RS485 3 click - SN65HVD31 jadaliidese adapter
38-MIKROE-2821
Main info
RS485 3 click uses from , a tri-state differential line driver and differential input line receiver. The click is intended to be used as UART to RS422/RS485 communication interface. It is suited for transmitting smaller blocks of data over long dist RS485 3 click uses from , a tri-state differential line driver and differential input line receiver. The click is intended to be used as UART to RS422/RS485 communication interface. It is suited for transmitting smaller blocks of data over long distances, using the four-wire bus, allowing for full-duplex communication.
It can be used as a transceiver between UART interface and RS422/RS485 communication bus. RS485 3 click can be used for controlling various building automation systems, light controllers, sensors and many small embedded devices that can all share the same bus, which can stretch up to 254 nodes and up to 1200m in length.
How does it work?
The main feature of the RS422/RS485 interface is that the signals can be transmitted and received at distances up to 1200m by using the so-called twisted pairs - basically, the signal and its inverted copy are sent via the twisted pair wires. Because of the length of the twisted pair, it will unavoidably be exposed to the influence of the EMI. The interferences will appear in both wires of the twisted pair equally, but thanks to the opposite polarity of the signals the wires are carrying, the interferences will get canceled at the differential inputs of the SN65HVD31. This way, greater signal communication distances can be achieved than with the regular UART.
RS422/RS485 only specifies electrical characteristics of the transmitter and the receiver. It does not specify or recommend any communications protocol, only the physical layer. The top layer communication protocol of choice can be used, such as the MODBUS or DMX protocols.
To improve the signal stability, RS485 3 click is equipped with the TVS – transient voltage suppression diodes used to protect the circuit from the static electricity discharges and other types of dangerous electrical discharges, that might occur.
There are four onboard screw terminals (RX+, Rx-, Tx+, Tx-) for connecting RS422/RS485 twisted pair cable, along with two screw terminals (GND) for common ground connection.
.jpg)
TX and RX pins should be used for connecting MCU UART interface. Two resistors (R2 and R5) should be unsoldered if using more than two clicks on the RS422/RS485 bus.
Downloads
Dimensions and weights
Product codes
Photopoint offers free shipping for orders over 99 € delivered to Estonia. Take a look in the tab "Delivery" for a more precise delivery estimate.
For this product you can select the desired delivery method at the shopping cart:
Photopoint store Pick-up
Place your order from Photopoint web store and pick your goods up from one of Photopoint`s brick and mortar stores. The delivery to Photopoint store is free even for orders less than 99 €. You will be noticed by e-mail when your order is ready for pick-up.
The Photopoint stores are located in Tallinn and Tartu. See the exact locations from here.
Omniva parcel terminal
You can order the goods to one of the Omniva Parcel terminals. Choose the desired terminal at the shopping cart. As the shipment arrives to the selected terminal, you will be sent an SMS-notification with an unique code. Go to the terminal within a week, enter the code and take your package. It is as simple as that.
See Omniva Parcel terminal locations here.
SmartPOST parcel terminal
Did not find an Omniva terminal at suitable location? Try SmartPost. Choose the desired terminal at the shopping cart. As the shipment arrives to the selected terminal, you will be sent an SMS-notification with an unique code. Go to the terminal within a week, enter the code and take your package. This method actually works for all parcel terminals.
See SmartPOST parcel terminal locations here.
DPD parcel locker
Make sure you check out also the locations of DPD parcel lockers. These are located all over Estonia. The delivery is the same. As the shipment arrives to the selected locker, you will be sent an SMS with a unique code. Go to the locker, enter the code and take your package.
See DPD parcel locker locations here.
Smartpost Finland parcel terminal
SmartPOST Finland is the best way to order goods to Finland. These terminals work the same way as in Estonia. As the shipment arrives to the selected terminal in Finland, you will be sent an SMS-notification with an unique code. Go to the terminal, enter the code and take your package.
See SmartPOST Finland parcel terminal locations here.
Matkahuolto parcel service
Matkahuolto is easy way to order goods to Finland. These are located also in smaller Finnish towns. As the shipment arrives to the selected Matkahuolto outlet, you will be sent an SMS-notification or an e-mail. Go to the outlet, show your ID and take your package.
See Matkahuolto outlet locations here.
Omniva courier delivery
The courier will transport your goods from Photopoint straight to the provided address. The delivery will take place at workdays from 08:00 to 17:00. Hold your phone near you as the courier will call you prior to its arrival. Please make sure there is someone at the destination, eligible to receive the shipment.