THE ART OF WELDING
P6
76-92 PN-0509076 Rev. 16
Electrical and electronic drawings6. 2. 9.
Warning
The following description is referenced to the folder
of the connection diagram of the power source P6
(Ref. 002505xxxx), and the others below:
remote control unit Ref. 002616xxxx
touchscreen Ref. 002611xxxx
sequencer card Ref. 002800xxxx
source interface card Ref. 002802xxxx
LVDS interface card Ref. 002806xxxx
rotation/wire feeding card Ref. 002801xxxx
AVC/oscillation card Ref. 002803xxxx
Arc voltage measurement card Ref. 002807xxxx
source adapter card Ref. 002827xxxx
inductor & pump interface Ref. 002822xxxx
touchscreen interconnection Ref. 002823xxxx
LCD/USB/RJ45 interconnection Ref. 002824xxxx
remote control keyboard Ref. 002825xxxx.
The signal names are abbreviations of their functions.
If the signal is active at low voltage (0 V), its name is
preceded by a slash (/).
On the block diagram, the number inside the frame
Fo:xy indicates the page number of the correspond-
ing folder.
General description and wiring diagram
The various power supplies for the cards or compo-
nents come from a sub-assembly providing 5 switch-
ing power supplies connections, operating from mains
voltages of 90 V to 260 Vac at 50 Hz or 60 Hz.
The basic functions of the P6 are realised by a PC
card of the PC104 standard, connected to the
sequencer card (0028009100). This sequencer card
is the main link between the commands issued by
the PC card and the signals for the controlled devic-
es. In addition to the PC card, the sequencer card
is connected directly to the rotation and wire speed
control cards (0028019100) and to the command
card (0028069100) for the LVDS display and touch-
screen. The source interface card (0028029300) is
connected via fl at cable to the sequencer. All of these
cards communicate via a 3-wire synchronous serial
SPI (Serial Peripheral Interface) bus. A single wire
enables several sources of information to be connect-
ed in parallel, such as welding head and wire feed
unit models, and the properties of welding set equip-
ment.
For the AVC/oscillation options, a second Sequencer
card, connected to the basis sequencer card, makes
it possible to controlboth speed control cards for the
AVC and oscillation motors (0028039100). The latter
are directly connected to sequencer card 2. The «arc
voltage measurement» card (0028079100) converts
the part/electrode voltage into digital signals through
an SPI serial bus to sequencer card 2.
The source
The current source is totally integrated and uses
“chopper” technology. The current setting, generated
by the source card, is an analogue signal from 0 V to
+10 V, where +10 V corresponds to 300 A.
A logic command, active at low level (0 V), commands
the source to switch on, and another logic command,
active at low level (0 V), controls the HF unit. If the
source overheats, the welding set orders stoppage of
the weld cycle.
The power source also outputs a display of the welding
current (+10 V corresponds to an actual 1000 A) and
of the welding set’s output voltage (+10 V corre-
sponds to actual value of 100 V). These displays are
used for monitoring ignition, short circuits, and the
displays on the remote control or the touchscreen.
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