The module is fully considered the 485 mine design and anti-jamming design, in the field of long-distance transmission, it will block the “earthed” side to earth, can play the role of a good anti-jamming and lightning protection, make 485 more secure; you cannot connect with the earth indoor short-distance transmission. Using a typical 2.54 pitch design for simple secondary development.
Having a 120 ohm termination resistor that shorted R0 to enable matching resistor, when long-distance transmission is advised shorting. Support multi-machine communication, providing access to up to 128 machines on the bus. The module is hot-swappable, and hot-swap does not cause the deadbolt phenomena that occur with other 485 chips. A huge region of copper to prevent signal interference.
FEATURES
- 3.3V perfectly compatible with 5.0V power supply
- 3.3V and 5.0V signals are perfectly compatible
- Working temperature range: -40 ℃ to + 85 ℃
- Transmission distance up to kilometers (with 850 meters of 2 * 1.5 cable to do the test, it is recommended to use in the 800 meters, more than 800 meters, please add repeaters)
- Semi-hole process design, a thickness of 0.8mm, makes it easy to use as a combo board, it can also be welded terminal use
- Has RXD, and TXD signal lights to observe the send and receive status
- Communication method: Half duplex
SPECIFICATIONS
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- Operating voltage: 5V
- A low power consumption for the RS-485 communication
- Slew-rate limited transceiver
- 5.08mm pitch 2P terminal
- Convenient RS-485 communication wiring
- All pins of the chip have been led to can be controlled through the microcontroller
- Board size: 43 x 15 mm
DOCUMENT
SHIPPING LIST
- 1 x TTL to RS485 Module, 485 to Serial UART
