Product description
EKM028 is a module designed for simplifying smart home conversion of appliances and machinery or any other application where isolated control over heavy loads is required and the current draw needs to be monitored.
The board contains four high-quality 10A relays from Zettler and isolated, bidirectional current sensing for each relay. The module is designed in the UNO shield form factor and will work with any Arduino UNO compatible board.
To make connecting auxillary devices easier, the board also features two QWIIC connectors for plug-and-play hookup to any I2C modules compatible with the QWIIC ecosystem.
No configuration is required for use with 5V logic level microcontrollers.To use the QWIIC connectors with a 3.3V system, change the IOLEVEL solder jumper from 5V to 3.3V.
Please note that this module is sold as a partially assembled kit.All SMD components are mounted, while relays and connectors are included but unsoldered.
Functions
• 4x Zettler AZ9371T relays
• 5mm pitch screw terminals (0.5-2.5mm²)
• 4x ACS724 Current sensor
• QWIIC connectors for I2C peripherals
• LED indicators for relay status
Specifications
• Supported IO levels: 3.3V / 5V
• Max current draw: 217mA (39mA no relay active)
• Relay specifications: SPST-NO, 277VAC / 10A, 30VDC / 10A
• Current sense range: ±10A ±0.2% (200mV/A)
• Current sense resistance: 1.2mOhm
• Current sense bandwidth: 250kHz
• Dimensions: 68.6 x 53.4 mm