1747-UIC USB to DH-485 Interface Converter with RS-232 and RS-485 Ports

The 1747-UIC is a USB communication interface converter designed for connecting a computer to DH-485 industrial networks.

It provides a direct USB connection from a modern computer to legacy serial automation devices that use DH-485 communication. The interface includes both an RJ45 DH-485 connection and an RS-232 serial interface, allowing flexible connection options for maintenance and programming tasks.

Unlike simple USB-to-serial adapters, the 1747-UIC is specifically designed for DH-485 communication environments, helping technicians connect, troubleshoot and maintain existing control systems without requiring a native serial computer port.

The compact interface includes communication status indicators for monitoring connection activity during commissioning and diagnostics.

Key Features

• USB to DH-485 communication conversion
• RJ45 DH-485 interface
• RS-232 serial connection support
• Three communication status LEDs
• Direct PC connection for maintenance
• Designed for legacy serial automation networks
• Compact portable interface

Typical Applications

• Legacy controller programming
• Factory equipment maintenance
• Serial network diagnostics
• Machine troubleshooting
• Control system replacement projects

USB to DH-485 Conversion Function

The main purpose of 1747-UIC is converting a computer USB connection into a DH-485 communication interface.

It enables technicians to:

• Connect laptops without serial ports
• Access existing DH-485 networks
• Perform controller maintenance
• Monitor communication status
• Support troubleshooting operations

It is designed specifically for DH-485 networks and is not a general-purpose USB communication adapter.

Dual Serial Connection Options

The interface provides two communication paths:

DH-485 Port

Used for direct connection to compatible DH-485 devices.

RS-232 Port

Used for serial communication connection scenarios.

The correct cable type and communication settings must be selected according to the connected device.

Legacy System Maintenance Application

The 1747-UIC is mainly valuable for maintaining existing installed equipment.

Typical maintenance tasks include:

• Program upload and download
• Controller diagnostics
• Network troubleshooting
• Parameter checking
• Equipment commissioning

For new machine designs, newer Ethernet-based communication interfaces are normally preferred.

Communication Status Monitoring

The interface includes LED indicators for:

• Power status
• USB communication activity
• Network communication activity

These indicators help technicians quickly identify connection and communication conditions during troubleshooting.

1747-UIC vs Standard USB Serial Adapter

1747-UIC

Dedicated DH-485 communication interface

Supports industrial network connection

Designed for controller maintenance

Standard USB-RS232 Adapter

General serial conversion only

May not support DH-485 protocol requirements

Not designed specifically for industrial controller communication

The main difference is protocol compatibility rather than physical USB conversion.

1747-UIC vs Ethernet Communication Interface

1747-UIC

USB and serial DH-485 communication

Suitable for legacy equipment

Ethernet Interface

Network-based communication

Suitable for modern automation architectures

The 1747-UIC is primarily used where existing machines still rely on DH-485 communication.

Connection Notes

Before use, verify:

• Correct DH-485 cable type
• Communication protocol settings
• Computer driver compatibility
• Controller communication configuration
• Serial port selection
• Network node settings

A physical connection alone does not guarantee communication without correct configuration.

Replacement and Maintenance Considerations

Before replacing an existing communication interface, confirm:

• Required protocol
• Device communication port
• Cable configuration
• Software compatibility
• Driver installation
• Controller firmware requirements

Similar-looking USB adapters may not provide DH-485 communication capability.

Installation Notes

• Install required communication software
• Connect the USB cable to the computer
• Connect DH-485 or RS-232 interface
• Confirm LED communication status
• Select correct communication driver
• Verify network parameters
• Test online connection before modification

FAQ

Q1: What is the main function of 1747-UIC?

A1: It converts a computer USB connection into a DH-485 communication interface.

Q2: Does it support DH-485 communication?

A2: Yes. DH-485 is its primary communication function.

Q3: Does it have an RS-232 port?

A3: Yes. It provides an additional RS-232 communication interface.

Q4: Is it a PLC controller?

A4: No. It is a communication interface converter used for programming and maintenance.

Q5: Can a normal USB-to-serial adapter replace it?

A5: No. Standard adapters may not support DH-485 protocol communication.

Q6: What type of applications use this interface?

A6: It is mainly used for maintaining existing serial-based automation systems.

Q7: Is this suitable for new automation projects?

A7: It is mainly intended for legacy equipment maintenance rather than new Ethernet-based systems.

Q8: Does it provide communication status indication?

A8: Yes. It includes LED indicators for communication monitoring.