Thanks to this shield, you can now connect your MKR board to any of the industrial systems that using the RS 485 protocol.
The MKR 485 shield is the ultimate expansion that allows MKR boards to connect to almost any legacy industrial system, such as industrial PLCs, controllers, drives and HMIs. Old industrial systems (e.g., machinery, heating systems, and conveyors) can to turned into IoT devices through a serial connection using the MKR 485.
The shield is based on the MAXIM MAX3157 ( Datasheet ) and provides Half / Full Duplex .
Standard operational mode: Half Duplex
|Circuit Operating Voltage||3.3 V|
|Transceiver||MAXIM MAX3157 (datasheet)|
|Buck converter||Texas Instruments TPS54232 (datasheet)|
|Vin (screw connector)||7 V - 24 V|
|Vin (header)||5 V|
|Switchable onboard termination resistor|
|Operating mode||Isolated Half / full duplex (switchable)|
The Arduino MKR 485 Sheld is open-source hardware! You can build your own board using the following files:EAGLE FILES IN .ZIP SCHEMATICS IN .PDF