CI853A ABB AC 800M MODBUS RTU COMLI Module

Product Overview

The ABB CI853A functions as a high-performance, dual-channel RS-232 serial communication interface for the AC 800M controller platform. This module expands the connectivity of the System 800xA by providing dedicated ports for COMLI, MODBUS RTU, and Siemens 3964R protocols. We offer this unit as 100% Brand New original stock, ensuring full compatibility with modern industrial automation demands. It enables seamless integration with third-party devices, such as PLCs, weighing scales, and motor drives, without compromising the integrity of the main control logic.

Technical Specifications

Engineering Advantages

• Hot-Swap Capability: The CI853A allows for immediate module replacement while the controller remains energized. This eliminates system downtime during maintenance cycles or hardware upgrades, ensuring continuous process availability.

• Multi-Protocol Versatility: This module executes both ABB proprietary COMLI and open-standard MODBUS RTU protocols. Furthermore, it supports the Siemens 3964R protocol and self-defined serial strings, bridging the gap between disparate manufacturer hardware.

• Master/Slave Flexibility: While operating under the COMLI protocol, the CI853A functions in both Master and Slave modes. This allows the AC 800M to either dictate control or provide data to a higher-level supervisory system.

• Dial-up Modem Support: The hardware facilitates remote telemetry via dial-up modems controlled directly from the application layer. This feature enables data acquisition from remote unmanned stations over standard telephone lines.

• Galvanic Isolation: High-quality onboard isolation protects the internal controller bus from external electrical surges often encountered in long-distance RS-232 serial links.

Installation and Integration

Mount the CI853A onto the TP830 Baseplate or the appropriate extension rail. The AC 800M controller automatically detects the module via the CEX-bus. Engineers configure the specific port parameters (baud rate, parity, stop bits) using ABB Control Builder M software. For distances exceeding the standard RS-232 limit of 15 meters, we recommend using fiber optic converters to maintain signal integrity and prevent ground loop interference.

FAQs

• What is the difference between the built-in COM3 port and the CI853A?

  The CI853A provides two additional isolated ports, allowing for expanded connectivity and protocol diversity that the single built-in COM3 port cannot accommodate alone.

• Does the CI853A support MODBUS RTU Slave mode?

  No. The CI853A hardware specifically supports MODBUS RTU in Master mode only. If Slave mode is required, use the built-in ports of the AC 800M controller.

• Can I use this module for Siemens protocol communication?

  Yes. The CI853A supports the Siemens 3964R protocol, enabling direct serial data exchange with Siemens-compatible hardware over an RS-232 channel.

• Does this module require an external power supply?

  The module draws its primary operating power directly from the CEX-bus via the AC 800M controller, simplifying the wiring architecture within the cabinet.