Product Overview
In modern process automation, seamless communication between controllers and remote I/O is critical. The ABB CI856 S100 I/O Software License 800xA provides a robust interface for AC 800M controllers, enabling reliable data exchange with S100 I/O units across up to five racks. As a master module on the CEX-Bus, the CI856 simplifies system architecture while preserving existing field wiring—a key advantage for legacy ABB Master and Advant OCS installations.
Part of the ABB 800xA ecosystem, the CI856 is powered directly from the processor unit via the CEX-Bus, eliminating the need for an external power supply. This reduces installation complexity and improves system reliability.
Technical Specifications
The ABB CI856 module delivers dependable performance in demanding industrial environments. Below are the essential parameters:
| Parameter |
Value |
| Article Number |
3BSE026055R1 |
| Communication Protocol |
ABB's S100 I/O |
| Master/Slave |
Master |
| Line Redundancy |
No |
| Module Redundancy |
No |
| Hot Swap |
Yes |
| Used with HI Controller |
Yes |
| Max Units on CEX Bus |
12 |
| Connector |
Miniribbon (36-pin) |
| 24 V Consumption (typ.) |
120 mA |
| Operating Temperature |
0 to +55 °C (+32 to +131 °F) |
| Storage Temperature |
-40 to +70 °C (-40 to +158 °F) |
| Corrosion Protection |
G3 compliant to ISA 71.04 |
| Protection Class |
IP20 (EN60529, IEC 529) |
| CE Marking |
Yes |
| RoHS Compliance |
EU RoHS, UAE RoHS, CN RoHS |
| WEEE Compliance |
DIRECTIVE/2012/19/EU |
| Width |
59 mm (2.3 in.) |
| Height |
185 mm (7.3 in.) |
| Depth |
127.5 mm (5.0 in.) |
| Weight (including base) |
700 g (1.5 lbs) |
Key Features & Benefits
-
Reuse existing I/O: The CI856 allows you to keep most of your existing I/O installation, including terminations and field wiring, from ABB Master and Advant OCS systems—reducing upgrade costs significantly.
-
Single connection to up to five I/O racks: One CI856 can interface with multiple S100 I/O racks, each holding up to 20 I/O boards, maximizing density while minimizing footprint.
-
Code locking device: Prevents mounting of incompatible components, ensuring system integrity.
-
Hot swap capability: Replace or add I/O modules without shutting down the system, minimizing downtime.
Industry Applications
The ABB CI856 module is well-suited for continuous process industries such as chemical, oil & gas, power generation, and pulp & paper. For example, in a chemical plant upgrading to 800xA, the CI856 lets you retain existing S100 I/O wiring, cutting project time and material costs. In a power plant, the module's hot swap feature allows live maintenance of I/O racks, keeping critical processes running. For a water treatment facility, the single-cable connection simplifies installation across multiple remote racks.
Installation & Setup Guidance
Mount the CI856 on the TP856 baseplate, which provides DIN-rail mounting and a ribbon connector to bus extender boards. Ensure the baseplate is correctly seated on the CEX-Bus to establish communication. No external power is needed; the module draws power from the processor unit via the CEX-Bus. Verify that the code locking device aligns properly to prevent incorrect mounting. For hot swap operations, follow standard ESD precautions.
Maintenance & Reliability
Routine checks should focus on the ribbon connector and baseplate contacts for dust or corrosion. Operating temperature range of 0 to +55 °C allows installation in standard control cabinets; ensure adequate ventilation. The IP20 protection class means the module is not dust-tight—keep it in a clean enclosure. With no moving parts, the CI856 offers long service life; periodic visual inspection is sufficient.
Compatibility & Integration
The CI856 is designed for AC 800M controllers and works with HI Controller configurations. It communicates using ABB's S100 I/O protocol over the CEX-Bus, supporting up to 12 units on the bus. It is fully compatible with ABB 800xA systems, making it a seamless addition to existing ABB infrastructure.
Selection Guide & Purchasing Advice
Before purchasing the ABB CI856, verify your controller compatibility (AC 800M) and confirm that you have the TP856 baseplate. Ensure your system requires no line or module redundancy, as this model does not support those features. For reliable sourcing, PLC Source PRO offers genuine ABB modules with fast delivery. Check the article number 3BSE026055R1 to confirm the exact model.