Passive RS232 to RS485 Serial Port Converter Module

The Passive RS232 to RS485 Serial Port Converter Module is a highly reliable, cost-effective solution for converting standard RS232 serial communication signals into balanced differential RS485 signals. Designed for industrial environments, this bidirectional converter extends your serial communication range up to 1200 meters without requiring any external power supply. It utilizes advanced port-powering technology, drawing operating power directly from the RS232 data lines (TXD, RTS, and DTR), making it incredibly easy to deploy in the field.

This communication converter is ideal for connecting modern microcontrollers, PLCs, SCADA systems, and industrial automation equipment over long distances. It features a DB9 female connector on the RS232 side and a DB9 male connector on the RS485 side, which interfaces seamlessly with the included 4-pin screw terminal adapter board. This terminal board provides clear, labeled connection points for D+/A, D-/B, GND, and an optional 5V-12V power input for applications requiring enhanced signal boosting over extreme distances.

Features:

• Passive Operation: No external power supply required; efficiently draws power directly from the RS232 TXD, RTS, and DTR signals.
• Long-Distance Transmission: Extends serial communication up to 1200 meters on the RS485 side, overcoming the 5-meter limitation of standard RS232.
• High-Speed Data Rates: Supports reliable asynchronous data transmission speeds ranging from 300 bps up to 115.2 kbps.
• Point-to-Multipoint Networking: Capable of supporting up to 32 nodes on a single RS485 bus network for multi-device communication.
• Convenient Terminal Block: Includes a pluggable DB9-to-screw-terminal adapter board for quick, secure, and solderless field wiring.
• Built-in Protection: Features integrated transient voltage suppression (TVS) to safeguard your sensitive host equipment from static and ground loops.

Package Includes:

1 x Passive RS232 to RS485 Serial Port Converter

1 x DB9 to 4-Pin Screw Terminal Adapter Board