1-Channel EL817 Optocoupler 12V

This optocoupler module with the EL817 galvanically isolates an input signal from the microcontroller. It allows inductive and capacitive proximity switches with 12 V, NPN or PNP, to be read by an Arduino or a 3D printer controller, for example as a sensor for automatic bed levelling (ABL). The input is designed for 12 V with resistor R1; for higher voltages, R1 is replaced with a suitable value.

Recommended Accessories:

• LJ12A3-4-Z NPN Inductive Proximity Switch 6-36 V DC
• SN04-N NPN Inductive Proximity Switch 6-36V DC

Features:

• 1 channel with EL817 optocoupler
• Input for 12 V, adaptation to other voltages via R1
• LED indicates when the input is active
• Connection via screw terminals, 2-pin and 3-pin
• 2 mounting holes

Application Examples:

• Retrofitting a capacitive or inductive ABL sensor on 3D printers such as Creality CR-10 or Ender-3
• Reading signals from 12 V sensors on microcontrollers with 5 V or 3.3 V
• Galvanic isolation between control circuit and sensor circuit

Documentation:

• Diagram for capacitive sensor with optocoupler module (Thingiverse)

Technical Data:

• Optocoupler: EL817
• Input voltage: 12 V (with factory-fitted R1)
• Isolation voltage: more than 3000 V
• Input current: at most 50 mA
• Output current: at most 50 mA
• Maximum signal frequency: 80 kHz
• Mounting hole diameter: 3 mm
• Dimensions: 40.3 × 15 × 17 mm
• Weight: 8.5 g

Scope of Delivery:

• 1× 1-Channel EL817 Optocoupler 12V