FEATURES

Four RELAYS with Status LEDs and NO/NC contacts

Switch loads of up to 8A and 240VAC/24VDC

Four high voltage opto-isolated inputs with status LEDs

Separate connectors for low (3V-24V) and high (48-240V) inputs

Universal inputs reading AC or DC signals

Eight layer stackable to 32 relays and 32 inputs

RS485 port

Raspberry Pi reset push button

Pluggable Connectors 30-16 AWG wires

Command Line

Python Drivers

Node-Red node and examples

DESCRIPTION

FOUR HEAVY DUTY RELAYS PLUS FOUR HIGH VOLTAGE INPUTS FOR RASPBERRY PI

Drive 8A/240VAC loads and read 3V to 240V, AC or DC, opto-isolated inputs for all your Home or Industrial Automation Projects

Perfect add-on to your project when you have to control large number of heavy-duty AC loads and/or you have to read wide range inputs. Stackable to 8 layers, the card can add up to 32 relays to each Raspberry Pi in a very compact form factor. In addition, you can read up to 32 opto-isolated inputs.

Pluggable connectors make the 4-RELAYS card easy to use when multiple cards are stacked up.  All relays have Normal Open and Normal Close contacts and can switch up to 8A/240VAC. 

The optically isolated universal inputs can read AC or DC signals from 3V to 48V. The input connectors have a low voltage port which can read signals between 3V and 24V, and a high voltage port which can read signals between 24V and 48V.

COMPATIBILITY

The card is compatible with all Raspberry Pi versions from Zero to 4. All stacked cards share the I2C bus using only two of the Raspberry Pi’s GPIO pins to manage all eight cards.  This feature leaves the remaining 24 GPIOs available for the user.

POWER REQUIREMENTS

The card needs 5V to operate and can be powered from Raspberry Pi or from it's own 2 pin pluggable connector. The relay coils are also powered from the 5V.  The card draws 10mA with all relays off. Each relay needs about 80 mA to turn on. If power is applied to the 2 pin pluggable connector, no other power supply is needed for the Raspberry Pi.

DOWNLOADS

FOUR RELAYS FOUR INPUTS DOWNLOADS

SOFTWARE

SOFTWARE INTERFACES

You can write your own application using the Command Line or Python Libraries provided. Usage example for the python library can be found in tests.py file on repository. No programming is required if you use the Node-Red nodes we supply. You can drag-and-drop the functional blocks to design your application. Examples are also provided.

ACCESSORIES

DIN-RAIL MOUNTING

The card can be installed parallel on a DIN-Rail using the DIN-Rail Kit Type 1, or perpendicular using the DIN-Rail Kit Type 2.

YOUR KIT

When you purchase the Four Relays Card you will receive the following items:

1. 4-RELAYS ADD-ON HAT FOR RASPBERRY PI

2. MOUNTING HARDWARE

Four M2.5x18mm male-female brass standoffs

Four M2.5x5mm brass screws

Four M2.5 brass nuts

3. TWO JUMPERS 
4. MATING CONNECTOR PLUGS 

QUICK START

Plug your 4-RELAYS 4-INPUTS card on top of your Raspberry Pi and power up the system.

Enable I2C communication on Raspberry Pi using raspi-config.

Install the card software from github.com:

~$ git clone https://github.com/SequentMicrosystems/4rel4in-rpi.git

~$ cd /home/pi/4rel4in-rpi

~/4rel4in-rpi$ sudo make install

~/4rel4in-rpi$ 4rel4in

The program will respond with a list of available commands.