2.6 Selecting Peripheral Devices
2.6.1 Recommended Power Supply
2-20
2.6
Selecting Peripheral Devices
2.6.1
Recommended Power Supply
The same input power supply is used for both the main circuit power and control power. Use
an input power supply that meets the following conditions.
•
A 24-VDC power supply must be used.
•
The power supply must have double or reinforced insulation and must also be certified for
safety standards.
•
The power supply must not output more than 50 A.
•
Protective measures must be implemented for external branch circuits according to the NEC
(National Electrical Code) or other local laws or ordinances.
Selection Table
The recommended Power Supply is given in the following table.
2.6.2
Molded-case Circuit Breakers and Fuse Capacity
Use a molded-case circuit breaker and fuse to protect the power supply line. They protect the
power line by shutting OFF the circuit when overcurrent is detected. Select molded-case circuit
breakers and fuses that have the following breaking characteristics.
Breaking Characteristics (25
°
C):
•
Power must not be shut OFF even if the instantaneous maximum current flows to the SERVOPACK
for 5 s or longer.
•
Does not cut off at the inrush current value of the power supply.
Note: Connect the molded-case circuit breakers and fuses before the isolated 24-VDC power supply.
*1.
This is the value for the maximum instantaneous load.
*2.
This is the value when the recommended power supply is used.
2.6.3
SERVOPACK Power Supply and Servomotor Power
Cable Wires
This section provides specifications and precautions for making your own cables for use between the
SERVOPACK and the power supply and between the SERVOPACK and the Servomotor.
Input Power Supply
Order Number
Manufacturer
24 VDC
HWS300-24
TDK-Lambda Corporation
Input
Power
Supply
Maximum Appli-
cable Motor
Capacity [kW]
SERVOPACK
Model
Power Supply
Capacity per
SERVOPACK
[W]
*1
Input Current Capacity
Inrush
Current
[A0-p]
*2
Rated Voltage
Continuous
Rating [A]
Instantaneous
Maximum [A]
Fuse
[V]
Molded-case Cir-
cuit Breaker [V]
24 VDC
0.05
SGPSS-3R1C
215
3.3
11.5
6
250
240
1. If you do not use the recommended Power Supply Input Cables and Servomotor Power
Cables, use the wire sizes in the following table.
2. Use copper wires with a rated temperature of 80
°
or higher.
3. Use copper wires with a rated withstand voltage of 100 V or higher.
4. Use a power supply input cable with a maximum length of 3 m and a Servomotor power cable
with a maximum length of 10 m.
Terminal Symbols
Wire Sizes
Wires for Input Power Supply
P, N, FG
AWG20 (0.52 mm
2
) min.
Servomotor Power Cable
U, V, W
AWG20 (0.52 mm
2
) min.
Important
