ABB CI920AN Communication Interface S900

3BDH000692R1 ABB CI920AN Communication Interface for Non-Hazardous Areas

Product Introduction

The ABB CI920AN (article number 3BDH000692R1) is a communication interface designed for the S900 distributed I/O system operating in safe (non-hazardous) areas. This module links the internal CAN bus to an external PROFIBUS DP-V1 fieldbus compliant with IEC 61158.

Unlike its Zone 2-rated counterpart, the CI920AN does not include intrinsic safety features. Therefore, you should only install it in non-hazardous locations. Nevertheless, it retains all essential capabilities for demanding industrial environments.

You can place the S900 system directly in the field. Consequently, marshalling and wiring costs are greatly reduced. Additionally, the system is sturdy and error-tolerant, making it ideal for continuous process applications.

Key Technical Specifications

The ABB CI920AN operates as version V2.1 (CIPBA). It fully complies with PROFIBUS DP-V1 (IEC 61158). For redundant communication setups, always use two CI920AN modules with identical firmware. Check the Release Notes before commissioning.

Core communication features include:

• PROFIBUS DP-V1 fieldbus protocol

• HART over PROFIBUS DP-V1 for smart instrument integration

• Line or media redundancy using two coupling modules

• Electrical isolation between fieldbus and power supply

• Full diagnostics, configuration, and parameterization via PROFIBUS

Furthermore, this interface supports HART pass-through without extra wiring. Therefore, you can access valuable device data directly from your control system.

Redundancy and Hot Maintenance

The 3BDH000692R1 supports both power and communication redundancy. As a result, system uptime improves considerably. Moreover, the CI920AN enables hot configuration in run and full hot swap functionality.

Integrated disconnection mechanisms allow you to replace a faulty module without interrupting the primary voltage. Thus, maintenance teams save time and avoid costly production stops. This feature is especially valuable in continuous processes like refining or chemical production.

Environmental and Mechanical Data

Although designed for non-hazardous areas, the ABB CI920AN still handles tough conditions. It carries an ISA-S71.04 G3 coating for corrosive atmospheres. Therefore, it works reliably in plants with high humidity or chemical exposure.

• Ambient temperature range: -20 °C to +60 °C

• Relative humidity: 93% ±3% at 40 °C

• CE mark: Yes

• RoHS compliance: Directive 2011/65/EU

• WEEE compliance: Directive 2012/19/EU

Mechanical dimensions are compact:

• Width: 20 mm (0.79 in)

• Depth: 104 mm (4.09 in)

• Height: 104 mm (4.09 in)

• Unit weight: 0.13 kg (0.29 lbs) – gross weight with packaging is 0.32 kg.

Frequently Asked Questions (FAQ)

1. Can I use the ABB CI920AN in a Zone 2 hazardous location?
No, the CI920AN lacks intrinsic safety certification for hazardous areas. For Zone 2 installations, choose the ABB CI920AB (3BDH000691R1) instead.

2. What happens if I mix firmware versions on redundant CI920AN modules?
For PROFIBUS DP-V1 redundancy, both CI920AN modules must run identical firmware. Mixed versions cause communication failures. Always consult the Release Notes.

3. Does the 3BDH000692R1 support HART pass-through?
Yes, HART over PROFIBUS DP-V1 is fully supported. Therefore, you can access HART device diagnostics, calibration data, and process variables from your control system.

4. How do I configure line redundancy on the CI920AN?
Connect two coupling modules to the same CI920AN. Then, enable media redundancy in your PROFIBUS configuration tool. The interface automatically manages the redundant path.

5. Is the CI920AN compatible with all S900 I/O modules?
Yes, the ABB CI920AN works with all S900 I/O types including analog, digital, and temperature modules. However, remember that this interface does not support intrinsically safe field devices.