The all new RS485 interface for the Raspberry PI is here! The GPIO expansion port is duplicated on either side of the module, so more modules can be added. The RS485 signals are duplicated on terminal blocks as well as RJ45 connectors.
The footprint matches the new RPi 3, and with the optional mounting hardware, it's a perfect fit on the back of the Pi. A lot of our product uses RS485 Modbus RTU protocol, and the Pi-SPi-RS485 is a perfect fit!
Port Pins Used:
TX (GPIO14) RX (GPIO15) DIR_RS485 (GPIO25)
Identical foot print to the RPi 3
Separate field power input (9-24VDC) for remote transmitters
Each module has its own 3.3VDC LDO regulator operating from the 5VDC bus
No loading on the RPi 3.3VDC bus
Dual terminal blocks for RS485
Dual RJ45 connectors for RS485, power over Cat5e to remote devices
LED indicators for power, RS485
Dual GPIO connectors (left and right)
RS485 Chip Industry standard TI part SN65HVD72DR with IEC ESD Protection
Alternate Driver IC's can be used in the DIP space provided (SMD RS485 removed)
Jumper selectable 120 Ohm Termination resistor
Available in kit form (all SMD parts already installed) or fully assembled and factory tested.