Product Overview
When managing motor control in industrial environments, the ABB CI857 provides a robust solution for integrating INSUM devices with AC 800M controllers. This master communication module leverages standard Ethernet technology to enable longer communication distances, multidrop configurations, and precise time distribution with time stamping in switchgear. The CI857 is powered directly via the CEX-Bus from the processor unit, eliminating the need for an external power source.
Technical Specifications Breakdown
The CI857 supports up to 128 motor control units (MCUs) or other INSUM devices per module, with a maximum of 6 CI857 modules per AC 800M controller. It communicates using ABB's INSUM protocol at a transmission speed of 10 Mbit/s. The module features an RJ-45 female connector (8-pin) and consumes typically 150 mA at 24 V. It operates within a temperature range of 0 to +55 °C (+32 to +131 °F) and can be stored from -40 to +70 °C (-40 to +158 °F). The CI857 is IP20 protected according to EN60529 and IEC 529, and is G3 compliant for corrosion protection per ISA 71.04. It supports hot swap, allowing replacement without system shutdown, and is CE marked with RoHS compliance (EU, UAE, CN RoHS) and WEEE compliance (DIRECTIVE/2012/19/EU).
Industry Applications
The CI857 excels in applications requiring centralized motor control and monitoring. For example, in a large manufacturing plant, it can integrate up to 128 MCUs across multiple substations, enabling fast closed-loop control with a typical response time of 500 ms. This is particularly beneficial in processes where rapid coordination between motors is critical, such as conveyor systems or pump stations. The module's support for up to 2 INSUM TCP/IP gateways per CI857 and 4 LonWorks subnets per gateway makes it ideal for distributed architectures.
Installation & Setup Guidance
Mount the CI857 on a DIN rail within the AC 800M cabinet. Connect it to the CEX-Bus using the provided connector; no additional power supply is needed. Use a standard RJ-45 Ethernet cable to link the module to the INSUM TCP/IP gateway. Ensure the operating temperature stays within 0 to +55 °C for reliable performance. The hot swap capability allows you to replace the module without powering down the system, minimizing downtime during maintenance.
Maintenance & Reliability
Regularly inspect the RJ-45 connector and CEX-Bus connections for wear or corrosion. The CI857's G3 corrosion protection ensures durability in harsh environments. With a typical closed-loop speed of 500 ms, the module maintains high performance under normal conditions. Verify that the firmware is up to date to ensure compatibility with the latest AC 800M controllers.
Compatibility & Integration
The CI857 is designed for use with ABB AC 800M controllers, including PM864, PM866, and PM861. It integrates seamlessly with HI controllers and supports up to 6 modules per controller. The module communicates via ABB's INSUM protocol over Ethernet, with a maximum of 128 MCUs per CI857. It can manage up to 2 INSUM TCP/IP gateways, each supporting 128 INSUM devices across 4 LonWorks subnets.
Selection Guide & Purchasing Advice
Before purchasing the ABB CI857 (article number 3BSE018144R1), verify that your AC 800M controller supports the required number of modules. For systems with PM864 or PM866, you can use up to 256 MCUs total; with PM861, the limit is 128 MCUs. Ensure your network infrastructure supports 10 Mbit/s transmission speed. SpareTechPLC offers this module with detailed support to help you integrate it into your existing setup.
Frequently Asked Questions
Q: How many CI857 modules can I use in one AC 800M system?
A: You can install a maximum of 6 CI857 modules per AC 800M controller.
Q: Does the CI857 require an external power supply?
A: No, the CI857 is powered via the CEX-Bus from the processor unit, so no external power source is needed.
Q: What is the maximum number of MCUs per CI857?
A: Each CI857 supports up to 128 MCUs or other INSUM devices.
Q: Can I replace the CI857 while the system is running?
A: Yes, the CI857 supports hot swap, allowing replacement without shutting down the system.
Q: What communication protocol does the CI857 use?
A: It uses ABB's INSUM protocol over Ethernet at 10 Mbit/s.
