10
5.2 External Wiring
(1) Wiring procedure
1) For wiring, set a relay terminal block.
2) Connect the thermocouple and the compensation
conductors to the relay terminal block.
3) When setting the Q68TD-G-H01 to "With cold junction
temperature compensation", connect the cold junction
temperature compensation resistor (RTD), which is
supplied with Q68TD-G-H01, to the relay terminal block.
4) Use A6CON4 to wire between the relay terminal block and
Q68TD-G-H01.
Figure 5.1 Wiring procedure
POINT
The Q68TD-G-H01 needs to be powered for 30 minutes warm-up in order to
satisfy with the accuracy.
Moreover, the Q68TD-G-H01 needs to be powered for 30 minutes warm-up
when the offset/gain setting is performed and after the online module
replacement is performed.
+
-
+
-
+
G
-
+
-
CH1
+
-
CH8
+
G
-
RTD
A1
B1
A15
B15
A20
B19
B20
Q68TD-G-H01
Cable(*1)
RTD
CH1
CH8
RTD
Compensation
conductors
(*2)
(*4)
(*3)
Relay
terminal block
Connector
(A6CON4)
Modulator
Demodulator
Modulator
Demodulator
Filter
Input amplifer
*1 Always use shielded cable.
In addition, always ground the shield.
*2 Always use shielded compensation conductors.
In addition always ground the shield.
*3 When setting the Q68TD-G-H02 to "With cold junction temperature compensation",
always connect the cold junction temperature compensation resistor (RTD).
*4 When connecting the RTD, always connect the terminals between RTD- and RTD G.
