Introduction
Still make do with the hard and thick shielded twisted pair for remote signal-transmitting? And even drop the baud rate again and again just for transmission stability? Now get rid of these problems by using this Gravity: UART Fiber Optic Transceiver Module from DFRobot! With complete electrical isolation for preventing electromagnetic interference, this module runs at 2000000 baud at any time within a distance of up to 10km. Besides, it features lightning protection and can share cable trunking with strong power. Also, users can use it with a passive optical splitter to realize one-to-many star networking. Two transceiver modules for only half the price of shielded twisted pair can provide users with long-distance & interference-free fiber optic communication, good value for money!
Warning
The optical transceiver module emits an invisible infrared laser of 1310nm, but looking directly at the laser will cause damage to the eyes.
Don't look at the laser emitter when powered on, and it is recommended to plug in the fiber before powering on.
Specification
- Supply Voltage: 3.3V ~ 5V
- Signal Voltage: 3.3V ~ 5V
- Maximum Speed: 2000000 baud
- Communication Distance: 10km
- Operating Wavelength: 1310nm
- Fiber Optic Type: Single Mode
- Fiber Optic Interface: SC
- Operating Temperature: 0~70℃
Interface & Pin
Pinout
| Name | Description |
|---|---|
| Gravity: UART | UART interface, connect to MCU or sensor |
| PWR LED | Power indicator, turns ON when powered on |
| SD LED | Indicator for optical fiber disconnection, which lights up when the fiber optic disconnection is detected |
| TX LED | Indicator for fiber optic transmitting, which blinks when transmitting signal |
| RX LED | Indicator for fiber optic receiving, which blinks when receiving signal |
| SC Fiber Optic Interface | Connect to SC fiber optic interface |
SD LED can not show all the fiber disconnections or unstable transmissions. Please use a red pen, optical power meter and other tools to check error when a connection problem occurs.
Tutorial
Hardware Preparation
To build a fiber optic communication system, the following hardwares are required
- TEL0153 Gravity: UART Fiber Optic Transceiver Module x 2
- Single-mode dual-core fiber optic with SC interface
Wiring Instructions
For example, connect the MCU to a long-range sensor using the fiber optic module
Note: The pins TX and RX both in the UART connection of the fiber optic module and a device and the connection between fiber optic modules should be cross-connected, that is, RX to TX and TX to RX, otherwise the data can't be transferred normally.
More Documents
FAQ
For any questions, advice or cool ideas to share, please visit the DFRobot Forum.