Eight-Branch Expansion
Distributes one RS232/RS485 main connection to eight RS485 branch ports.
DT-9028I
Industrial 8-Port RS485 Hub
Expand an industrial serial network across eight protected RS485 branches with adaptive communication.
Distribute one RS232/RS485 main connection to eight RS485 branches with collision control, branch protection and wide-range DC power.
Hover to zoomDTECH DT-9028I industrial 8-port RS485 hub on a clean white background
Main InterfaceRS232 / RS485Bidirectional main connection
RS485 Branches8Independent branch protection
Maximum Branch Rate250 KbpsAdaptive baud rate
Node Capacity256 per portSource-specified capacity
Power InputDC 9–40VWide-range input
Product Overview
A practical path for bringing installed serial equipment into modern industrial data networks.
The DT-9028I is an industrial eight-port RS485 hub designed to expand one RS232/RS485 main connection across eight RS485 branches.
Adaptive baud-rate operation, built-in data collision protection control and branch-level short-circuit and open-circuit protection support larger serial networks while helping keep a branch fault from interrupting the other branches.
8RS485 branches
Distribute one main serial connection across eight field segments.
250 Kbpsmaximum branch rate
The branch rate adapts to the connected serial network.
256nodes per port
Source-specified device capacity for each branch.
2000Wline protection
Specified for each primary and secondary RS485 line.
Key Features
Core capabilities selected for reliable integration, flexible deployment and efficient maintenance.
Data Collision Protection
Built-in DCPC control supports stable data transfer on larger serial networks.
Adaptive Baud Rate
Automatically adapts communication speed with branch rates up to 250 Kbps.
Branch Fault Protection
Short-circuit or open-circuit conditions on one branch do not interrupt communication on the other branches.
RS232 ESD Protection
The main RS232 interface is specified with 15 kV ESD protection.
Wide DC Input
DC 9–40V input supports integration with industrial power systems.
System / Network Architecture
See how this product fits into an industrial serial communication network.
RS232/RS485 Main PortController, gateway or upstream serial network
Serial data
Protected branches
Eight RS485 BranchesIndependent serial network segments and field devices
Technical Specifications
Verified configuration details for engineering review and product selection.
Communication
- Model
- DT-9028I
- Main interface
- RS232 / RS485
- RS485 branch count
- 8
- Communication direction
- Bidirectional between the main and branch ports
- Maximum branch rate
- 250 Kbps
- Baud rate
- Adaptive
- Node capacity
- Up to 256 nodes per port
- Status indicators
- Power and signal
Protection and Power
- Data collision protection
- DCPC control
- Main RS232 protection
- 15 kV ESD
- RS485 line protection
- Two-level lightning and surge protection, 2000W per line
- Branch fault protection
- Short-circuit and open-circuit protection per branch
- Power input
- DC 9–40V
Related Products
Explore complementary DTECH connectivity products for adjacent signal paths and network requirements.
Frequently Asked Questions
Verified answers for product selection and project planning.
How many RS485 branches does the DT-9028I provide?
It provides eight RS485 branch ports connected to one RS232/RS485 main interface.
What is the maximum branch communication rate?
The legacy product specification lists a maximum branch rate of 250 Kbps with adaptive baud-rate operation.
What happens if one RS485 branch is shorted or open?
Each branch has short-circuit and open-circuit protection, and the source states that a fault on one branch does not affect communication on the other branches.
What power input does the DT-9028I require?
The standard input range is DC 9–40V.
Need Help Selecting the Right Product?
Share your device interfaces, network environment and project requirements with the DTECH industrial communication team.