Pi-SPi-DIN-RTC-RS485 Raspberry Pi I/O Module

This Raspberry Pi I/O Module industrial "Hardened" interface from VP Process Inc. supports the Raspberry Pi 3 and 4 and provides 3 convenient mounting methods:

PCB - Revision E (Current Release)

PCB Revision B

DIN Rail Mounting Clips

DIN Rail Enclosure - Black (Standard)

DIN Rail Enclosure - Blue (Custom)

DIN Rail Enclosure - White (Custom)

Each mounting version comes complete with all hardware and connecting ribbon cables - just add your Raspberry Pi and and your power supply!

The four major features of the interface are:

• 9 to 24 VDC Power Input
• 5VDC @ 2.5 A Power Supply
• Real Time Clock (I2C Interface + Battery Backup CR2032)
• RS4585 with EMI protected driver

This interface supports all peripherals using the standard GPIO pins (26 Pin) such the Pi-SPi series, as well as the new PI-SPI-DIN interface modules.

Specifications:

• Power Input: 9 to 24 VDC (28 VDC Max)
• Power Input: Barrel Plug or Terminal Block
• Blue LED Power Indicator
• 5VDC @ 2.5A (Max 3Amp) Power Supply
• Power To Raspberry Pi module supplied via GPIO Ribbon Cable (26 Pin)
• RS485 Output via RJ45 connector and Terminal Block
• RS485 uses GPIO Uart and 1 GPIO pin for direction control
• RS485 can be disconnected via jumpers
• Local RS485 Termination resistor - Enabled via jumper
• RS485 Tx/Rx LED Indicators
• 2 GPIO connectors - 1 internal for Raspberry Pi, 1 external for peripherals
• 1 PI-SPI-DIN connector (16 Pin) for PI-SPI-DIN series (power, SPI, I2C and 5 Chip Enables)
• Real Time Clock (I2C) Microchip MCP7940
• Battery Coin Cell Holder for CR2032 battery (Included)
• PCB Dimensions: 4" Wide x 3.4" High
• Terminal blocks are rising cage clamp style
• Complete factory test

NOTE: Rasoberry Pi Module NOT Included

Node-RED

The PI-SPI-DIN Series now has Node-RED support. Please visit

Node-RED and the PI-SPI-DIN Series

for instructions.

Contact us for more information or custom configurations. All designs, engineering and manufacturing are done at our factory, Kelowna, British Columbia, Canada.

PI-SPI-DIN GPIO Connector Pinout

The PI-SPI-DIN Series of peripheral modules are designed to "Daisy Chain" from the main PI-SPI-DIN-RTC-RS485 module.

Three modules rely on the SPI buss - the 8AI, 8DI and 4KO modules.
- the 8DI and 4KO modules use a GPIO expander chip (MCP23S08) as described above
- the 4AO 4-20mA analog output module uses the I2C buss and the DAC used (MCP4728) can be programmed for different I2C addresses

A typical daisy chained system maxing out the hardware provided chip selects (without "hacking" the boards to use other GPIO pins as chip selects) would be as follows:

3 x PI-SPI-DIN-8AI modules for a total of 24 x 4-20 mA Inputs (GPIO7, GPIO23 and GPIO18)

4 x PI-SPI-DIN-4AO modules for a total of 16 x 4-20 mA Outputs (I2C bus)

4 x PI-SPI-DIN-4KO modules for a total of 16 SPDT 2A Contact Relays (GPIO8 and 4 Jumper selectable addresses on the modules A0 thru A3)

4 x PI-SPI-DIN-8DI modules for a total of 32 Isolated Digital inputs (GPIO24 and 4 Jumper selectable addresses on the modules A0 thru A3)

That is 15 modules for a total of 88 I/O points, all powered form the main module.

Downloads

PI-PSI-DIN-RTC-RS485 Schematic

PI-SPI-DIN-RTC-RS485 PCB Layout

Real Time Clock Using the MCP7940 for the Raspberry Pi

For Python Sample Code, please visit:

PI-SPI-DIN Applications

SaveSaveSaveSaveSaveSaveSaveSaveSaveSaveSaveSaveSave