YASKAWA Varispeed V7 Instruction Manual page 31

5. Voltage drop should be considered when determining the wire size.
Voltage drop can be calculated using the following equation:
Phase-to-phase voltage drop (V)
=
(A) × 10
Select a wire size so that voltage drop will be less than 2% of the
normal rated voltage. Increase the wire size according to the length
of the cable if there is a possibility that the voltage may drop.
Wire and Terminal Screw Sizes
1. Control Circuits
Model
Same for
all mod-
els
2. DeviceNet Terminal Block (CN6)
Model
Same for
all mod-
els
Note: When removing the DeviceNet terminal block, hold the control circuit
terminal block (TB1).
30
× wire resistance (Ω/km) × wiring distance (m) × current
3
-3
Terminal Symbols Screws
S1 to S4, P1, P2, M2
SC, PC
Terminal Symbols Screws
V−, CAN_L, M3
shield, CAN_H,
V+
Tighten-
ing
Torque
Applicable Size
N•m
(lb•in)
2 AWG
mm
0.22 to Twist- 20 to
0.25 ed 18,
(1.94 to wires: 20 to
2.21) 0.5 to 16
0.75,
Sin-
gle:
0.5 to
1.25
Tighten-
ing
Torque
Applicable Size
N•m
(lb•in)
AWG
2
mm
0.5 to Twist- 24 to
0.6 ed 12
wires:
0.2 to
2.5
Wires
Recom- Type
mended Size
2 AWG
mm
0.75 18 Shielded
or equiva-
lent
Wires
Recom- Type
mended Size
AWG
2
mm
Thin
DeviceNet
cable that
meets
DeviceNet
cable
specifica-
tions