2-23
j
Terminal Block Current and Wire Sizes
The following table shows the rated effective currents flowing to the Servo Driver and the sizes of the
electrical wires.
D
Servo Drivers with 200-VAC Input (R88D-UEP
H)
Driver (Watts)
R88D-UEP04H (100 W)
R88D-UEP08H (200 W)
R88D-UEP12H (400 W)
R88D-UEP20H (750 W)
Power supply input
current (R, T)
2.5 A
4.0 A
6.0 A
11.0 A
Motor output cur-
rent (U, V, W)
0.87 A
2.0 A
2.6 A
4.4 A
Power supply input
terminal wire size
0.75 mm
2
or AWG 18 min.
1.25 mm
2
2.0 mm
2
Motor output
i
l
i
i
0.5 mm
2
or AWG 20
AWG 20 (see note) to AWG 18
terminal wire size
Use OMRON standard cable. The applicable wire size for motor connectors is AWG22 to AWG18.
Ground terminal
wire size
Use 2.0-mm
2
external ground wires. Use the same wire as used for the motor output.
Note If the cable length is 15 meters or longer for a 750-W Servomotor, the momentary maximum torque at rota-
tion speeds of 2,500 r/min or higher may drop by approximately 7%.
D
Servo Drivers with 100-VAC Input (R88D-UEP
L)
Driver model (Watts)
R88D-UEP10L (100 W)
R88D-UEP12L (200 W)
R88D-UEP15L (300 W)
Power supply input current (R, T)
4.5 A
8.0 A
10.0 A
Motor output current (U, V, W)
2.2 A
2.7 A
3.7 A
Power supply input terminal wire
size
0.75 mm
2
or AWG 18
min.
1.25 mm
2
2 mm
2
Motor output terminal wire size
AWG 20 to AWG 18
Use OMRON standard cable. The applicable wire size for motor connectors is
AWG22 to AWG18.
Ground terminal wire size
Use 2.0-mm
2
external ground wires. Use the same wire as used for the motor
output.
j
Wire Sizes and Allowable Current
The following table shows allowable currents when there are three electrical wires. Use values equal to
or lower than the specified values.
D
Heat-resistant Vinyl Wiring, UL1007, Rated Temperature 80
°
C (Reference Value)
AWG size
Nominal cross-
sectional area
(
2
)
Configuration
(wires/mm
2
)
Conductive
resistance
(
Ω
/k )
Allowable current (A) for
ambient temperature
(mm
2
)
(
)
(
Ω
/km)
40
°
C
50
°
C
60
°
C
20
0.5
19/0.18
39.5
6.6
5.6
4.5
---
0.75
30/0.18
26.0
8.8
7.0
5.5
18
0.9
37/0.18
24.4
9.0
7.7
6.0
16
1.25
50/0.18
15.6
12.0
11.0
8.5
System Design and Installation
Chapter 2
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