RS232 to single-mode fiber converters allow RS232 serial signals to be transmitted over long distances via single-mode fiber, providing isolation, EMI/RFI protection, and distances up to 40 km.

Overview

RS232 to single-mode fiber converters are industrial-grade devices that convert standard RS232 serial signals into optical signals for transmission over single-mode fiber. These converters are ideal for long-distance communication, environments with electrical noise, or applications requiring galvanic isolation between devices .

Key Features

• Distance: Typically up to 20 km to 40 km depending on the model and fiber quality .
• Connectors: Common fiber connectors include SC, ST, and FC types .
• Data Rates: Support serial speeds from 300 bps up to 115.2 kbps, with some models handling non-standard baud rates up to 921.6 kbps .
• Power: Most units require external DC power (commonly 9–36 VDC or 12–48 VDC), with some models capable of using RS232 pin 9 for power .
• Isolation & Protection: Provide galvanic isolation, surge protection (up to 600W), and ESD protection (up to 15 kV) to safeguard connected equipment .
• Plug-and-Play: Many converters feature auto data direction control, eliminating the need for software drivers or manual configuration .
• Mounting Options: Wall, panel, rack, or DIN-rail mounting is supported for industrial installations .

Popular Models

1. SerialComm 232-FIBER-SM: Supports RS232 to single-mode fiber with ST or SC connectors, distances up to 20 km, 0–128 kbps, and external power supply included .
2. CommFront FBR-Serial-2 (SM/SC or SM/ST): Extends RS232/RS422/RS485 up to 40 km, supports multi-drop networks, rugged ABS housing, and auto-sensing data format .
3. Moxa TCF-142-S-SC: RS232/422/485 to single-mode SC fiber, supports 50 bps to 921.6 kbps, fiber ring support, and operating temperature 0–60°C .
4. EXSYS EX-6300SM: RS232 to single-mode SC fiber, 20 km range, 1310 nm wavelength, supports up to 921.6 kbps, DIN-rail mountable .
5. Omnitron iConverter 8767-1: RS232 DB9 to LC single-mode dual fiber, 30 km range, supports up to 115.2 kbps, chassis-powered, hot-swappable .
6. RDC rdc232SFO: RS232 to single-mode fiber with SC, ST, or FC connectors, 20 km range, intrinsic isolation, 9–36 VDC power, compact DIN-rail design .

Applications

• Industrial automation and control systems
• Remote monitoring and telemetry
• Secure or EMI-sensitive environments
• Long-distance serial communication where copper cabling is impractical

Summary

RS232 to single-mode fiber converters provide a reliable, long-distance, and electrically isolated solution for serial communication. When selecting a converter, consider distance requirements, connector type, data rate, power options, and environmental conditions. Most industrial models are plug-and-play, support auto data direction, and include surge and ESD protection, making them suitable for harsh environments .