Industrial RS232 to RS485/RS422 Converter – DB9 Male to Terminal Block

Connect RS232 serial equipment to RS485 or RS422 communication systems with this compact industrial serial converter. Featuring a DB9 male RS232 connector and a four-position screw terminal block, this adapter is designed for industrial automation, equipment integration, instrumentation, and serial communication troubleshooting.

The converter provides a practical way to interface compatible RS232 equipment with differential RS485 or RS422 networks. Its compact enclosure, labeled terminal connections, and supplier-specified automatic data direction control make it suitable for field installations and industrial equipment applications.

Key Features

• RS232 to RS485/RS422 Conversion: Designed to connect compatible RS232 devices to RS485 or RS422 serial interfaces.

• DB9 Male Connector: Standard 9-pin D-Sub male connection for compatible RS232 equipment.

• Four-Position Screw Terminal Block: Provides secure field wiring connections.

• Clearly Labeled Terminals: Screen-printed T+, T−, R+, and R− terminal markings simplify connection identification.

• Port-Powered Design: Supplier specifies operation using power derived from RS232 signal lines, without an external power adapter.

• Automatic Direction Control: Supplier specifies automatic transmit/receive direction handling for compatible RS485 applications.

• Flexible Communication Modes: Supports 2-wire half-duplex RS485 and 4-wire full-duplex RS422, according to supplier specifications.

• Selectable Termination: Supplier specifies jumper-selectable 120Ω termination.

• Industrial Protection: Supplier specifies 600W surge protection and 15kV ESD protection.

• Long-Distance Communication: Supplier specifies transmission distances up to 1.2 km under suitable operating conditions.

Technical Specifications

Terminal Connection Identification

The four-position terminal block is labeled in the following order:

Terminal markings help identify the connections during installation. The appropriate wiring arrangement depends on the connected equipment and the selected RS485 or RS422 communication mode.

For 2-wire RS485 applications, consult the manufacturer's instructions to determine the required terminal connections. Do not assume that all RS485/RS422 converters use identical wiring arrangements.

Typical Applications

• Industrial automation and PLC communication

• Machine control and monitoring equipment

• RS232-to-RS485 equipment integration

• RS422 communication systems

• Legacy serial equipment upgrades

• Industrial instrumentation

• Field maintenance and troubleshooting

• Serial communications testing

Important Compatibility Information

This product converts between compatible RS232 and RS485/RS422 electrical interfaces. It does not provide USB or Ethernet connectivity and does not translate communication protocols.

Verify the DB9 connector gender, RS232 pin configuration, RS485/RS422 terminal wiring, termination settings, and power requirements before installation.

Because this converter is specified as port-powered, operation depends on the available power from the connected RS232 interface.

Actual communication distance and performance depend on cable quality, baud rate, electrical interference, grounding, termination, and equipment compatibility.

Technical Note: Operating ratings, protection specifications, and performance figures are based on supplier information and have not been independently verified by Industrial Netware.