Wave 2 Channel RS485 for Pi
This is a 2-channel isolated RS485 expansion HAT designed for Raspberry Pi, adopts the SC16IS752+SP3485 solution, with embedded protection circuits such as power supply isolation, ADI magnetical isolation, and TVS diode, etc.
It is easy to control the 2-channel RS485 for auto transceiving via SPI interface. Due to its fast communication, stability, reliability, and safety, it is an ideal choice for fields like industrial automation.
Quick Spec
- UART Expansion Chip: SC16IS752
- RS485 Transceiver: SP3485
- Communication Interface: SPI
- Data Rate: 300 ~ 921600 bps
- Operating Voltage: 3.3V / 5V
- Dimensions: 65 × 56.5mm
- Mounting Hole Size: 3.0mm
- Weight: 29g
Board Layout
- SC16IS752 UART expansion chip
- ADUM1412 digital isolator
- PC817 optocoupler
- SP3485 RS485 transceiver
- B0505LS power supply isolation module
- RT9193-33 power chip
- SMAJ12CA transient suppress diode array
- Auto-recovery fuse
- Status indicator
- PWR: power indicator
- RXD/TXD: UART transceiving indicator
- Raspberry Pi GPIO connector: for connecting Raspberry Pi
- RS485 terminal
- MCU control header: for connecting host control boards like Arduino
- 120Ω terminal resistor switch
- Interrupt pin switch
- Operating mode selection
- Half-auto: A=0, B=1
- Full-auto: A=1, B=0
Pinout
| PIN | RASPBERRY PI (BCM) | DESCRIPTION |
|---|---|---|
| VCC | 5V | 3.3V/5V power supply |
| GND | GND | Ground |
| SCK | P21 (SPI1 SCLK) | SPI clock input |
| MOSI | P20 (SPI1 MOSI) | SPI data input |
| MISO | P19 (SPI1 MISO) | SPI data output |
| CS | P18 (SPI1 CS) | SPI chip select |
| IRQ | P24 | Interrupt output |
| EN1 | P27 | Channel 1 TX/RX enable: high for TX, low for RX |
| EN2 | P22 | Channel 2 TX/RX enable: high for TX, low for RX |
Resources
Shipping List
- 1 x 2-CH RS485 HAT
- 1 x 2x20PIN female pinheader
- 1 x RPi screws pack (2pcs)
Wave 2 Channel RS485 for Pi
- Brand: Waveshare
- Product Code: W17221
- Product Status : Active
Stock
| Warehouse | Stock Status | Location |
|---|---|---|
| Centurion | No Stock | |
| Stellenbosch | No Stock |
We ship free of charge between branches to complete your order.
-
R298.00 (Inc Tax: R342.70)
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Tags: wave, 2 channel, dual channel, rs485, hat, pi, raspberry pi, rasp, pi hat