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4-Wire Current Transmitter
4-20 mA Output
Application Notes
4.50
3.50
.50
4.68
2.68
1.70
2.37
1.97
28
24
20
16
4.12
#6-32 TERMINALS
.23
RANGE SWITCH
12
#8-32 TERMINALS
4 PLACES
.44 TYP.
2.13
4 PLACES
8
A C A C
DIA.
AC AC +
-
4
25
50
75
100
Case Style 2
.06
4.88
4.50
.94 DIA.
Case Style 1
0 to 1000 ohms
PERCENTAGE FULL-SCALE (FS)
CONTROL CURRENT OUT
VS
FULL-SCALE INPUT CURRENT
120 ± 10%
+
—
Vac
I PRIMARY
-
INTERCONNECT
RESISTANCE
I CONTROL
INSTRUMENTATION
RESISTANCE
I CONTROL
I PRIMARY
FS
X 16 + 4
FS = FULL-SCALE CURRENT IN AMPS RMS
I PRIMARY = MONITORED CURRENT IN AMPS RMS
I CONTROL = LOOP CURRENT IN mA dc
in (mm)
Typical Applications
An external current transformer may be used with the transmitter by
routing the secondary leads through the window opening. Use the
CR4340-5 current transmitter when using 5-Amp secondary instrument
grade current transformer. For additional details on current transformers,
see page 22.
The scaling factor may be changed by threading the primary current-
carrying wire several times through the window opening. The "actual"
measurement range will be the name plate range divided by the number
of wire passes. For example, the CR4340-30 has the name plate range
of 0-30 ACA. Two passes of the wire through the window opening will
then provide an effective range of 0-15 ACA (30÷2).
CR Magnetics, Inc. 544 Axminister Dr. Fenton MO USA 63026 V: 636.343.8518 F: 636.343.5119
Web: http://www.crmagnetics.com
11
Email: sales@crmagnetics.com
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