462
Temperature Sensor Units Section 7-5
• 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 cor-
rectly.
• Do not touch the cold junction compensator. Doing so may result in incor-
rect temperature measurement.
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
Note (1) When an input is not being used, short the + and – terminals.
(2) Separate wiring from power lines (AC power supply lines, high-voltage
lines, etc.)
(3) 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
To Next Page
Loading...
