulebus Interface Module
- Function: Connects AC 800M controller to S800 I/O modules via Modulebus
- Communication Interface: Modulebus (optical / electrical)
- Mounting: Plugs directly into AC 800M controller rack
- Weight: 1,540 g (with packaging)
- Compatibility: ABB AC 800M controller family, S800 I/O modules
- Condition: New / Refurbished (specify on inquiry)
Key Features & Benefits
- Seamless I/O Integration: Provides a dedicated, high-speed Modulebus link between the AC 800M CPU and distributed S800 I/O stations, ensuring deterministic data exchange.
- Plug-and-Play Replacement: Designed for direct hot-swap compatibility within the AC 800M rack, minimizing downtime during maintenance or emergency replacement.
- Robust Industrial Design: Built to ABB’s stringent quality standards for continuous operation in harsh industrial environments — wide temperature range, vibration resistance, and EMC compliance.
- Long Product Lifecycle: Part of ABB’s long-term support commitment for the AC 800M platform, ensuring availability of spare parts and firmware updates.
- Scalable Architecture: Supports multi-drop Modulebus topologies, allowing a single controller to manage multiple I/O clusters across large process plants.
Industry & Equipment Applications
- Oil & Gas: Upstream wellhead control, midstream pipeline SCADA, downstream refinery DCS
- Power Generation: Turbine control systems, boiler management, substation automation
- Chemical & Petrochemical: Reactor control, batch processing, safety instrumented systems (SIS)
- Pulp & Paper: Continuous process control, quality management systems
- Water & Wastewater: Pump station automation, treatment plant DCS
- Marine & Offshore: Vessel automation, platform process control
System Integration & Compatible Parts
The CI855K01 is designed to operate within the ABB AC 800M ecosystem. Compatible and commonly paired components include:
- ABB PM866K01 / PM864K01 / PM861K01 — AC 800M Controller CPUs
- ABB TB840A / TB842A — Modulebus Optical Link Terminators
- ABB AI810 / AO810 / DI810 / DO810 — S800 I/O Modules
- ABB CI854K01 — PROFIBUS DP Interface Module (complementary fieldbus option)
- ABB CI856K01 — INSUM Interface Module
- ABB SB821 / SB822 — S800 I/O Cluster Bases
If you need help identifying compatible parts for your specific AC 800M configuration, contact our technical team at support@konmask.com.
Our Quality Assurance Process
- Source Verification: All ABB modules are sourced from authorized distributors or directly from decommissioned OEM installations with full traceability.
- Visual & Physical Inspection: Each unit is inspected for physical damage, connector integrity, and label authenticity before listing.
- Functional Testing: Where applicable, modules undergo bench-level power-on and communication testing.
- Anti-Static Packaging: All units are shipped in ESD-safe packaging with moisture barrier protection.
- Documentation: Original ABB datasheets and, where available, calibration or test records are included.
How to Order
- Submit your inquiry via the Contact / RFQ form on this page or email support@konmask.com.
- Provide your required quantity, preferred condition (new / refurbished), and any urgency requirements.
- Our team will respond within 24 hours with availability, lead time, and a formal quotation.
- Upon order confirmation, we arrange secure export packaging and international shipping via DHL / FedEx / UPS or your preferred freight forwarder.
Why Choose Konmask.com?
- ✅ Specialist Focus: We exclusively handle industrial automation components — ABB, Siemens, Honeywell, Rockwell, Yokogawa, and more.
- ✅ Global Reach: Serving clients in 50+ countries with reliable international logistics and export documentation.
- ✅ Technical Expertise: Our team includes experienced automation engineers who can assist with part identification, compatibility checks, and system integration advice.
- ✅ Fast Response: RFQ responses within 24 hours; emergency orders prioritized.
- ✅ Competitive Pricing: Direct sourcing relationships allow us to offer market-competitive pricing without compromising on quality.
Frequently Asked Questions
Q: What is the difference between CI855K01 and CI854K01?
A: The CI855K01 is a Modulebus Interface Module used to connect the AC 800M controller to S800 I/O modules. The CI854K01 is a PROFIBUS DP Interface Module used to connect the controller to PROFIBUS DP field devices. They serve different communication protocols and are not interchangeable.
Q: Is the CI855K01 compatible with all AC 800M controller versions?
A: The CI855K01 is compatible with the AC 800M controller family including PM860, PM861, PM864, and PM866 series CPUs. Please confirm your specific controller firmware version with our team to ensure full compatibility.
Q: Can I replace the CI855K01 while the system is running (hot-swap)?
A: Hot-swap capability depends on your specific AC 800M system configuration and firmware version. We recommend consulting ABB’s AC 800M Hardware documentation or contacting our engineers before attempting live replacement.
Q: Do you provide a warranty on the CI855K01?
A: Yes. All units sold through Konmask.com carry a minimum 90-day warranty against defects. Extended warranty options are available — please inquire when requesting a quote.
Q: How long does international shipping take?
A: Standard international express shipping (DHL/FedEx) typically takes 3–7 business days depending on destination. We also offer economy freight options for non-urgent orders.
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