－
59
－
11. APPLIED FUNCTION
(Continued)
Signals Name and Functions about 12P Terminal Block
Pin No.
Signal Name
Function
(1)
+
–(2)
-
READY
(output)
Welding
power source
standby
Terminals for standby signal of welding power source.
When there is no Open Phase, Operation Stop, Output Over
Current or Abnormal Temperature and the power switch is ON, this
signal is valid (internal TR breakover).
*1
(3)
+
– (4)
-
STOP (input)
Operation
Stop
These terminals are used for Operation Stop.
The machine will stop operation when these terminals are open.
When Operation Stop (function) becomes effective, the welder will
automatically stop operation. To restore normal operation, just shut
off the welding torch switch and then close (short-circuit) the
terminals.
To prevent accidental restoration of “operation stop”, use of a self-
lock switch (press down to connect and lock, press down again to
unlock and disconnect) is recommended.
*2
(5) – (6)
WCR (output)
Current
Detection
Contact of relay for detection of welding current.
When welding current output is available, the contact will close.
*3
(7)
+
– (8)
-
GAS (input)
Open and
closing of gas
valve
To use this terminal when gas valve open or close through external
signal. Open the gas valve when short circuit occurs between
terminals.
*
２
(9)
+
–(10)
-
Ammeter
Terminals for connecting an ammeter
Use the Ammeter (400A/60mV) for CPTX-I 400 2W.
Use the Ammeter (600A/60mV) for CPTX-I 500 2W.
(11)
+
– (12)
-
Voltmeter
Terminals for connecting a voltmeter
Use the voltmeter (full scale 100V, part number:4401-016)
*4
⚫
Precaution for connection with terminals on the terminal block
The wires from the terminal blocks should be twisted for each signals to avoid accidental operation.
Take care that the wires form the terminal blocks do not cross other signal wires from other welding
power source.
*1: The equi
valent circuit is as the figure shown below. The maximum capacity of TR is 80V,
100mA. When connecting such as relay to two terminals, do not exceed 80% of the maximum
capacity of TR. (Figure 1)
*2: The equivalent circuit is shown in the right figure. Connect a contact with a capacity greater than
10mA to between the terminals. (Figure 2)
*3: Rating of the provided relay contacts is 125V AC, 0.5A, 30V DC, 1A. Do not exceed 80% of the
rating of the provided relay contacts.
*4: Be careful that no-load voltage (100V or less) is applied to between the terminals during welding
Figure 1
Figure 2
