Characteristics - WEST PAM-195-P-PVG Technical Documentation Manual

2 Characteristics

This module is used for the control of a directional valve with two solenoids. Various adjustable parameters
allow an optimized adaptation to the respective valve. The integrated power amplifier with a short cycle time of
0,125 ms for the current loop is an inexpensive and space-saving solution.
Setpoint setting is realized via a ratiometric input. That means the command signal is provided as precentral
value relating to the supply voltage. For that the relevant voltage is measured at a separate input. Via another
input the command value is set by a signal between 25% and 75% of the supply voltage with 50% as zero po-
sition.
The output current is closed loop controlled and therefore independent from the power supply and the solenoid
resistance. The output stage is monitored for cable breakdown, is short circuit proof and disables the power
stage in case of an error.
RAMP, MIN and MAX, the DITHER (frequency and amplitude) and the PWM frequency are programmable.
In addition, the valve characteristics can be linearized via 10 XY-points. For example: using pressure valves a
linear behavior between input signal and pressure can be reached.
Typical applications: Control with ratiometric joysticks (Danfoss compatible control).
Features

Control of directional valves

Compact housing

Digital reproducible adjustments

Ratiometric command value input

Separate reference input for the ratiometric command input

Characteristics linearization via 10 XY-points per direction

Free parameterization of RAMPS, MIN und MAX, output current, DITHER (frequency, amplitude)

Nominal output current range: 0,5... 2,6 A

Simple and application orientated parameter settings via WPC-software

Failure monitoring and extended function check
Page 6 of 27 PAM-195-P-PVG 18.06.2019