Chapter 4 Installation and Wiring
4-3
4.2 Wiring
Wiring Precautions
1. For input and output terminals, use single-core cables or twin-core cables in a diameter of 22 AWG–16 AWG with
pin-type connectors smaller than 1.5 mm. Use only copper conducting wires that can resist temperatures above 60°
C-75° C. The required torque for tightening a terminal screw should be less than1.90 kg-cm (1.65 lb-in).
2. For power terminals, use single-core cables or twin-core cables in a diameter of 12 AWG–22 AWG. Use only copper
conducting wires that can resist temperatures above 60° C-75° C. The required torque for tightening a PLC terminal
screw should be less than 5-8 kg-cm (4.3-6.9 lb-in).
3. Do NOT wire empty terminals.
4. To prevent a surge and induction, the cable and the input signal cables that are connected to the TP70P-211LC1T /
TP04P-20EXL1T must be separate cables.
5. Prevent foreign objects, such as oil, water, or metal powder entering TP70P-211LC1T / TP04P-20EXL1T through
the ventilation holes. Prevent drill shavings or other debris entering TP70P-211LC1T / TP04P-20EXL1T.
6. To increase the cooling efficiency, install TP70P-211LC1T / TP04P-20EXL1T with sufficient space between
adjacent objects and walls to prevent poor heat dissipation.
4.2.1 Wiring Power
Use DC power supply for TP70P-211LC1T and TP04P-20EXL1T and note the followings.
1. Connect to the terminal ends 24 VDC and 0 V. The power supplied to TP70P-211LC1T and TP04P-20EXL1T should
be within the range of 20.4 to 28.8 VDC. If the power supplied is lower than 20.4 VDC, TP70P-211LC1T and
TP04P-20EXL1T may stop working and all outputs may be OFF.
2. When the power is cut, TP70P-211LC1T and TP04P-20EXL1T still can work for up to 10 milliseconds. However, if the
power is cut for longer than 10 milliseconds, TP70P-211LC1T and TP04P-20EXL1T may stop working and all outputs
may be OFF. After the power is restored, TP70P-211LC1T and TP04P-20EXL1T resume to work. TP70P-211LC1T
and TP04P-20EXL1T are featured with latching auxiliary relays and retentive registers. You can take advantage of
this feature while programming.
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