Product Overview
The ABB CI920AB Communication Interface (article number 3BDH000691R1) is a critical component of the S900 remote I/O system, designed for demanding industrial environments. This module enables seamless communication between field devices and control systems using the PROFIBUS DP-V1 (IEC 61158) protocol. With its compact design and robust construction, the CI920AB is engineered for reliability and ease of service, making it an ideal choice for process automation applications.
Part of the S900 I/O type B family, the ABB CI920AB supports installation in hazardous areas (Zone 2) and connects intrinsically safe field devices located in Zone 2, Zone 1, or Zone 0. Its integrated disconnection mechanisms allow module replacement during operation without interrupting the primary voltage, minimizing downtime and enhancing system availability.
Technical Specifications
| Parameter |
Value |
| Article Number |
3BDH000691R1 |
| Signal Type |
Communication Interface |
| HART |
Yes |
| SOE |
N/A |
| Redundancy |
Yes |
| Intrinsic Safety |
Yes |
| Mechanics |
S900 |
| CE Mark |
Yes |
| Hazardous Location |
ATEX Zone 2 |
| Corrosive Atmosphere |
ISA-S71.04 G3 |
| Relative Humidity (max) |
93% ± 3% at 40 °C |
| Max Ambient Temperature |
-20 °C to 60 °C |
| RoHS Compliance |
Directive 2011/65/EU (EN 50581:2012) |
| WEEE Compliance |
Directive 2012/19/EU |
| WEEE Category |
Small Equipment (≤50 cm) |
| Width |
20 mm (0.79 in.) |
| Depth |
104 mm (4.09 in.) |
| Height |
104 mm (4.09 in.) |
| Weight |
0.13 kg (0.29 lbs.) |
Key Features & Benefits
-
ATEX Certification for installation in Zone 2 hazardous areas.
-
Redundancy for both power and communication, ensuring high availability.
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Hot Configuration in Run allows parameter changes without stopping the process.
-
Hot Swap functionality enables module replacement during operation.
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Extended Diagnostics and simplified maintenance via auto-diagnostics.
-
G3-coating protects all components against corrosive atmospheres.
-
Fieldbus protocol PROFIBUS DP-V1 (IEC 61158) with HART over PROFIBUS.
-
Line or media redundancy via two coupling modules.
-
Electrical isolation between fieldbus and power.
Industry Applications
The ABB CI920AB is ideally suited for process industries where hazardous area classification and intrinsic safety are critical. Typical applications include:
-
Oil & Gas: Remote I/O in Zone 2 areas, connecting sensors and actuators in wellhead control and pipeline monitoring.
-
Chemical Processing: Intrinsically safe field devices in reactors and distillation columns, reducing marshalling costs.
-
Pharmaceutical Manufacturing: Compliance with stringent safety standards while maintaining flexible production lines.
By deploying the CI920AB directly in the field, you reduce the need for extensive marshalling cabinets and long cable runs, lowering both installation and maintenance costs.
Installation & Setup
Installing the ABB CI920AB is straightforward, but a few guidelines ensure optimal performance:
- Mount the module on a standard DIN rail in a suitable enclosure rated for Zone 2.
- Ensure proper grounding and shielding of PROFIBUS cables to avoid electromagnetic interference.
- When using redundancy, pair two CI920AB modules with matching firmware versions; refer to the Release Notes for compatibility.
- Use the integrated disconnection mechanisms to replace modules without powering down the bus.
Maintenance & Reliability
Designed for rugged environments, the CI920AB requires minimal maintenance. The G3-coating protects against corrosive gases, while auto-diagnostics alert you to potential issues before they escalate. Regular checks of PROFIBUS termination and cable integrity are recommended. With redundancy options, you can achieve high system availability, reducing unplanned downtime and associated costs.
Compatibility & Integration
The ABB CI920AB communicates via PROFIBUS DP-V1 (IEC 61158), making it compatible with a wide range of PLCs and DCS systems that support this standard. It integrates seamlessly with the S900 I/O system and supports HART devices over PROFIBUS, allowing for unified configuration and diagnostics via FDT/DTM tools.
Buying Guide
Before purchasing, verify that your system's firmware matches the CI920AB version (V2.1, CIPBA-B) for redundancy applications. Ensure that the environmental conditions (temperature, humidity, corrosive atmosphere) fall within the specified limits. For expert advice and competitive pricing, trust PLC Source PRO as your reliable supplier of industrial automation parts.