CIU888-interface

Product Description

It serves as a universal communication gateway, converting proprietary Enraf protocols (like Enraf BPM and WTP) into standard Modbus RTU/ASCII or TCP/IP, enabling direct connectivity with leading control systems such as Honeywell Experion, Emerson DeltaV, and ABB. The CIU888 supports up to 32 field instruments per channel and features dual redundant communication ports for high availability in critical applications. Built on a robust industrial platform, the CIU888 offers multi-drop RS-485 serial communication with surge protection, as well as Ethernet connectivity for remote monitoring and configuration. Its advanced firmware supports automatic device detection, live data polling, and event-driven updates, ensuring accurate and real-time inventory and tank farm data. The unit is housed in a compact DIN-rail mountable enclosure, suitable for installation in hazardous areas when paired with appropriate barriers (e.g., intrinsically safe isolators). The CIU888 is the successor to the earlier CIU888 model (often referred to as CIU888 Classic) and provides enhanced processing power, increased memory, and improved protocol handling. It is fully backward compatible with existing Enraf field devices, including SmartRadar, Proservo, and Entis+ probes, making it an ideal upgrade path for legacy tank gauging installations. With its flexible configuration software (Enraf Smart Configurator), engineers can easily set up communication parameters, data mapping, and alarm thresholds, reducing commissioning time and operational costs. The Honeywell Enraf CIU888 is a state-of-the-art Smart Fieldbus Interface unit designed for seamless integration of Enraf tank gauging instruments into modern Distributed Control Systems (DCS) and SCADA environments.

Basic Product Information

• Supports Modbus RTU/ASCII and Modbus TCP/IP for DCS/SCADA integration
• Native support for Enraf proprietary protocols (BPM, WTP) and HART
• Automatic device detection and configuration via Enraf Smart Configurator
• Redundant power input and communication ports for high availability
• DIN-rail mountable, compact design for easy installation
• Intrinsically safe interface options for hazardous area applications
• Real-time data polling with event-driven updates for accurate inventory
• Dual communication channels supporting up to 32 field instruments each

Technical Specifications

Version & Model Difference

The CIU888 is available in two main versions: the CIU888 Classic (older model) and the CIU888 Plus (current enhanced model). The Plus version features a faster processor, larger memory, and updated firmware that supports additional protocols like HART and improved Modbus mapping. It also includes a web-based configuration interface for easier setup. The Classic version is still supported but may require hardware upgrades for certain new features. Both versions are compatible with the same field devices, but the Plus version offers better performance in large-scale tank farms with higher data polling rates.

Application Scenarios

• Honeywell+Enraf UT762AGAZ Radar Level Transmitter (UT762AGAZ)