Isolated Serial Conversion
Converts single-ended RS232 communication for balanced RS485 or RS422 field links with 2500Vrms isolation.
DT-9026
Isolated RS232 to RS485/RS422 Converter
Optically isolated conversion from RS232 hosts to protected RS485 or RS422 field networks.
Connect RS232 equipment to RS485 or RS422 links with 2500Vrms isolation, protected serial interfaces and transmission up to 1200 metres.
Hover to zoomDTECH DT-9026 isolated RS232 to RS485 and RS422 converter on a pure white background
ConversionRS232 ↔ RS485/422Half- or full-duplex operation
Isolation2500VrmsOptoelectronic signal isolation
Baud RateUp to 115.2 KbpsAdaptive serial communication
DistanceUp to 1200 mCable and baud rate dependent
Power InputDC 9–24VExternal power supply
Product Overview
A practical path for bringing installed serial equipment into modern industrial data networks.
The DT-9026 converts a DB9 RS232 host interface for connection to RS485 or RS422 field equipment. The model-matched enclosure provides a removable terminal block and RJ45 connection on the differential serial side.
Optoelectronic isolation, 15kV ESD protection on the RS232 interface and 600W surge protection per RS485/RS422 line help protect connected equipment. Automatic data-direction control supports RS485 half-duplex and RS422 full-duplex communication without an RTS flow-control signal.
2500Vrmsisolation voltage
Separates the RS232 host side from the differential field link.
115.2 Kbpsmaximum data rate
Supports common industrial serial communication speeds.
1200 mmaximum distance
Source-specified reach at supported lower baud rates.
32supported nodes
Up to 32 RS485 or RS422 interface devices.
Key Features
Core capabilities selected for reliable integration, flexible deployment and efficient maintenance.
Half- and Full-Duplex Support
Supports asynchronous RS485 half-duplex and RS422 full-duplex operation.
Automatic Data Direction
Controls send and receive direction without an external RTS flow-control signal.
Protected Interfaces
Provides 15kV ESD protection on RS232 and 600W surge protection on each RS485/RS422 line.
Long-Distance Communication
Supports source-specified transmission up to 1200 metres depending on baud rate and cable conditions.
Communication Indicators
Power, transmit and receive indicators provide visible operating status.
Industrial Applications
Explore practical deployment scenarios for this DTECH industrial connectivity product.
Factory Automation
Connect an RS232 controller or workstation to RS485 or RS422 production equipment.
Energy Monitoring
Extend protected serial links to meters and field data-acquisition equipment.
Building and Access Control
Link RS232 management equipment with distributed RS485 or RS422 controllers.
System / Network Architecture
See how this product fits into an industrial serial communication network.
RS232 hostComputer, controller or serial workstation
Serial data
Protected branches
RS485 / RS422 field networkHalf-duplex or full-duplex protected differential serial link
Technical Specifications
Verified configuration details for engineering review and product selection.
Communication
- Model
- DT-9026
- Product type
- Active optically isolated RS232 to RS485/RS422 converter
- Interface compatibility
- EIA/TIA RS-232C, RS-485 and RS-422
- Working modes
- Asynchronous half duplex or asynchronous full duplex
- Maximum transmission rate
- 115.2 Kbps
- Maximum transmission distance
- Up to 1200 m, depending on baud rate and cable conditions
- Transmission medium
- Twisted-pair or shielded cable
- Supported devices
- Up to 32 RS485 or RS422 interface devices
Interfaces, Protection and Power
- RS232 interface
- DB9 female
- RS485/RS422 field connections
- Removable terminal block and RJ45 on the photographed model-matched enclosure
- Isolation voltage
- 2500Vrms
- RS232 protection
- 15kV ESD
- RS485/RS422 protection
- 600W surge protection per line
- Power input
- DC 9–24V
- Indicators
- Power, transmit and receive
- Recommended termination
- 120Ω, 1/4W at the line terminal when required by the installation
Environmental
- Operating temperature
- −25°C to 70°C
- Relative humidity
- 5% to 95%
- Mounting
- Integrated wall-mounting flanges
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.
What does the DT-9026 convert?
The DT-9026 converts a DB9 RS232 host interface for connection to RS485 or RS422 field equipment.
What isolation and interface protection does the DT-9026 provide?
The model-matched documentation specifies 2500Vrms isolation, 15kV ESD protection on the RS232 interface and 600W surge protection on each RS485/RS422 line.
What communication modes does the DT-9026 support?
It supports asynchronous RS485 half-duplex and RS422 full-duplex communication with automatic data-direction control.
How far can the DT-9026 transmit?
The verified sources specify transmission up to 1200 metres. Actual distance depends on baud rate, cable type, termination and installation conditions.
What power input does the DT-9026 require?
The model-matched DTECH manual specifies a DC 9–24V external power input.
Need Help Selecting the Right Product?
Share your device interfaces, network environment and project requirements with the DTECH industrial communication team.