Mitsubishi Electric MELSECQ Series User Manual page 46

4
PROCEDURES AND SETTINGS BEFORE
OPERATION
Inverter
Terminal
block
Install I/O wires at least
150 mm (5.91 inch)
away from the high
voltage equipment such
as relay and inverter.
(Apply this wiring in a
control panel as well.)
AC
motor
Ground the shielded twisted pair cable on the encoder side (relay box).
(The following connection example is for 5 V sink load.)
Current for encoder
To A
To B
To the QD63P6
4
- 6
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(5) The following diagram shows an example of wiring for measures against
noise.
Programmable
controller
QD63P6
Terminal
Avoid using a solenoid valve and inductive load together in the same
block
metallic pipe. If a sufficient distance cannot be secured with high voltage
cable due to such as duct wiring, use CVVS or other shielded cable for the
high voltage cable.
Cart
+5V
To encoder
0V
A
B
5V
E
E
Figure 4.3 Example of wiring for measures against noise
(6) When wiring the QD63P6 and an encoder, separate the power supply
cable and signal line. (Refer to POINT in Section 4.4.2.)
4.4 Wiring
4.4.1 Wiring precautions
search engine
Make the distance between the encoder and relay box as
short as possible.
Relay box
If the distance is long, a voltage drop may occur. Therefore,
check that the voltages while the encoder is in
operation/stop are within the rated voltage at the terminal
block of the relay box using the measure such as a tester.
If the voltage drop is large, take the measures such as
thickening the wire size or using the 5 VDC encoder of less
Encoder
current consumption.
Connect the shielded cable of the encoder and that of the
shielded twisted pair cable inside the relay box. If the
shielded cable of the encoder is not grounded inside the
encoder, ground it in the relay box as indicated by the
dotted line.