3 Independent Channel PWM (TTL) to 0-10v analog converter with low ripple and full optical isolationDesigned by TUTAN in Canada
DESCRIPTION This board is a variation of the PWM3B with an improved linearity, low output impedance and low ripple thanks to the use of a -12dB/Octave low pass active filter in the output stage. Puls…Read More…
This board is a variation of the PWM3B with an improved linearity, low output impedance and low ripple thanks to the use of a -12dB/Octave low pass active filter in the output stage.
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 up to 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 15V at full scale, making it directly compatible with most commercial drives. When using drives that only provide +10V auxiliar power it is possible to use the board by reducing the output level to 5v or 6V and adjusting the drive input to this range.
Each channel is totally independent and optically isolated from the other and the controller.
The board is fitted with standard 0.2″ terminal boards and can be housed in a commercial plastic enclosure with DIN rail mounting (optional) 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.
You may purchase the bare board option and get the enclosure via distributors or online:
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