User manual
7 Installation
−28−
Wiring the power supply cable and signal cable
Use a shielded cable of AWG16 to 14 (1.25 to 2.0 mm
2
) or larger for the main power supply, and wire the
power supply cable over the shortest possible distance.
Use a shielded cable of AWG28 to 16 (0.08 to 1.25 mm
2
) for the 24 VDC power supply, and wire the power
supply cable over the shortest possible distance.
Use a shielded cable of AWG28 (0.08 mm
2
) or more for the I/O signals, and wire the signal cable over the
shortest possible distance. An optional driver cable (sold separately) is available. Refer to p.138.
To ground a shielded cable, use a metal clamp or similar device that will maintain contact with the entire
circumference of the shielded cable. Attach a cable clamp as close to the end of the cable as possible, and
connect it as shown in the figure.
Cable clamp
Shielded cable
Notes about installation and wiring
• Connect the motor, driver and other peripheral control equipment directly to the grounding point so as to
prevent a potential difference from developing between grounds.
• When relays or electromagnetic switches are used together with the system, use mains filters and CR
circuits to suppress surges generated by them.
• Keep cables as short as possible without coiling and bundling extra lengths.
• Place the power cables such as the motor and power supply cables as far apart [200 mm (7.87 in.)] as
possible from the signal cables. If they have to cross, cross them at a right angle. Place the AC input cable
and output cable of a mains filter separately from each other.
• If a motor cable is required between the motor and driver, it is recommended that an optional cable or
flexible cable (sold separately) be used, since the EMC measures are conducted using the Oriental Motor
cable.
Example of installation and wiring
Motor
Programmable
controller
A: Cable clamp
Driver
Shielded
cable
Shielded cable
Motor cable
Encoder cable
(shielded cable)
Driver cable
(shielded cable)
Grounded panel
OPX-2A
Mains filter
24 VDC
power supply
Surge arrester Mains filter
AC
AC
PE
FG
FG
FG
PE
PE
A
A
A
PE
PE
Electromagnetic
brake cable