103
CHAPTER 6 INSTALLATION AND WIRING
6
6.
6
W
iring of
E
xte
rnal Dev
ic
e
s
and T
e
rm
inal
Bloc
ks
(2) In the temperature control mode
(a) In the standard control
*1
Be sure to use the shielded compensation lead wire.
*2
Be sure to use the shielded cable.
Use the compensation lead wire for the cable of the thermocouple. If the compensation lead wire is not used, and when the
cold junction temperature compensation resistor is away from the end tip of thermocouple, the (ambient) temperature
difference may lead to a faulty temperature process value (PV).
L1
L2
L4
COM-
24VDC
CH1+
CH1-
CH2+
CH2-
CH4+
CH4-
Object to
be
controlled
Filter
Filter
Filter
Internal
circuit
Internal
circuit
Internal
circuit
*1
*1
*2
*2
NZ2GF2B-60TCTT4
NZ2GF2B-60TCTT4
Reference junction
Compensation lead wire (OK)
Shielded cable (NG)
Cold junction temperature
compensation resistor
(Ambient) temperature difference
Terminal block
A: Reference junction of the
thermocouple
B: Cold junction temperature
compensation resistor
A
B
Содержание NZ2GF2B-60TCRT4
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