Description
- Model: CI854AK01 (Complete Kit)
- Part Number: 3BSE030220R1
- Brand: ABB (Sweden)
- Series: System 800xA / AC 800M Controller Series
- Core Function: PROFIBUS DP-V1 Master Communication Interface
- Product Type: Communication Module Kit (Includes CI854A and Baseplate)
- Key Specs: Dual Ports (Redundancy Support) 12 Mbit/s DP-V1 Class 1 & 2
- Protocol: PROFIBUS DP-V1 (Master)
- Hardware Components: Includes CI854A module and TP854 baseplate
- Data Rate: 9.6 kbit/s up to 12 Mbit/s (Auto-detection)
- Max Slaves: Up to 125 slaves per module
- Redundancy: Supports Line Redundancy (Two modules for high-availability)
- Interface: 2 x 9-pin D-sub connectors (RS-485)
- Power Consumption: 24 VDC (Typ. 160 mA)
- Isolation: Galvanic isolation for communication ports
- Operating Temperature: +5 °C to +55 °C
ABB 3BSE030220R1 CI854AK01
Application Scenarios & Pain Points
The CI854AK01 is the standard gateway for an ABB AC 800M controller to “talk” to the rest of the factory floor. PROFIBUS is the backbone for thousands of ABB systems, connecting the PLC to drives, motor starters, and remote I/O like S800 or S900. If this module fails, the controller loses its “eyes and ears” for an entire segment of the plant, often leading to a total process shutdown.
Typical Application Scenarios:
- Drive Integration (ACS800 / ACS880) Managing speed references and status feedback from large lineups of ABB variable speed drives over a single PROFIBUS line.
- Remote I/O Expansion (S800/S900) Connecting the main AC 800M rack to distributed I/O clusters located in different electrical rooms or hazardous areas.
- Third-Party Device Linking Interfacing the ABB DCS with third-party instruments, weigh scales, or specialized analyzers that support PROFIBUS DP.
- Redundant Control Networks In critical applications like oil refineries or power plants, two CI854AK01 modules are used in a redundant pair to ensure zero downtime if one module fails.
Case Study: The “Intermittent Slave” Ghost
Background: A paper mill in Canada was experiencing random “Slave Lost” alarms on their PROFIBUS network. The DCS would momentarily lose contact with a bank of motor starters, causing the whole line to trip.
The Problem: After checking the cabling, we looked at the CI854A module. The internal ASIC was overheating due to a clogged cooling fan in the cabinet, leading to microscopic timing delays. Because PROFIBUS at 12 Mbit/s is extremely sensitive to timing (jitter), the master would drop the slaves.
The Solution: We provided a new CI854AK01 kit. We recommended replacing the entire kit (module + baseplate) to ensure the backplane connectors were fresh.
Result: The communication stabilized immediately. We also advised the client to lower the baud rate to 1.5 Mbit/s if 12 Mbit/s wasn’t strictly necessary for their process, increasing the overall noise immunity of the system.
Compatible Replacement Models
The CI854AK01 (3BSE030220R1) is the modernized “A” version. It is important to distinguish it from the older, non-“A” versions.
| Model Number | Compatibility | Main Difference | Integration Note |
| CI854AK01 | ✅ Direct | Current “A” revision | Supports DP-V1 and improved diagnostics. |
| CI854K01 | ⚠️ Legacy | Older non-“A” version | Can usually be replaced by CI854AK01 (Check firmware). |
| CI851 | ❌ Incompatible | PROFIBUS DP-V0 only | Different hardware and limited slave support. |
ABB 3BSE030220R1 CI854AK01
Troubleshooting Quick Reference
| Status LED | Meaning | Possible Cause | Action |
| Run (Green) | Normal Operation | Module is active and scanning. | No action required. |
| Fault (Red) | Hardware Failure | Internal module error. | Reseat the module; if it stays red, replace it. |
| Warning (Yellow) | Configuration Error | Slave mismatch or bus fault. | Check GSD files and slave addresses in Control Builder. |
| Line 1/2 (Flash) | Data Traffic | Normal bus communication. | No action required. |
Technical SOP & Quality Guarantee
Communication modules require specific “handshake” testing to ensure they are field-ready:
- Protocol Handshake: We connect the CI854A to a test AC 800M controller and verify it can scan a test PROFIBUS slave without CRC errors.
- Redundancy Switchover: If testing a pair, we simulate a module failure to ensure the “Backup” module takes over the bus within the required millisecond window.
- Port Stress Test: We check both D-sub ports for mechanical integrity and signal strength to ensure the RS-485 drivers are not weakened.
- Firmware Alignment: We can verify the firmware version (e.g., 5.x or 6.x) so it matches your existing 800xA system version.
Engineer’s Pro-Tip: When you install this module, ensure your 9-pin D-sub connectors have the “Terminating Resistor” switch in the correct position. If this module is at the end of the line, the switch must be ON. If it’s in the middle, it must be OFF. Incorrect termination is the #1 cause of CI854 errors.
