Our PWM to 0-10V analog converters provide full optical isolation between channels and controller. They are suitable to control up to 3 Variable Frequency Drives from a controller with PWM outputs (TTL).
Features:
– Adjustable output level
– Optical isolation
– Independent channels
– Through hole components
– Socket mounted ICs
– Sturdy construction
– Fits in standard DIN rail enclosure (not supplied)
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.
Our boards provided the adequate isolation and level conversion to control the speed of three separate motors safely and precisely.
They require a 24Vdc power supply and delivers and output level adjustable between 5V and 12V at full scale, making it directly compatible with most comercial drives.
Each channel is totally independent and optically isolated from the others 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.
Our PWM to analog boars are 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.
See our online store for more details an documentation: https://tutanautomation.com/shop/