Fisher DPR900 User Manual page 33

2.12
1
sensor
PT I Potential
t
f Groundino Ponnihilitv
1 -1ov
Not permitted, Max CMV is -5 V
2 -5 v Permitted
3
ov Permitted
4 +38
V
Not permitted, Max CMV is +24 V
The figure depicts a current loop example for a DPRSOO controller.
In this example, it is assumed that all units are isolated from the
main power supply ground. This type of current loop must always be
grounded at a single point so that a floating ground does not occur
and introduce a large interference potential.
Installing the Mounting Cassette
To fit the mounting cassette into the panel cutout:
q
Position the mounting cassette (without the controller inserted)
in the panel cutout as shown.
q
Position the lower retaining spring as shown. Hold the
mounting cassette in place with the thumb and use the index
finger to press the spring down.
o Insert the upper retaining spring, as shown on the next page,
to complete the installation.
Change 2 -July 1992 uM6.1:DPR900:9147