Yaskawa LEGEND Digital Torque Amplifier - Manual (Page 20)

2.1 Main Circuit Wiring
9
2. Wiring
2.1 Main Circuit Wiring
Here we will show representative examples of main circuit wiring, the functions of the main
circuit terminals, as well as the power input sequence, etc. Observe the following cautionary
items when wiring.
■
Main Circuit Terminal Names and Functions
• Do not pass the power line and signal lines through the same duct or bundle them together. Keep the
power line and signal lines at least 30cm apart when wiring.
• Use a twist pair wire or multi-core twisted-pair bundled shield wire for the signal and encoder lines.
The maximum wiring length is 3m for the command input line, and 20m for the encoder feedback line.
• Do not touch the power terminal for 5 min. after power OFF as a high voltage may remain even after
• Suitable for use on a circuit capable of delivering not more than 5000 A
rms
(symmetrical)
power OFF.
Perform inspection work after checking that the CHARGE lamp has gone out.
• Do not turn the power ON/OFF frequently. Limit ON/OFF repetition to one time per minute.
Because the digital torque amplifier has a capacitor in its power unit, a large charging current (charging
time: 0.2sec.) will be fed at power ON. For this reason, frequent power ON/OFF switching degrades the
main circuit element within the digital torque amplifier.
Table 2.1: Main Circuit Terminal Names and their Functions
Terminal
Code
Name Function
L1, L2 or L1,
L2, L3 Main Circuit Power
Input Terminal
100W/400W
Single Phase 90~253 V
1.0kW~1.5kW
Three Phase 90~253 V
U, V, W
Motor Connection
Terminal
Connected to motor.
L1C, L2C
Control Power Input
Terminal
Single Phase 90~253 V
(2 places) Ground Terminal
Perform “Ground Processing “ by connecting with the power
grounding terminal and the motor grounding terminal.
CAUTION