Desktop Fiber Optic to Serial Converter 1*100M Fiber Ports to RS-232/485/422 Auto-Sensed Port
Feature
- Support for RS-232, RS-485, and RS-422 interfaces
- Support for full/half-duplex communication
- Asynchronous transmission for point-to-point applications
- SC/FC/ST optical interfaces available upon request
- Built-in power adapter with wide-range AC 100-240V input
- Plug-and-play design for easy maintenance
- One-key port isolation configuration
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Product Detail
Description
The SH-277 fiber optic to serial converter supporting asynchronous RS-232, RS-485, and RS-422 communication interfaces. It is the optimal solution for connecting Remote Terminal Units (RTUs) to Hosts or Distributed Data Acquisition System (SCADA) controllers.
Key Features:
- Supports multiple asynchronous communication protocols: RS-232, RS-485, and RS-422.
- Allows simultaneous mixed use of two RS-232, RS-485, or RS-422 interfaces.
- Supports 2-wire (half-duplex) RS-485 and 4-wire (full-duplex) RS-422 operation modes.
RS-485 Mode Enhancements:
TXD/SD data transmission control improves compatibility with various software systems and simplifies control mechanisms.
Fiber Optic Connectivity:
- Enables full-duplex or half-duplex communication between asynchronous serial ports via fiber optic links.
- Communication distances up to 4km (multi-mode) or 20km (single-mode).
- Maximum data rates:RS-232: Up to 115.2 KbpsRS-485/RS-422: Up to 460 Kbps
Flexible Interface Mixing:
- Allows seamless connection between devices with different electrical standards (e.g., RS-232 to RS-485/RS-422).
- Functions as both an RS-232 to RS-485/422 converter and an optoelectronic isolator.
- Provides excellent EMI/RFI protection for reliable operation in industrial environments.
Order Guide
| Model | Interface Specification | Form Factor |
|---|---|---|
| SH-277S-20-SC | 1x 100M dual-fiber SC optical port (20KM, 1310nm) to 1x RS-485/232/422 adaptive interface (3-in-1) | Desktop |
| SH-277S-20-FC | 1x 100M dual-fiber FC optical port (20KM, 1310nm) to 1x RS-485/232/422 adaptive interface (3-in-1) | Desktop |
| SH-277S-20-ST | 1x 100M dual-fiber ST optical port (20KM, 1310nm) to 1x RS-485/232/422 adaptive interface (3-in-1) | Desktop |
| SH-S277-20A/B-SC | 1x 100M single-fiber SC optical port (20KM, 1310/1550nm) to 1x RS-485/232/422 adaptive interface (3-in-1) | Desktop |
| SH-S277-20A/B-FC | 1x 100M single-fiber FC optical port (20KM, 1310/1550nm) to 1x RS-485/232/422 adaptive interface (3-in-1) | Desktop |
| SH-S277-20A/B-ST | 1x 100M single-fiber ST optical port (20KM, 1310/1550nm) to 1x RS-485/232/422 adaptive interface (3-in-1) | Desktop |
Technical Specifications
| Category | Parameter | Specification |
|---|---|---|
| RS-232 Interface Characteristics | Standard | Three-wire interface with ±15KV ESD protection |
| Maximum Baud Rate | 115.2Kbps | |
| RS-485/422 Interface Characteristics | Port Technology | Adaptive technology (auto baud rate adjustment) |
| Protection | ±15KV ESD and 600W surge protection per line | |
| Polling Support | Up to 32-point environments | |
| Asynchronous Transmission | Maximum Baud Rate | 460Kbps (point-to-point) |
| Wavelength | Multimode | 1310nm |
| Singlemode | 1310nm and 1550nm | |
| Transmission Distance | Multimode | 4 kilometers |
| Singlemode | 20 kilometers | |
| Optical Fiber Interfaces | Standard | ST-type (SC/FC optional) |
| Electrical Interfaces | RS-232 | Terminal block connector |
| RS-485/422 | Terminal block connector | |
| Power Supply | Input Voltage | DC9-48V |
| Current | ≤200mA | |
| Interface | 1×5.5×2.5mm DC socket | |
| Environmental Specifications | Operating Temperature | -10℃ to +65℃ |
| Operating Humidity | 5%-90% (non-condensing) | |
| Storage Temperature | -40℃ to +75℃ | |
| Storage Humidity | 5%-95% (non-condensing) | |
| Indicator Lights | PWR | Power indicator |
| TXD | Optical data transmission indicator | |
| RXD | Optical data reception indicator | |
| MTBF | Parameter | 500,000 hours |
Terminal Block Pin Assignment
| Terminal Block (PIN) | Signal Definition | RS-422 Full-Duplex Wiring | RS-485 Half-Duplex Wiring |
|---|---|---|---|
| 1 | T/R+ | Transmit (A+) | RS-485 (A+) |
| 2 | T/R- | Transmit (B-) | RS-485 (B-) |
| 3 | RXD+ | Receive (A+) | Empty |
| 4 | RXD- | Receive (B-) | Empty |
| 5 | TXD | RS-232 (Transmit) | – |
| 6 | RXD | RS-232 (Receive) | – |
| 7 | GND | RS-232 (Ground) | – |
| 8 | VCC | Power Input (DC9-48V) | – |
| 9 | GND | Ground | – |
| 10 | ETH | Earth Ground | – |
