PR159 module in DIN rail enclosure, front three-quarter view: four blue trimmers, fuse and screw terminals

PWM valve driver with slow ramp-up and ramp-down, potentiometer control, two outputs

Article number PR159s01

The PR159s01 drives two high-side switched PWM outputs of approximately 225 Hz; the duty cycle follows the position of an external potentiometer of 1 to 100 kΩ. A voltage of 5 to 30 V on IN1 switches on output 1, on IN3 output 2. The isolated 5 V output on A1 and A5 supplies the potentiometer and the inputs, so no extra supply is needed. V-max sets the maximum duty cycle (50 to 100 %), V-start the minimum (0 to 50 %), and Ramp-up and Ramp-down the rise and fall rate.

Supply 18 to 30 V DC
Input potentiometer 1 kΩ to 100 kΩ on A1, A3 and A5 (IN2, 5 V max.); IN1 (A2) and IN3 (A4) switch on output 1 and 2 with 5 to 30 V DC
Output two PWM outputs, high-side switched, on B3 and B4 and on B5 and B6; only one active at a time

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Specifications

Specifications
Supply	18 to 30 V DC
Input	Potentiometer 1 kΩ to 100 kΩ on A1, A3 and A5 (IN2, 5 V max.); IN1 (A2) and IN3 (A4) switch on output 1 and 2 with 5 to 30 V DC
Output	Two PWM outputs, high-side switched, on B3 and B4 and on B5 and B6; only one active at a time
Isolation	Input side (A1 to A5) galvanically isolated from outputs and supply (B1 to B6)
Setup	Four trimmers: V-max, V-start, Ramp-up and Ramp-down
Output current	4 A max., both outputs together
PWM frequency	Approx. 225 Hz
Rise and fall rate	Adjustable with the Ramp-up and Ramp-down trimmers
Ambient temperature	0 to 80 °C
Dimensions	45 x 82 mm

Connections

Connections
Terminal	Function
Terminal A1	Isolated 5 V output, potentiometer plus
Terminal A2	IN1: switches on output 1
Terminal A3	IN2: potentiometer signal (wiper)
Terminal A4	IN3: switches on output 2
Terminal A5	0 V of the isolated side, potentiometer minus
Terminal B1	Supply minus
Terminal B2	Supply plus
Terminal B3	Output 1 plus (to the plus of the first load)
Terminal B4	Output 1 minus (to the minus of the first load)
Terminal B5	Output 2 minus (to the minus of the second load)
Terminal B6	Output 2 plus (to the plus of the second load)

Datasheet (PDF)PDF, 156 kB

Setup

Connect the supply to B1 (minus) and B2 (plus), the first load to B3 and B4 and the second load to B5 and B6.
Connect the potentiometer to A1 (plus), A3 (wiper) and A5 (minus).
Connect a switch between A1 (5 V) and IN1 (A2) for output 1, and between A1 and IN3 (A4) for output 2.
Set the maximum duty cycle with V-max (50 to 100 %) and the minimum with V-start (0 to 50 %). Turning clockwise increases the value.
Set the rate at which the output rises with Ramp-up and the rate at which it falls with Ramp-down.

Application

Letting hydraulic valves open and close smoothly with PWM

PR159 series: PWM drivers with two outputs

The modules in the PR159 series drive two high-side switched PWM outputs; only one output is active at a time. The input side (terminals A1 to A5) is galvanically isolated from the outputs and the supply (terminals B1 to B6). Four trimmers on the module (V-max, V-start, Ramp-up and Ramp-down) set the outputs and, on most versions, the ramp rates; turning clockwise increases the value. This lets a hydraulic valve open and close smoothly, for example. The modules run on 18 to 30 V DC, deliver up to 4 A in total and are suitable for 0 to 80 °C; dimensions 45 x 82 mm.

More about the PR159 series