Overview
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | CI853A |
| Brand | ABB |
| Product Type | Communication Interface Module |
| System Platform | ABB Advant Controller AC 800M |
| Weight | Approx. 0.68 kg |
| Dimensions | 59 mm x 185 mm x 127.5 mm |
| Operating Temp | Not specified |
| Power Consumption | Approx. 100 mA at 24 VDC |
| Power Supply | 24 VDC via CEX-Bus backplane |
| Communication Channels | 2 serial communication channels |
| Supported Protocols | Modbus RTU, COMLI, Siemens 3964R, Free / Self-defined ASCII |
| Baud Rate | Configurable from 75 bps to 115.2 kbps |
| Electrical Isolation | Optical isolation on serial ports |
| Protection Class | IP20 |
| Environmental Compliance | G3 compliant according to ISA 71.04 |
| Certifications | CE, RoHS, WEEE, ABS, BV, DNV-GL, LR |
ABB AC 800M Backplane Communication and Firmware Compatibility
The CI853A integrates with the ABB AC 800M control platform through the CEX-Bus backplane interface. Therefore, the module maintains direct system communication for serial protocol processing and channel management. The hardware supports configurable communication parameters, allowing integration with devices using Modbus RTU, COMLI, Siemens 3964R, and user-defined ASCII protocols.
In addition, the CI853A supports ABB industrial control architecture requirements, including backplane bus communication velocity management, I/O system expansion, and firmware compatibility within supported AC 800M configurations. The optical isolation design reduces electrical interference between external serial networks and the controller system.
Frequently Asked Questions
Q: Does the ABB CI853A support isolated serial communication channels?
A: Yes. The CI853A provides optical isolation on the serial ports to reduce ground-loop effects and electrical interference during field communication.
Q: Which communication protocols can be configured on the CI853A?
A: The module supports Modbus RTU, COMLI, Siemens 3964R, and Free / Self-defined ASCII communication modes through its serial interfaces.
Q: How does the CI853A receive operating power?
A: The module receives 24 VDC power through the AC 800M system CEX-Bus backplane connection.
Field Installation Guidelines
Install the ABB CI853A inside a protected control cabinet with an IP20-rated environment. Mount the module according to the AC 800M hardware installation requirements and ensure correct mechanical engagement with the system backplane.
Connect serial communication wiring using appropriate shielded cables. Furthermore, terminate cable shields according to site grounding practices to reduce electromagnetic interference. Separate serial communication cables from high-voltage power wiring and motor drive cables where possible.
Before commissioning, verify the configured communication parameters, including baud rate, protocol selection, and device addressing. Confirm that the CEX-Bus connection is properly seated and that the controller firmware supports the installed CI853A module revision.
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