47
Chapter 4
Connection
C
ONNECTION
OF
E
XTERNAL
E
QUIPMENT
C
ONNECTION
C
HAPTER
4
NOTE
•
Connect welding power source and target device after carefully read the instruction manual
of target device. Add current limiting resistor if capacitor is connected to the contact of
target device.
•
If an ammeter is accidentally connected to the output-terminal for voltmeters, the ammeter
and/or the wiring will be burnt. Fully confirm to which the ammeter is to be connected.
•
When connecting a voltmeter and/or a voltmeter, be careful for short-circuit between the
positive wiring (+) and the negative wiring (-).
4.5.2.2
Connection of terminal for external connection
This section explains the procedure for connection to the terminal for external connection.
•
WCR output signal
WCR signal is the output of relay contact. Ensure to keep the maximum
rated power of the contact.
Maximum rated power of relay contact
WCR: 125 VAC / 0.5 A, 30 VDC / 1 A at resistance load As a rough
indication, use at 80% of the ratings.
To prevent electric shock, ensure to follow the instructions below:
•
Wiring should be performed by qualified persons or persons familiar with the welding
machine.
•
Do not touch the input and output terminals and the internal live electrical parts of the
welding power source.
•
Before starting the work, make sure to cut the input power with the disconnect switch
connected to the welding power source and wait three minutes or more. In addition, do
not turn on the primary power until the work is complete.
•
Do not use damaged cable or cable without grounding.
•
Securely attach the case and cover of the welding power source after connecting the
cables.
Use the following cable for connecting to the terminal for external connection:
•
Cable thickness: AWG22 to AWG16 (0.33 to 1.3 mm
2
)
•
Using a cable or terminal not specified will be a cause of heat generation and fire.
Furthermore, cable other than specified cannot be connected to the terminal for
external connection.
CAUTION
•
The control cable drawn out from the terminal for external connection should be kept away
from the welding power cable or the torch cable as much as possible.
Otherwise, failure may occur due to noise during use.
•
Do not pull out the cables other than the cable that is connected with the terminal block on
the printed circuit board.
Malfunction or error may occur.
Relay contact
Current limiting
resistor
Welding power
source side
㻌
-V
+V
+
-
