Gravity UART Fiber Optic Transceiver Module

The Gravity UART Fiber Optic Transceiver Module (TEL0153) from DFRobot transmits a UART connection over a single-mode optical fiber with SC connector. The link is completely galvanically isolated and therefore immune to electromagnetic interference. According to DFRobot, the module is protected against lightning effects and the fiber cable may run in the same cable duct as power lines. It transmits up to 2,000,000 baud over a distance of up to 10 km. With a passive optical splitter, a star network can also be built in which one node reaches several others.

Important: A link requires two modules and a single-mode duplex fiber cable with SC connectors. TX and RX are cross-connected, both between module and microcontroller and between the two modules. The module emits invisible infrared laser light at 1310 nm: do not look into the transmitter during operation. DFRobot recommends plugging in the fiber cable before switching on.

Note: The connection cable can be converted to male pins with a Dupont cable M-M, so that it also fits an Arduino UNO.

Recommended Accessories:

• 3m SC-SC Single Mode Duplex Fiber Jumper
• 50m SC-SC Single Mode Duplex Fiber Jumper
• Dupont Cables M-M 10cm 20 Pieces

Features:

• UART over optical fiber, up to 2,000,000 baud
• Range up to 10 km
• Complete galvanic isolation, immune to electromagnetic interference
• Protected against lightning effects according to DFRobot
• Star network possible with a passive optical splitter
• LED indicators PWR, SD, TX and RX
• The SD LED signals an interruption of the fiber, but according to DFRobot does not detect every fault; in case of problems, check with a red light test pen or an optical power meter
• Gravity connector, 3.3 V and 5 V

Application Examples:

• Serial connections over long distances, for example to remote sensors
• Data links next to motors, frequency converters or power lines
• Star network with one master and several nodes
• Galvanically isolated link between two installations

Documentation:

• Wiki DFRobot TEL0153
• Getting started and safety note (DFRobot wiki)
• Wiring example (DFRobot wiki)
• Dimension drawing (PDF)

Technical Data:

• Manufacturer: DFRobot
• Manufacturer SKU: TEL0153
• Supply voltage: 3.3 V to 5 V
• Signal level: 3.3 V to 5 V
• Interface: UART, Gravity 4-pin
• Speed: up to 2,000,000 baud
• Range: up to 10 km
• Wavelength: 1310 nm
• Fiber type: single mode
• Fiber connector: SC
• Operating temperature: 0 °C to 70 °C
• Dimensions: 57.3 × 42 × 12 mm
• Weight: 34 g

Scope of Delivery:

• 1× Gravity UART Fiber Optic Transceiver Module
• 1× Gravity connection cable 4-pin, 30 cm