1, 2 or 3 channel PWM (TTL) to 0-10V analog converter with full optical isolation between channels and controllerDesigned by TUTAN in Canada
Pulse width modulation to analogue converter board Most small micro-controllers do not have real D/A converters to produce analog outputs, instead they provide PWM signals that can be converted to ...Read More…
Most small micro-controllers do not have real D/A converters to produce analog outputs, instead they provide PWM signals that can be converted to analog values using an LP filter. This approach is good enough to generate 0-3.3V or 0-5V analog outputs (depending on the logic level of the controller) to control small powered devices, but is not suitable to interface with high power systems, such as VFDs or Servo controllers for electric motors that typically have 0-10V analog inputs and recommend the use of galvanic isolation between the drive and the controller for improved safety.
This board provides the adequate isolation and level conversion to control the speed of two or three separate motors (or other devices) safely and precisely. The board requires a 24Vdc power supply and delivers and output level adjustable between 5V and 12V at full scale, making it directly compatible with most commercial drives. Each channel is totally independent and optically isolated from the other and the controller. When the VFD provides its own “wetting” voltage (typically 10V), the converter can be powered directly from this supply bypassing the internal regulator. In this setting the maximum output voltage is equal to the power supply and no level adjustment is necessary.
The board is fitted with standard 0.2″ terminal boards and can be housed in a commercial plastic enclosure with DIN rail mounting for easy addition to electrical control cabinets.
Each channel is totally independent, therefore they can be connected to different controllers (if required). The same applies for the outputs.
Can be purchased through distributors or online:
FOR 1 CHANNEL VERSION
FOR 2 CHANNELS VERSION
FOR 3 CHANNELS VERSION
The boards are available in 1, 2 or 3 channel versions. All channels are functionally equivalent,
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