10.3 Meaning and Function of Signal for Starting Point Detecting Function (Optional board Pr(OP)-003
[EH500])
10-6
HW0480311
HW0480311
10.3
Meaning and Function of Signal for Starting Point
Detecting Function (Optional board Pr(OP)-003
[EH500])
Read this section only when the starting point detection function is used.
The following table shows the cable number of connection terminal block and corresponding
signals.
• The starting point detection function is an optional function. The
optional board Pr(OP)-003 [EH500] is included when the starting point
detection function is ordered, that is, not included in standard package.
• The optional board for EH500 is Pr(OP)-003 [EH500]. The optional board
Pr(OP)-003 for MOTOWELD-EL350 cannot be used for MOTOWELD-EH500.
No.
Connection
Terminal
Block Cable
No.
Signal
Meaning
Function
Direc-
tion
*1
Signal Form
1
520
Power supply
for starting
point detec-
tion I/F
Power supply for starting point
detecting instruction and sending
/receiving of the starting point
detection signal
R
→
W
+24V
±
10%,
current capac-
ity of 30mA or
more
2
521
Starting point
detection sig-
nal
The signal is output when the
output "+" (torch side) of welding
source drops to approx. 0V while
the starting point detecting
instruction is ON.
W
→
R
Transistor out-
put
(ON when 0V),
sink current of
50mA or less
3
522
Common
Power cable on 0V side of the
power supply for starting point
detection I/F.
R
→
W
4
523
Starting point
detection
instruction
While this signal is ON:
1. The high voltage (full-wave
rectification, peak value of
280V) for the starting point
detection is applied between
welding source
’
s output
"
+
"
(torch side) and
"
-
"
(base
metal side).
2. Lights
"
Search Mode
"
lamp in
red on the front panel.
R
→
W
Contact output
(Valid at
closed)
CAUTION
85/129
