DTECH DT-9028I 8 Port RS485 Hub – Industrial Grade, 9–40V DC

The DTECH DT-9028I 8 port RS485 hub lets one master device run eight separate RS485 branches. It turns a single long daisy chain into a star-style network that’s easier to wire, extend and troubleshoot. Each branch supports up to 256 nodes and has its own short and open circuit protection, so a fault on one line stays on that line. It has 2000W surge protection on every RS485 port, automatic baud rate detection and a wide 9–40V DC input, and it’s built for large building management, metering and industrial control networks.

Why Choose This 8 Port RS485 Hub

Large RS485 networks are hard to manage as one bus. Every new device adds cable length, and a damaged cable on one floor can take down devices further along the line. Finding the fault then means walking the whole route. This 8 port RS485 hub splits the network into eight independent branches from one master port. You can wire each floor, riser or production line separately and isolate problems quickly.

• Eight branches, one master: connect a PLC, PC, gateway or BMS controller to eight RS485 lines from a single port.
• Faults stay contained: short and open circuit protection on each branch stops one damaged line from bringing down the rest of the network.
• Big capacity: each port supports up to 256 nodes, which suits large metering and building management systems.
• Heavy-duty protection: dual-level 2000W lightning and surge protection on every RS485 port, plus 15kV ESD protection on the RS232 main port.
• Automatic baud rate: the hub detects the baud rate itself, so there are no DIP switches or settings to configure. Branch rates go up to 250 Kbps.
• Built-in collision control: data collision protection control (DCPC) manages traffic between branches, keeping communication stable.
• Works with RS232 or RS485 hosts: the main port accepts either standard, so it suits older PCs and modern controllers alike.
• Wide power input: runs on any DC supply from 9V to 40V, including standard 12V and 24V panel supplies. A 9–60V version is available on request.

Where Integrators Use the DT-9028I 8 Port RS485 Hub

System integrators, MEP and electrical contractors, facility management teams and industrial engineers use an 8 port RS485 hub wherever one controller needs to reach many devices across a large site. Typical applications include:

• Building management systems (BMS): run a separate Modbus RTU or BACnet MS/TP branch to each floor, plant room or wing.
• Energy and utility metering: bring hundreds of electricity, water and gas meters in different risers back to one data collector.
• Industrial automation: connect a PLC or SCADA system to drives, sensors and instruments on up to eight production lines.
• Solar farms and power plants: link inverter strings, combiner boxes and weather stations to one monitoring gateway.
• Access control and security: give each building zone its own reader and controller network.
• Car parks, tunnels and infrastructure: connect lighting, ventilation and sensor controllers across long, spread-out sites.

8 Port RS485 Hub Specifications

Getting the Best Performance from Your 8 Port RS485 Hub

Plan each branch as its own straight bus, running out from the hub to the devices on that floor or line. Use shielded twisted-pair cable, fit termination resistors at the far end of long branches, and keep the A (+) and B (-) polarity the same on every device. Longer branches run more reliably at lower baud rates such as 9600 or 19200. Earth the cable shield at one point only to avoid ground loops. For more on the standards and protocols involved, see these overviews of RS-485 and Modbus.

Installation Tips

1. Mount the 8 port RS485 hub in your control panel, riser cupboard or enclosure.
2. Connect the master device (PC, PLC, BMS controller or gateway) to the main RS232/RS485 port.
3. Wire each RS485 branch to its own port, and label the cables by floor, zone or line.
4. Connect a DC supply between 9V and 40V.
5. Check that the power LED is on, then watch the signal LEDs as the master polls each branch.

Buy the 8 Port RS485 Hub in Dubai from BAM

Bait Almajara Trading (BAM) supplies connectivity, power and AV accessories to system integrators, contractors, facility managers and corporate procurement teams across the UAE, GCC, Africa and Central Asia. Order the DTECH DT-9028I 8 port RS485 hub for a single building or a multi-site roll-out, with trade pricing on volume and fast dispatch from our Dubai stock. Only need two branches? See our 2 port RS485 hub. Explore more connectivity products at BAM, or contact our team for a project quote.

Frequently Asked Questions

What does an 8 port RS485 hub do?

It connects one master device to eight separate RS485 branches, so you can wire a large network as several short lines instead of one long daisy chain.

What happens if one branch is damaged?

Each branch has its own short and open circuit protection, so a fault on one line doesn’t affect the other seven.

How many devices can I connect?

Each port supports up to 256 nodes, which gives a large capacity across all eight branches.

Do I need to set the baud rate?

No. The hub detects the baud rate automatically, with branch rates up to 250 Kbps.

What power supply does it need?

Any DC supply from 9V to 40V, including standard 12V and 24V panel supplies. A 9–60V version is available on request.