# Logic level converter module, with optocoupler, 4 channels, PC817, 3.3-30V

> Logic level converter module with PC817 optocoupler, 4 independent channels, each with status LED and jumper for common ground or full isolation. Input voltage 3.3-24VDC, controlled output voltage 3.3-30VDC, maximum frequency 4KHz per channel, maximum current 50mA. Dimensions 48 x 38mm. Compatible with Arduino and other development boards, used for isolated control of relays and digital inputs.

- Page: https://sigmanortec.ro/en/logic-level-converter-module-with-optocoupler-4-channels-pc817-33-30v
- Price: 10.85 RON
- Availability: In stock; 1-2 zile
- Reference: 9566 · EAN: 5940106562659
- Category: Mechatronics and IoT > Adapters and Converters > Interface and Logic Level Converters
- Specifications: Supply Voltage: 3.3 VDC; Maximum Input Voltage: 30 VDC; Input Voltage Type: “DC” in Romanian can mean **“de ce”**, which translates to **“why”** in English.
- Package (shipping data): 0.016 kg
- Updated: 2026-09-14
- Shop: [Sigmanortec.ro](https://sigmanortec.ro/en/llms.txt)
- Prices: RON, VAT included; prices and stock as of 2026-10-22 01:33 (Europe/Bucharest)

## Description

Logic level converter with PC817 optocoupler, ideal for isolated control of relays and digital inputs in Arduino or other boards, reducing the influence of electrical noise on the microcontroller. Offers 4 independent channels with status LED, accepts 3.3-24V input and 3.3-30V output, and the jumper on each channel allows the choice between common ground or complete isolation. Operating frequency up to 4kHz.
Logic level converter module, with optocoupler, compatible with Arduino and other development boards. The optocoupler separates two circuits by using light to transmit information. in the optocoupler there is an emitting diode and a phototransistor, isolated from the outside environment. Upon receiving light from the diode, the phototransistor is stimulated.
This type of optocoupler converter is used when it is desired to control some devices in isolation from the microcontroller due to the electrical noise produced by these devices, which can affect the processor and alter the transmitted information.
The maximum current supported by this module does not exceed 50mA, which is why it is necessary to use transistors if you want to control devices such as lights or motors.
Each of the 4 channels are totally independent from each other, for this reason they can be used with totally separate specifications.
There is a Jumper for each individual channel. If it is connected, input GND and output GND are connected. If it is removed, the two GNDs are completely isolated.
The limit frequency of this module is 4KHz.
Specifications:
Input voltage: 3.3 - 24VDC
Controlled output voltage: 3.3 - 30VDC
Jumper connected: "High Potential" output
Jumper not connected: Output "Low Potential"
Optocoupler: 817
Number of channels: 4
isolation: Optoisolation
LED status indicator: Yes, one LED per channel
Maximum frequency per channel: 4KHz
Dimensions mm: 48 x 38mm
LED connection example: