AB-5961
10
Wiring
WARNING
Before wiring and maintenance, be sure to turn off the power to the product.
Failure to do so might cause electric shock.
After wiring, be sure to reattach the terminal cover.
Failure to do so might cause electric shock.
CAUTION
Installation and wiring must be performed by qualified personnel in accordance with all applicable safety standards.
All wiring must comply with applicable codes and ordinances.
Be sure to provide a circuit breaker for the power to the product.
To connect the wires to the screw terminals, use crimp terminal lugs with insulation.
Failure to do so might cause fire or device failure due to short circuit.
Firmly tighten the terminal screws.
Insufficient tightening of the terminal screws might cause fire or overheating.
Do not use unused/spare terminals on the product as relay terminals.
Doing so might cause malfunction.
Precautions for wiring
●
For power wiring and temperature/humidity output wiring, 1.25 mm² or 2 mm² shielded multi-core cables (JCS CVV-S
cables) are recommended.
- Be sure to ground the shielding on the controller side.
- For Model HTY78X3D/HY78X3D/TY78X3D series, ground the shielding on the duct sensor side as well.
- If dust-proof and splash-proof enclosure are not required,
1.25 mm² or 2 mm² JIS IV cable can be used for power wiring and temperature output wiring, and 1.25 mm² shielded
cable can be used for humidity output wiring.
- The maximum wiring length is 100 m.
JCS: Japanese Electric Wire & Cable Makers’ Association Standards
●
Do not connect the cable for power supply to the temperature output terminals.
Doing so will generate smoke.
●
Always check wiring before supplying power.
Do not allow the 24 V AC transformer for the duct sensor to supply the power to any other devices.
●
Because the temperature sensor model with RTD (Pt1000) output is two-wire, the wire resistance will cause measuring
error. For instance, 1.25 mm
2
size wire causes approx. 0.1 °C measuring error every 10 m. Correct the measuring error by
setting the controller in connection.