PI-SPI-DIN-4KO Raspberry Pi DIN Rail Relay Output Interface
This is the DIN rail mountable version of the Pi-Spi-8KO Relay Output Interface.
The PI-SPI-DIN-4KO has 4 SPDT Relays with a 2 AAC Rating. The relay coil is 5VDC and is independent of the input power supply used.
The design is based on the Microchip MCP23S08 IO Expander. Each MCP23S08 has 4 addresses using the same SPI Chip Select line, meaning 4 modules (16 Relays) can be used simultaneously.
Each module in the PI-SPI-DIN series has two 16 Pin GPIO ports that carry power, SPI, I2C and 5 Chip Selects from the main PI-SPI-DIN-RTC-RS485 Module. Also, each module has it's own 5VDC switching power supply and 3.3VDC LDO regulator.
Two 16 Pin GPIO Ports (Power, SPI, I2C and 5 Chip Selects)
5 VDC 0.5A Switching Power Supply (9 to 24 VDC Input)
3.3VDC LDO regulator
Terminal Blocks are rising clamp cage screw type (no leaf springs)
Blue LED indicators for power
MCP23S08 I/O Expander with 4 Address Selects
Red LED ON Indicators for each Relay Output
PCB Dimensions: 2.7" Wide x 3.42" Long
Each PI-SPI-DIN module has three mounting styles available:
PCB on DIN rail mounting clips
Dimensions: 3.51" Long x 2.975" Wide x 1.11" High
DIN rail enclosures are available in three colours: Black (Standard), Blue (Custom), and White (Custom). Enclosures are fabricated using PETG Plastic.
PI-SPI-DIN-8DI Accessories :
All PI-SPI-DIN Interfaces come complete with interconnect ribbon cables and all necessary hardware based on enclosure style.
Typical Application with pcb DIN clip mounting:
The PI-SPI-DIN Series has Node-RED support. Please visit