Description

1. Product Title

ABB NDBU‑85C – DDCS Optical Branching Unit

2. Product Overview

The NDBU‑85C is a DIN‑rail‑mount DDCS optical branching unit designed for ABB drive systems, distributing optical DDCS communication signals between master drive and multiple follower drive units. It provides one master channel and eight follower channels, supporting 5 Mbit/s POF optical fibre communication for multi‑drive coordinated control. Galvanically isolated 24 VDC power supply eliminates ground‑loop interference between drive cabinets. This branching unit builds reliable multi‑drive optical communication networks, resolving signal‑degradation risks of copper‑based multi‑drive interconnections.

3. Technical Specifications

• Brand: ABB
• Model: NDBU‑85C
• Warranty: One Year
• Condition: 100% New & Original
• Function: DDCS optical branching unit
• Communication: DDCS POF optical fibre, 5 Mbit/s
• Channels: 1 master, 8 follower outputs
• Power Supply: 24 VDC ±10 %, galvanically isolated
• Mounting: DIN‑rail
• Dimensions: 263 × 95 × 55 mm
• Weight: 0.95 kg
• 

4. Application Scenarios

• Multi‑Drive Production Lines: Optical signal distribution for coordinated ABB variable‑frequency drive groups in material‑handling systems.
• Paper & Pulp Machine Drives: DDCS‑network branching unit for multi‑motor drive systems on paper‑processing machinery.
• Heavy‑Duty Industrial Drive Cabinets: Optical‑isolated communication hub for multi‑drive cabinets with high electromagnetic noise levels.