ABB CI920AB Communication Interface S900

3BDH000691R1 ABB CI920AB Communication Interface for PROFIBUS DP-V1

Product Introduction

The ABB CI920AB (article number 3BDH000691R1) is a high-performance communication interface for the S900 distributed I/O system. This device enables seamless data exchange between the internal CAN bus and an external PROFIBUS DP-V1 fieldbus.

You can install the S900 system directly in the field, even in hazardous areas. Consequently, marshalling and wiring costs drop significantly. For Zone 2 installations, the CI920AB carries full ATEX certification. Additionally, it supports intrinsically safe field devices located in Zone 0, Zone 1, or Zone 2.

Furthermore, this interface provides electrical isolation between the fieldbus and the power supply. Therefore, system reliability improves, especially in harsh industrial environments.

Key Technical Specifications

The ABB CI920AB complies with IEC 61158 for PROFIBUS DP-V1. It operates as version V2.1 (CIPBA-B). When using redundant configurations, always pair two CI920AB units with identical firmware. Refer to the official Release Notes for compatibility details.

Key communication features include:

• PROFIBUS DP-V1 protocol support

• HART over PROFIBUS DP-V1 for smart device integration

• Line or media redundancy via two coupling modules

• Electrical isolation between fieldbus and power

• Full diagnostics, configuration, and parameterization through PROFIBUS

For process automation, HART support allows you to access additional device data without extra wiring. Therefore, the 3BDH000691R1 is ideal for both greenfield and retrofit projects.

Redundancy and Hot Maintenance

This interface supports both power and communication redundancy. As a result, system uptime increases significantly. Moreover, the CI920AB enables hot configuration in run and hot swap functionality. That means you can replace a faulty unit without interrupting the primary voltage.

Integrated disconnection mechanisms allow module replacement during operation. Thus, maintenance teams save time and avoid unplanned downtime.

Environmental and Mechanical Data

The ABB CI920AB is built for demanding locations. It carries ATEX Zone 2 certification and an ISA-S71.04 G3 coating for corrosive atmospheres. Therefore, it performs reliably in chemical plants, oil refineries, and offshore platforms.

• 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)

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

Installation Guidelines

Install the 3BDH000691R1 inside an S900 I/O station located in Zone 2 hazardous areas or non-hazardous locations. First, ensure the backplane bus is properly terminated. Next, mount the interface module onto the DIN rail. Then, connect the PROFIBUS DP cable to the front connector.

For redundant communication, use two CI920AB modules with identical firmware versions. Additionally, verify the fieldbus termination settings. Finally, power up the system and configure the device using an FDT/DTM tool. Extended diagnostic data is available via PROFIBUS.

Packaging List

• 1 x ABB CI920AB communication interface (3BDH000691R1)

• 1 x product label with serial number

• 1 x quick start guide (printed)

Note: Cables, connectors, and mounting hardware are sold separately. No certificates or warranty documents are included.

Shipping Information

All orders are shipped via Fedex, UPS, or DHL with tracking numbers. Delivery times vary by destination.

Frequently Asked Questions (FAQ)

1. Can I use the ABB CI920AB with non-intrinsically safe field devices?
Yes, the CI920AB can connect both intrinsically safe and non-intrinsically safe devices. However, for Zone 0 or Zone 1 field devices, you must use intrinsic safety barriers.

2. What happens if I mix firmware versions on redundant CI920AB modules?
For PROFIBUS DP-V1 redundancy, both CI920AB units must have the same firmware version. Mixed versions cause communication errors. Always check the Release Notes.

3. Does the 3BDH000691R1 support HART pass-through?
Yes, HART over PROFIBUS DP-V1 is fully supported. Therefore, you can access HART device diagnostics and parameters from the control system.

4. How do I configure the CI920AB for line redundancy?
You need two coupling modules connected to the same CI920AB. Then, enable media redundancy in the PROFIBUS configuration tool. The interface handles the rest automatically.

5. Is the CI920AB compatible with all S900 I/O modules?
Yes, the ABB CI920AB works with all S900 I/O types, including analog, digital, and temperature modules. For Zone 2 hazardous areas, it supports intrinsically safe field wiring as well.