7
5. WIRING
5.1 Wiring Instructions
(1) Use separate cables for the AC control circuit and Q64TCTT(BW)'s external
input signals to avoid the influence of AC side surges and inductions.
(2) Do not run the module cables near, or bundle them with, the main circuit
and high-voltage cables and the load cables from other than the PLC.
Always place the temperature sensors more than 100mm (3.94inch) away
from the main circuit cables and AC control circuit. Fully keep the sensors
away from high-voltage cables and circuits which include high frequencies,
e.g. inverter's main load circuit.
Not doing so can make the sensors more susceptible to noises, surges and
inductions.
(3) Earth the shielded wire or shielded cable to FG of the PLC.
However, depending on the external noise conditions, external earthing
may be recommended.
5.2 External Wiring
(1) When using Q64TCTT
L1
L2
L4
COM
DC24V
R
In
te
rn
a
l circu
it
Q64TCTT
Controlled
object
CH1
CH1
CH2
CH4
CH2
CH4
Fi
lte
r
Fi
lte
r
Fi
lte
r
In
te
rn
a
l circuit
* : Always use shielded wires for cables.
