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8-77
8 Using Expansion Units and Expansion I/O Units
CP1E CPU Unit Hardware User’s Manual(W479)
8-4 T
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S003 Tempe
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Units
Precautions for Correct Use
Precautions for Correct Use
When connecting a thermocouple input, observe the following precautions:
•
Do not remove the cold junction compensator attached at the time of delivery. If the cold junc-
tion compensator is removed, the Unit will not be able to measure temperatures correctly.
•
Each of the input circuits is calibrated with the cold junction compensator attached to the Unit.
If the Unit is used with the cold junction compensator from other Units, the Unit will not be able
to measure temperatures correctly.
•
Do not touch the cold junction compensator. Doing so may result in incorrect temperature
measurement.
(2) Analog Inputs
Last two channels can be used as analog inputs, but two of the analog inputs must be the
same range.
•
Wiring for Analog Inputs
Precautions for Correct Use
Precautions for Correct Use
•
When an input is not being used, short the + and – terminals.
•
Separate wiring from power lines (AC power supply lines, high-voltage lines, etc.)
•
When there is noise in the power supply line, install a noise filter on the input section and the
power supply.
Temperature input 0
LOOP0
−
LOOP0+
NC
LOOP1
−
LOOP1+
NC
I IN2
I IN3
Temperature input 1
LOOP2+
V IN2
LOOP3+
V IN3
LOOP2
−
COM2
LOOP3
−
COM3
Cold junction
compensator
Analog
device
with
voltage
output
Analog
input 2
Analog
input 3
Analog
device
with
current
output
V IN
COM
I IN
V IN
COM
I IN
Analog
device with
voltage
output
Analog
input 2,3
+
−
+
−
Analog
device with
current
output
Analog
input 2,3
FG
2-core shielded
twisted-pair cable
FG
2-core shielded
twisted-pair cable
Summary of Contents for CP1E-E**D Series
Page 3: ......
Page 66: ...2 Basic System Configuration and Devices 2 22 CP1E CPU Unit Hardware User s Manual W479...
Page 318: ...Appendices A 54 CP1E CPU Unit Hardware User s Manual W479...
Page 322: ...Index 4 CP1E CPU Unit Hardware User s Manual W479...
Page 324: ...Revision 2 CP1E CPU Unit Hardware User s Manual W479...
Page 325: ......