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ABB NDBU-85 DDCS Branch Unit
Item NO.:
NDBU-85Payment:
T/TPrice:
$2000Product Origin:
swedenColor:
SEWProduct weight:
0.94KGLead Time:
In stockWe will arrange delivery within 3-5 days after receiving the payment.
Our express delivery: DHL and FedEx.
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Destination country all taxes & duty to be paid by buyer
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The ABB NDBU-85 DDCS Branch Unit is a key component in ABB’s Distributed Digital Control System (DDCS), designed to manage data distribution and network management between the main controller and branch devices.
The NDBU-85 distributes data from the master controller to branch I/O modules while monitoring branch status and detecting faults.
With robust design and reliable communication, it is essential for complex industrial automation and process control networks.
| Parameter | Specification |
|---|---|
| Model | NDBU-85 |
| Type | DDCS Branch Unit |
| System | ABB Distributed Digital Control System (DDCS / Network 90) |
| Function | Branch data communication, network management, branch monitoring |
| Power Supply | 24 V DC (±10%) |
| Power Consumption | ≤ 10 W |
| Communication Interface | Trunk bus, branch bus (RS-485 or system bus) |
| Maximum Branch Nodes | 8 nodes (configurable) |
| Data Transfer Rate | Up to 1 Mbps (depending on bus type) |
| Communication Protocol | DDCS / Network 90 standard protocol |
| Indicators | LEDs for power, trunk, and branch communication status |
| Isolation | Optical isolation to prevent interference and ground loops |
| Operating Temperature | 0°C to +60°C |
| Storage Temperature | -25°C to +70°C |
| Humidity | 5%–95%, non-condensing |
| Protection Class | IP20 (cabinet installation) |
| Mounting | Plug-in module, rack or DIN rail |
| Dimensions | Approx. 180 × 100 × 35 mm |
| Weight | Approx. 0.35 kg |
Efficient data distribution – Quickly and accurately distributes data to branch I/O modules.
Reliable network communication – Optical isolation and industrial bus interfaces ensure stable communication.
Modular design – Plug-in structure simplifies installation, replacement, and maintenance.
Status monitoring & fault indication – LED indicators display power, trunk, and branch status for easy maintenance.
Flexible configuration – Supports up to 8 branch nodes, expandable according to site requirements.
Industrial grade design – Suitable for harsh environments with high EMC resistance.
Industrial process control systems (DCS)
Power generation and distribution automation
Petrochemical, chemical, and metallurgical process control
Smart manufacturing and production line monitoring
Water treatment and environmental control systems
Infrastructure and building automation
Mounting environment – Install in a dry, ventilated, dust-free cabinet, avoiding high temperature and humidity.
Power supply – Use a stable 24 V DC supply; observe polarity and voltage stability.
ESD protection – Wear an anti-static wrist strap during installation and maintenance.
Bus wiring – Branch and trunk buses should be properly wired; use shielded twisted-pair cables to reduce interference.
Periodic maintenance – Check terminal connections and LED indicators to ensure proper communication and module operation.
The structure and details of the product：
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