Industrial Serial RS232/485/422 to Fiber Optic Media Converter, Bidirectional Single-Mode SC Port
Price range: $41.99 through $83.50
⚠️ Crucial Ordering Note: A/B Pairing Required
This is a WDM Single-Fiber device. You MUST use an A-End unit and a B-End unit together for them to communicate. Two A-Ends or two B-Ends will not establish a link. Please ensure you add both types to your cart if you are building a new link.
Product Overview
The Valtoris VT-FB820 is an industrial grade physical layer media converter that extends legacy RS232, RS485 or RS422 serial networks to 20 kilometers over a single optical fiber. It provides complete isolation against electromagnetic interference (EMI) making it a perfect drop-in solution for factory automation, solar plants and heavy industrial SCADA telemetry.
Quick Specs & Compatibility
- Fiber Type: Single-Mode (SM), Single-Fiber, Bi-directional. (Not compatible with Multi-Mode).
- Optical Interface: Standard SC Connector.
- Max Distance: 20 km.
- Serial Interfaces: 3-in-1 Auto-sensing. 1x RS232 (DB9) & 1x RS485/RS422 (Terminal Block).
- Baud Rate: Auto-adaptive up to 115200 bps. True plug-and-play, no DIP switches required.
- Latency: Zero-delay single-bit hardware decoding for real-time polling.
- Power Supply: DC 9~24V wide voltage input (Supports both 5.5mm DC jack and Terminal Block).
Wavelength Specifications
| Model Type | Transmit (TX) | Receive (RX) |
|---|---|---|
| VT-FB820-A (A-End) | 1310nm | 1550nm |
| VT-FB820-B (B-End) | 1550nm | 1310nm |
| Hardware & Interfaces | |
| Serial Ports | 1x RS232 (DB9) / 1x RS485 & RS422 (Terminal Block) |
| Power Input | 9~24V DC (5.5mm Jack or Terminal Block) |
| Power Consumption | 357mA @ 9V |
| Fiber Optic Communication | |
| Fiber Type | Single-Mode, Single-Fiber, Bi-directional |
| Optical Connector | Standard SC Interface |
| Transmission Distance | Up to 20 Kilometers |
| Wavelength (A-End) | TX: 1310nm / RX: 1550nm |
| Wavelength (B-End) | TX: 1550nm / RX: 1310nm |
| Serial Data Parameters | |
| Baud Rate | Auto-adaptive up to 115200 bps |
| Data & Check Bits | 5~9 Data Bits. None, Odd, Even, Mark, Space |
| Mechanical & Environment | |
| Dimensions | 9.4cm × 6.5cm × 2.5cm (L x W x H) |
| Operating Temp. | -40°C to +85°C |
Weight: 0.650 kg
1. VT-FB820 main unit x1
2.1M Serial line x 1
3. OPTIONS 12V 1.0A power adapter x1 
