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contact, no voltage relay contacts or open collector transistor opto-coupler devices.
In the 4-schedule start mode,
each one of the four input
signals individually selects a
single weld schedule. With
the weld head firing switch
connected across Pins 2 and
5 (START 2) for example,
Weld Schedule 2 will start
when the firing switch
closes.
In the 7-schedule start mode,
the four input START
signals are used to define the
BCD number of the desired
weld schedule, as follows:
Pin 1: START 1 (Bit 2
Pin 2: START 2 (Bit 2
Pin 3: START 3 (Bit 2
Pin 4: START 4 (Bit 2
In this mode, the firing
switch could be connected
typically in series between
Pin 5 (ground) and the
START signal ground bus.
Weld
Schedule Selection and
Start Timing. The weld
schedule number is defined
within 20 milliseconds from
the ON state of the first
START signal. If the first
START signal is shorter than 20 milliseconds, the weld cycle will not start. As shown in the timing
diagram on the following page, Weld Schedule 3 is being selected since START 1 and START 3
are turned ON within the 20-millisecond window.
IP-215A/IP-217A FINE SPOT WELDING POWER SUPPLIES
993-603 REV A: October, 1996
CABLE WIRING AND SIGNAL SPECIFICATIONS
0
)
1
)
2
)
3
)
B-7
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