KamodRPI Pico Safe Relay

Description

KamodRPI Pico Safe Relay is a module in the form of a shield for Raspberry Pi Pico equipped with four electromagnetic relays with an additional galvanic barrier based on optocouplers and an isolated DC/DC converter powering the relay coils. The board also includes four digital inputs with optocouplers, a set of LEDs signaling the states of inputs and outputs, a RESET button, and a supply voltage indicator. The module will find applications in building automation (including smart home applications), robotics, industrial automation, measurement systems, laboratory installations, and teaching.

Basic features and parameters

Outputs

• 4x SPDT relay outputs
• Contact load capacity:
  • 3 A / 250 V (AC),
  • 3 A / 30 V (DC),
  • maximum switched current: 10 A.
• Contact resistance: 100 mΩ @ 1 A / 6 V (DC)
• On time: 8 ms (max.)
• Off time: 5 ms (max.)
• Galvanic isolation of coils: LTV-357T optocouplers
• LEDs indicating relay on state
• Screw terminals 3.81 mm (separable)

Inputs

• 4x optoisolated inputs (LTV-357T optocouplers),
• Input voltage - active state: 5 V (4.5...9 V) DC
• LEDs indicating input status
• 3.81 mm screw connectors (detachable)

Other

• Power supply: 5 V / 400mA (min.)
• Automatic selection of power source: micro USB (RPi Pico) or USB C (J4)*
• LED indicating the presence of power supply voltage
• Built-in RESET button
• All RPi Pico lines led out to 2.54 mm (100 mil) pin connectors
• PCB dimensions: 93 x 89 mm

* It is recommended to connect only one of the USB cables at a time