MAN. PS 254 EN – Ind. 2 75
! The source
The power command, generated by the
sequencer card, is an analogical signal 0 to 10
V. At 10 V, it corresponds to 160 A, and at 0 V
it corresponds to the minimum current of the
source, 4 A, for the 160A range; at 10 V it
corresponds 50 A, and at 0 V it corresponds 4
A, for the 50 A range.
A logic order active at high level (15 V) controls
the running of the source.
The source sends a signal indicating that it is
overheated. The signal is released by the
sequencer card to stop the weld cycle and
display the code of the detected fault (27).
The high frequency generator is controlled by
a signal emitted from the sequencer card. A
relay contact ensures that this action occurs.
The other pole of contact is linked to an
alternative voltage of 42 V.
! The remote control pendant
The buttons on the control pendant are
controlled by the synoptic card (21700634).
Most of the buttons are tested by the line and
column method: A high level signal is placed
on a line and the columns are tested. If a
column is at a high level, this shows that the
button associated with this line and column
has been pressed. The next line is tested
afterwards, and so on. Only the two safety
buttons are directly linked.
The «In cycle» indicator is a light emitting
diode LED.
Fig. 4.21 : Remote control pendant logic
LINE COLUMN BUTTON
11BT 1
12BT 16
13BT 11
14BT 14
21BT 5
22BT 15
23BT 12
24BT 9
31BT 6
32BT 10
33BT 13
34BT 8
41BT 4 (1)
42BT 4 (2)
43BT 4 (4)
44BT 4 (8)
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