Product Overview
In the evolving landscape of industrial automation, the need for reliable and safe communication in hazardous environments has never been greater. The ABB CI920AS 3BDH000690R1 is a communication interface designed to meet these demands, serving as a critical link between the S900 I/O system and higher-level control systems via the PROFIBUS DP-V1 protocol. This module is part of the S900 I/O type S family, specifically engineered for installation in Zone 1 hazardous areas, where it can connect intrinsically safe field devices located in Zone 0, Zone 1, or Zone 2. With features like redundancy, hot swap, and extended diagnostics, the CI920AS ensures minimal downtime and robust performance in challenging industrial settings.
Key Technical Specifications
The CI920AS offers several critical specifications that define its capabilities:
- Communication Protocol: PROFIBUS DP-V1 (IEC 61158) – ensuring standardized and reliable fieldbus communication.
- Redundancy: Supports redundancy for both power and communication, enhancing system availability.
- Intrinsic Safety: Certified for use with intrinsically safe field devices, suitable for hazardous locations.
- Environmental Rating: ATEX Zone 1 certification, with a corrosive atmosphere rating of ISA-S71.04 G3.
- Operating Temperature: -20 °C to 60 °C, allowing deployment in extreme conditions.
- Dimensions: Compact form factor of 20 mm width, 104 mm depth, and 104 mm height, with a weight of only 0.14 kg.
These specs make the CI920AS a versatile choice for industries requiring high reliability in hazardous zones.
Industry Applications
The CI920AS is ideal for applications in oil and gas, chemical processing, and pharmaceutical manufacturing, where equipment must operate safely in explosive atmospheres. For example, in a refinery, the module can connect pressure transmitters and temperature sensors in Zone 1 areas to a distributed control system (DCS) using PROFIBUS DP-V1. Its redundancy feature ensures continuous operation even if one communication path fails, reducing costly shutdowns. Additionally, the hot swap capability allows maintenance without interrupting the primary voltage, a significant advantage in continuous process industries.
Installation and Setup Guidance
Installing the CI920AS within an S900 I/O system requires careful attention to hazardous area classifications. The module is designed for Zone 1 installation, so ensure the enclosure meets ATEX requirements. Mount the unit securely using the provided DIN rail clip, and connect the PROFIBUS DP-V1 cable to the designated fieldbus port. For redundant setups, use two CI920AS modules with identical firmware versions, as specified in the release notes. Always verify that the power supply is isolated and that the intrinsic safety barriers are properly configured before energizing the system.
Maintenance and Reliability
The CI920AS is built for low-maintenance operation, thanks to its auto-diagnostics and G3-coating that protects against corrosive atmospheres. Regularly inspect the module for any physical damage or contamination, especially in harsh environments. The extended diagnostic features allow you to monitor communication health and detect faults early, preventing unexpected failures. With redundancy and hot swap support, you can replace a faulty module without system downtime, maximizing overall equipment effectiveness (OEE).
Compatibility and Integration
This communication interface integrates seamlessly with ABB S900 I/O systems and any control system supporting PROFIBUS DP-V1. It couples the internal CAN bus to the external PROFIBUS network, enabling HART over PROFIBUS for analog device data. The module supports line or media redundancy via two coupling modules, and configuration is simplified through FDT/DTM tools. Ensure your controller firmware is compatible with the CI920AS version 2.1 to leverage all features.
Purchasing Advice
Before ordering the ABB CI920AS, verify your system's compatibility with PROFIBUS DP-V1 and confirm the hazardous area classification matches your installation. SpareTechPLC offers this module with full warranty and fast shipping, ensuring you receive genuine ABB parts. Contact our team for assistance with redundancy configurations or to check current lifecycle status.
Frequently Asked Questions
Q1: Can the CI920AS be used in non-hazardous areas?
Yes, the S900 I/O system can be installed in non-hazardous areas, but the CI920AS is specifically certified for Zone 1 hazardous locations.
Q2: What firmware version is required for redundancy?
Use only CI920AS modules with the same firmware version (version 2.1) for PROFIBUS DP-V1 redundancy, as per the release notes.
Q3: Does the module support HART communication?
Yes, the CI920AS supports HART over PROFIBUS DP-V1, allowing access to HART device data.
Q4: What is the maximum ambient temperature for operation?
The module operates reliably in ambient temperatures from -20 °C to 60 °C.
Q5: Is the CI920AS compliant with RoHS and WEEE directives?
Yes, it complies with DIRECTIVE/2011/65/EU (RoHS) and DIRECTIVE/2012/19/EU (WEEE), with WEEE category for small equipment.
