DFRobot
4-Channel Level Converter (12V to 3.3V)
This DFRobot 4-channel optocoupler-isolated level converter translates 12V signals down to 3.3V, making it easy to interface industrial sensors and PLC outpu...
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This DFRobot 4-channel optocoupler-isolated level converter translates 12V signals down to 3.3V, making it easy to interface industrial sensors and PLC outputs with Arduino, Raspberry Pi, and other 3.3V microcontrollers. Each channel features photoelectric isolation for reliable signal separation between high and low-voltage circuits.
The module supports common anode, common cathode, and differential signal inputs with PNP output (NPN-to-PNP conversion available). It mounts on standard DIN rails via the included enclosure, making it suitable for panel installations in industrial and automation environments.
Key Features
- 4-Channel Optocoupler Isolation – Photoelectric isolation between input and output for noise-free signal conversion
- 12V to 3.3V Level Shifting – Converts 12V input signals to 3.3V output levels
- PNP Output – NPN-to-PNP signal conversion available
- Multiple Input Modes – Supports common anode, common cathode, and differential signal inputs
- LED Indicators – SMD LEDs show signal status on each channel
- DIN Rail Mounting – Enclosed in a protective shell that fits standard DIN rails
Specifications
- Input Channels – 4
- Isolation Type – Optocoupler
- Input Signal Level – 12V
- Output Signal Level – 3.3V
- Module Supply Voltage – 3.3V
- Output Current – ≤50mA per channel
- Bare Board Dimensions – 45 × 72 × 19mm
- Dimensions with Enclosure – 47 × 87 × 39mm
- Mounting Hole – 3mm
Ideal For
- Interfacing 12V industrial sensors with 3.3V microcontrollers
- PLC signal level conversion
- NPN-to-PNP signal conversion
- Signal isolation between circuits
- Polarity and voltage level conversion
Package Contents
- 1× 4-Channel Level Converter (12V to 3.3V) with enclosure
Jargon buster
Plain-language definitions for the technical terms used above.
- differential signal
- A measurement taken between two input wires rather than between one wire and ground. This matters for precision sensors because it can reduce noise and lets the ADC read very small voltage differences more accurately.
- DIN
- As a pin label, DIN stands for 'data in', the input through which a device receives serial data from a controller, as found on SPI displays, LED drivers and other serial modules. DIN can also refer to the German standards body of that name, as in a round multi-pin DIN connector or DIN-rail mounting.
- DIN rail
- DIN rail is a standard metal mounting rail used inside industrial electrical cabinets. When a product is DIN rail mountable, it can be clipped neatly alongside power supplies, relays and other automation hardware in a panel.
- LED
- A light-emitting diode (LED) is a small electronic component that emits light when current flows through it in the correct direction. Because it only conducts one way, its polarity matters, and a through-hole LED must be soldered the correct way around to light up.
- SMD
- SMD means surface-mount device, a component style designed to be soldered directly onto the surface of a circuit board rather than through holes. SMD parts are compact and mounted flat on the board, which suits smaller and mass-produced designs.
- VCC
- VCC is the positive power-supply connection on a chip or module. Connecting it to the correct supply voltage is needed for the part to power on and helps avoid damaging the electronics.
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Prototyping & Wiring
Supplier page — dfrobot.com
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