Product Overview
In a modern refinery, the ABB AC 800M controller in the central control room needs to collect thousands of temperature, pressure, and valve status signals distributed over several kilometers in real time – and the CI627A module is the key bridge for this “nerve ending connection.” As a standard communication interface unit for the AC 800M system, the CI627A converts the controller’s internal data bus into Profibus DP (Decentralized Periphery) fieldbus signals, enabling the system to communicate deterministically with remote I/O stations (such as ABB’s CI854 or Siemens ET200M) at speeds up to 12 Mbps.
Core Functions:
Acts as a Profibus DP slave, polled by the master (such as the AC 800M CPU);
Supports Profibus DP-V1. capable of transmitting periodic process data + non-periodic diagnostic/parameter data;
Can connect up to 126 Profibus slaves (limited by network topology);
Built-in LED status indicators (PWR, RUN, ERR, BF) for easy on-site fault diagnosis;
Works in conjunction with the AC 800M’s TB850/TB840 bus couplers to form a complete I/O architecture.
⚠️ Note: The CI627A cannot operate independently and must be installed on the I/O backplane (such as TB840) of the AC 800M control station and managed by the AC 800M CPU (such as PM864). Technical Specifications
Table
Item | Parameter
Model | CI627A
ABB Order Number | 3BSE013259R1
Manufacturer | ABB (Process Automation)
System | AC 800M Control Platform
Communication Protocol | Profibus DP / DP-V1 (Slave)
Transmission Rate | 9.6 kbps to 12 Mbps (automatic or manual configuration)
Physical Interface | RS-485. 9-pin D-SUB (male), shielded
Maximum Number of Slaves | 126 (standard Profibus limit)
Power Requirements | Powered by AC 800M backplane (+5V, +24V)
Mounting Method | Plugs into TB840/TB850 I/O backplane, DIN rail mounting
Operating Temperature | 0°C to +60°C
Protection Class | IP20 (installed in control cabinet)
Certifications | CE, UL, cUL, ATEX (depending on version)
Configuration Tool | Control Builder M (ABB official engineering software)
Key Features and Benefits
✅ Seamless integration with AC 800M: Plug-and-play, automatic recognition, no additional drivers required.
✅ High communication reliability: Supports Profibus redundancy (in conjunction with CI628A master module), cable diagnostics.
✅ Simplified wiring: Single twisted-pair cable replaces hundreds of hardwired connections, reducing installation and maintenance costs.
✅ Powerful diagnostic capabilities: Module-level + channel-level fault reporting to Control Builder M, supporting predictive maintenance.
✅ Open ecosystem compatibility: Can connect to third-party Profibus devices (such as Siemens, Pepperl+Fuchs, Endress+Hauser).
In a large seawater desalination plant, the CI627A connected 8 remote I/O stations, covering the high-pressure pump room, reverse osmosis unit, and dosing system, achieving unified monitoring of the entire plant’s Profibus network, reducing wiring costs by 40%. The ABB CI627A delivers robust, high-speed Profibus connectivity for the AC 800M control system. By bridging the controller to field devices over a single cable, it simplifies architecture, reduces wiring, and enhances diagnostic visibility—keeping your process running smoothly.
Application Areas
Power Industry: Boiler control, desulfurization systems, coal handling control
Petrochemical: Reactor temperature control, pipeline pressure monitoring, emergency shut-off valve groups
Water Treatment: Pumping station group control, chlorination systems, membrane filtration units
Metallurgy and Mining: Sintering machine control, hoist signal acquisition
Cement and Building Materials: Rotary kiln monitoring, raw material proportioning systems
Especially suitable for ABB AC 800M projects with existing Profibus infrastructure or requiring integration of third-party intelligent instruments.
Integration and Configuration Highlights
GSD file import, slave configuration, and I/O mapping must be performed using Control Builder M software.
Termination Resistors: 220Ω termination resistors must be enabled at the beginning and end of the Profibus network (usually set on the CI627A or the last slave).
Address Assignment: Each Profibus slave (including remote I/O stations) requires a unique station address (1–126).
Cable Requirements: Use Profibus-specific shielded twisted-pair cable (e.g., Belden 3079A), with maximum length depending on the baud rate (≤ 100 m at 12 Mbps).
Grounding Specifications: Single-point grounding of the shield to avoid ground loop interference.
⚠️ Note: The CI627A is a slave interface. If a Profibus master is required (e.g., for connecting to an HMI or PLC), the CI628A module should be used.
Lifecycle and Procurement Recommendations
The ABB CI627A (3BSE013259R1) is currently in active supply and is a standard communication module for the AC 800M platform. ABB is committed to long-term support. Therefore, it is a reliable choice for new projects and suitable for expansion or spare parts replacement in existing systems. Shenzhen Changxin, as an authorized partner of ABB automation products, provides you with:
100% genuine new products (with ABB labels, serial numbers, and factory test reports)
Function verification: Power-on test, Profibus communication, LED indicators, and backplane identification
Technical support: Providing GSD files, Control Builder M configuration templates, and wiring diagrams
In-stock inventory and 12-month warranty
We help system integrators and end-users build efficient, reliable, and easy-to-maintain distributed control systems.
For engineers building or maintaining an ABB AC 800M system, the CI627A is the trusted gateway to the Profibus field. We supply genuine units with full validation—so your process data flows reliably, from sensor to controller, every time.
