Description
| Product Model | CI858K01 |
| Manufacturer | ABB |
| Product Category | PROFIBUS DP Communication Interface Module |
| Compatible System | ABB 800xA / S800 I/O / AC 800M Controller |
| Redundancy Support | Yes (1:1 redundancy with CI858K02) |
| PROFIBUS Protocol | DP-V0/V1 (supports DPV1 acyclic communication) |
| Data Transfer Rate | 9.6 kbps to 12 Mbps (auto-negotiating) |
| Max Devices per Segment | 125 nodes (with repeaters) |
| Electrical Interface | RS-485 (9-pin D-Sub connector) |
| Isolation | 500V AC (field-to-system) |
| Power Consumption | 1.7W typical (24VDC) |
| Operating Temperature | -40°C to +70°C (-40°F to +158°F) |
| Certifications | UL, ATEX/IECEx Zone 2, DNV GL |
Product Introduction
The ABB CI858K01 is a high-performance PROFIBUS DP interface module engineered for seamless integration within ABB’s flagship 800xA distributed control systems. As a critical communication gateway, this ruggedized module enables real-time data exchange between AC 800M controllers and field devices (sensors, drives, I/O blocks) across industrial networks. Designed for mission-critical applications, the CI858K01 supports both standard cyclic process data and advanced DPV1 acyclic services for parameterization and diagnostics.
Part of ABB’s S800 I/O family, the CI858K01 features hot-swappable installation and 1:1 redundancy capabilities when paired with CI858K02. Its value lies in unifying disparate automation components – from motor starters to complex analyzers – into a cohesive PROFIBUS DP network managed through 800xA’s engineering environment. The module’s dual-port design allows daisy-chaining without external repeaters, significantly reducing cabling costs in large plants. For industries requiring deterministic control, the ABB CI858K01 delivers sub-1ms update times at 12Mbps while maintaining IEC 61158-2 compliance for electromagnetic immunity in harsh environments.

ABB CI858K01
Core Advantages and Technical Highlights
Deterministic performance: The ABB CI858K01 achieves 0.8ms cycle times at 12Mbps with 32 bytes of I/O data, ensuring precise synchronization for motion control and safety interlocks. Time-stamped diagnostics capture network events with 1μs resolution for rapid fault isolation.
Robust redundancy: Dual-module hot standby (with CI858K02) enables <100ms>
Advanced diagnostics: Integrated PROFIBUS analyzer captures signal quality metrics (SNR, telegram counts) directly in Control Builder M engineering software. Ground fault detection on field wiring prevents network-wide shutdowns.
Multi-vendor integration: Certified for interoperability with >5,000 PROFIBUS devices from Siemens, Festo, Yokogawa, etc. The GSD library manager automatically imports device descriptions for rapid commissioning.
Future-proof architecture: Supports PROFIBUS PA via segment couplers and enables migration to PROFINET through ABB’s network transition gateways. Firmware updates without hardware replacement extend service life beyond 15 years.
Typical Application Scenarios
Power plant control: In coal-fired boilers, the ABB CI858K01 networks 80+ smart transmitters monitoring steam pressure/temperature across 200m distances. Redundant pairs ensure millisecond-level data acquisition for burner management systems.
Oil & gas separation: Offshore platforms use the module’s ATEX certification to connect subsea valve actuators in Zone 2 areas. DPV1 services enable remote calibration of Coriolis meters without network interruption.
Automotive manufacturing: Robotic welding cells leverage the CI858K01‘s 12Mbps speed to synchronize servo drives across conveyor systems. Telegram fragmentation handles >244-byte payloads for complex drive parameter sets.
Water treatment plants: Integrates sludge density meters and VFD-controlled pumps into 800xA, with intrinsic safety barriers enabling connection to IS-certified devices in hazardous wet wells.
Related Model Recommendations
CI858K02: Redundant partner module for 1:1 backup configuration
CI854A: PROFINET Controller/Device interface
CI855: Modbus TCP/IP communication interface
PM851AK01: AC 800M controller CPU (requires CI858 for fieldbus)
SD832: Redundant power supply for S800 rack
TB852: PROFIBUS termination board
LD800H: DIN-rail mounted PROFIBUS repeater
PP875: PROFIBUS PA linking device
SA801F: Intrinsic safety isolator

ABB CI858K01
Installation, Commissioning and Maintenance Instructions
Installation preparation: Verify rack power shutdown and discharge S800 backplane capacitors (>2 minutes). Use ESD wrist strap during handling. Ensure proper slot assignment – CI858K01 requires dedicated communication slot in S800 rack. Prepare PROFIBUS connectors with integral terminators (ABB TB852 recommended).
Commissioning procedure: Set node address via rotary switches (0-125). Configure redundancy through Control Builder M’s FDM tool. Perform signal integrity test using built-in SNR measurement. Validate failover by physically extracting active module while monitoring process continuity.
Maintenance suggestions: Quarterly inspection of connector strain reliefs. Annually clean backplane contacts with isopropyl alcohol. Monitor “Quality” LED status – amber indicates signal degradation. Replace modules at >80% of MTBF (typically 15 years). Always install firmware patches during planned shutdowns using Compact Flash loader. Maintain spare CI858K01/CI858K02 pairs pre-configured with base parameters.



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