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3 Electrical Installation
• Always make sure the ground impedance is conformed to the requirements of local safety
and installation regulations.
• Never share the ground wire with other devices such as welding machines, etc.
• Do not loop the ground wire when using more than one drive.
Control Circuit Wiring Precautions
Consider the following precautions for wiring the control circuits.
• Separate control circuit wiring from main circuit wiring and other high-power lines.
• Separate wiring for control circuit terminals MA, MB, MC (contact output) from wiring
to other control circuit terminals.
• For external control power supply use a UL Listed Class 2 power supply.
• Use twisted-pair or shielded twisted-pair cables for control circuits to prevent operating
faults.
• Ground the cable shields with the maximum contact area of the shield and ground.
• Cable shields should be grounded on both cable ends.
Main Circuit Terminals
Terminal
R/L1, S/L2, T/L3
U/T1, V/T2, W/T3
B1, B2
+1, +2
+1, –
(2 terminals)
EN16
Type
Main circuit power sup-
ply input
Drive output
Braking resistor
DC reactor connection
DC power supply input For connecting a DC power supply.
Ground Terminal
YASKAWA Electric TOEP C710606 27 AC Drive - J1000 Quick Start Guide
Connects line power to the drive.
Drives with single-phase 200 V input power use terminals R/L1
and S/L2 only (T/L3 is not used).
Connects to the motor.
For connecting a braking resistor.
Linked at shipment. Remove the link to install a DC choke.
For 200 V class: Ground with 100 Ω or less
For 400 V class: Ground with 10 Ω or less
Function
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