RBOARD (Itead IM120618001) Arduino board 4Ch. isolated relays, XBee, ATMega328

Rboard is a unique Arduino board which features 4 channels isolated relays, an XBee socket, and an ATMega328. This board will add relay control as well as wireless connectivity to your projects. It’s great for anything from home automation to robot control. The possibilities are endless!

Features

• 4 optocoupler isolated channels
• 4 mechanical relays with status indicator LED
• Both “NC” and “NO” ports for each relay
• ATMega328P with XBee interface headers, Micro SD socket
• With Arduino Duemilanove bootloader

Hardware

Pin of Arduino	Description
D0	RxD
D1	TxD
D2	XBee Reset
D3	nRF24L01+_IRQ
D4	Relay 0
D5	Relay 1
D6	Relay 2
D7	Relay 3
D8	nRF24L01+_CE
D9	nRF24L01+_CS
D10	SD_CS
D11	SPI_MOSI
D12	SPI_MISO
D13	SPI_SCK
A0	AD0
A1	AD1
A2	AD2
A3	AD3
A4	AD4/IIC_SCL
A5	AD5/IIC_SDA

PWR_EXT Setting

Rboard is designed for isolating industrial application with external power supply.  So when remove the jumpers on PWR_EXT, use the DC 7-20 terminal to for ATMega328 and all digital circuit power supply, and supply the 5V relay by the PWR_EXT terminal with 5V, there are 2 completely isolated power systems for  controller part and relay part.

If you don't need so stringent electrical isolation, put the jumpers on PWR_EXT, then you don't need an extra power supply, the relays will supply by the DC 7-20 terminal the same as controller part - but there also the opto-isolation between the relay and controller I/Os.

Note

The RBoard does not have a USB con­nec­tion. So you need a USB/Serial adapter - we recommend the Foca FT232RL breakout board.

 Schematic

• SCH_IM120618001_RBoard.pdf
  
  

Datasheet

• DS_IM120618001_RBoard.pdf