|
Description
The G438 is a DIN rail mount,
potentiometer input signal condi-
tioner with 1800VDC isolation
between input, output and power.
The input provides a constant
voltage and is designed to accept
any three-wire potentiometer
from 100 Ohms to 100K Ohms.
The field configurable output
is switch selectable providing
either a 0-5V, 0-10V, 0-1mA,
0-20mA or 4-20mA DC signal.
Wide
ranging precision zero and span
pots used in conjunction with
DIP switches allow 80% adjustablity
of offset and gain to transmit
a fullscale output from any
20% portion of the potenti-
ometer input.
|
 |
Application
The G438 is useful in transmitting
process control setpoints to
remote PID controllers or interfacing
position sensors to data acquisition
and control systems. The high
density DIN rail mounting offers
an extremely compact solution
for saving valu- able panel
space.
In
a valve positioning application
a potentiometer is sometimes
used as a feedback signal. Quite
often a wide open valve is only
a 25% turn of the feedback potentiometer.
In a case such as this, the
G438 can easily be adjusted
with the zero and span to provide
a fullscale output signal (e.g.
4-20mA) representing 0-25% or
even 50-75% of the potentiometer
input.
|
