Frequently Asked Questions (QA)

Q1: What is the CI858 used for?
A1: It enables DriveBus communication between AC 800M controllers and ABB drives.

Q2: How many drives can connect to one CI858?
A2: Up to 24 drives per module; up to two modules per controller.

Q3: Can modules be replaced live?
A3: Yes, it supports hot-swapping during operation.

Q4: What is its size and weight?
A4: Roughly 185×59×127 mm and weighs about 0.7 kg.

Q5: How is it powered?
A5: It draws power via the CEX-Bus—no extra wiring needed.

Q6: What topologies are supported?
A6: Supports star topology through NDBU branching units.

Q7: What’s its communication speed?
A7: Approximately 8 Mbit/s via DriveBus protocol.

Q8: Does it support redundancy?
A8: No built-in redundancy—but multi-module setups offer failover.

Q9: Where is it typically used?
A9: Used in rolling mills, paper machines, and other industrial environments needing precise drive control.

Q10: What certifications does it carry?
A10: CE, RoHS, WEEE, and marine compliance (ABS, BV, DNV‑GL, LR).