Omron OMNUC FND Series User Manual page 96

Design and Installation
Contactors
When selecting contactors, take into consideration the circuit's inrush current and the momentary maxi-
mum current. The Position Driver inrush current is 50 A, and the momentary maximum current is
approximately twice the rated current. The following table shows the recommended contactors.
Maker Model
OMRON G6C-2BND
LY2-D
G7L-2A-BUBJ
J7AN-E3
LC1D25106
LP1D25106
Leakage Breakers
Select leakage breakers designed for inverters.
Since switching operations take place inside the Position Driver, high-frequency current leaks from
the armature of the Servomotor. With inverter leakage breakers, high-frequency current is not de-
tected, preventing the breaker from operating due to leakage current.
When selecting leakage breakers, also remember to add the leakage current from devices other than
the Servomotor, such as machines using a switching power supply, noise filters, inverters, and so on.
For detailed information on how to select leakage breakers, refer to the catalogs provided by the
manufacturers.
The following table shows the Servomotor leakage currents for each Driver model.
Driver model
FND-X06 /X12
FND-X25
FND-X50H
Note 1. Leakage current values shown above are for motor power lines of 10 m or less. The values will
change depending on the length of power cables and the insulation.
Note 2. Leakage current values shown above are for normal temperatures and humidity. The values
will change depending on the temperature and humidity.
j Improving Encoder and Resolver Cable Noise Resistance
Signals from the encoder are A-phase, B-phase, or S-phase. The A-phase and B-phase frequency is
154 kHz, and the S-phase baud rate is 616K bits/s.
Signals from the resolver are analog voltage signals.
Follow the wiring methods outlined below to improve encoder/resolver noise resistance.
Be sure to use dedicated encoder and resolver cables.
If lines are interrupted in the middle, be sure to connect them with connectors, making sure that the
cable insulation is not peeled off for more than 50 mm. In addition, be sure to use shielded wire.
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Rated Momentary maxi-
current mum current
10 A ---
10 A ---
25 A ---
15 A 120 A
26 A ---
26 A ---
Leakage current (direct)
(including high-frequency current)
35 mA
0-P
40 mA
0-P
120 mA
0-P
Chapter 2
Coil voltage
24 VDC
24 VDC
24 VDC, 200 to 240 VAC
24 VDC
200 VAC
24 VDC
Leakage current (resistor-capacitor,
in commercial power supply fre-
quency range)
2 mA
rms
2 mA
rms
3 mA
rms