PWM1B – Isolated 1 Channel PWM to Analog Converter – Rev.4

$27.00 – $35.00

This board houses one PWM* to 0-10V analog converter with full optical isolation between input and output sections. Suitable to control 1 proportional actuator, such as VFD** from a controller with PWM outputs (3.3, 5 or 12V).

Features

  • Input level selectable
  • Adjustable output level
  • Optical isolation
  • Through hole components
  • Socket mounted ICs
  • Sturdy construction
  • Fits in standard DIN rail enclosure (optional)

*PWM – Pulse Width Modulation
**VFD – Variable Frequency Drive

SKU: A001 Categories: ,

Description

This product contains one PWM (Pulse Width Modulation) to Analog converter that provides an output voltage proportional to the  DC (Duty Cycle) of the  input signal. The intended application is to provide a galvanically isolated analog signal to control proportional actuators, such as VFDs (Variable Frequency Drives), linear actuators. proportional valves and other similar devices.

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.

The input selector allows  3.3, 5 or 12 V and  a trimpot provides adjustable 0 to 10V outputs (see specs below), which is a common standard for many industrial actuators.

When the actuator (i.e. VFD) provides its own “wetting” voltage (typically 10V), the converter can be powered directly from this supply bypassing the internal regulator. With 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″ terminals and is available in two options:  With or without enclosure. The enclosure can be mounted in a standard DIN rail for easy integration in electrical cabinets. Alternatively you may order the enclosures directly from one of the suppliers listed below.

For two or three channels use the models PWM2B or PWM3B.

Specifications

  • Number of channels: 1
  • PWM input:    Selectable 3.3, 5 or 12V, Max frequency 1 KHz
  • Output: Adjustable 0 to 5..12V
  • Linearity: 2% FSD
  • Isolation: Min. 500 Vac
  • Power: Nominal 24 Vdc  (Acceptable range 17 to 30Vdc)
  • Dimensions: 3.400 x 2.700 in. (87 x 69 mm)
  • Weight: 1.7 oz (0.055 Kg)

Documentation

  • Instructions: PWM1B Instructions

Enclosures

Lead time

Back orders ship usually in 2 weeks.

Additional information

Weight 150 kg
Dimensions 20 × 15 × 10 cm
OPTIONS

BARE BOARD, DIN RAIL ENCLOSURE

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