THE ART OF WELDING
P6 HW
82-100 PN-0110008 Rev. 12
Electrical and electronic drawings6. 2. 8.
Warning
The following description refers to the wiring fi le for
the P6 HW (Ref. 002506xxxx), as well as those follo-
wing:
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
Hot wire source adaptor card Ref. 002821xxxx
Welding source adaptor card Ref. 002827xxxx
inductor & pump interface Ref. 002822xxxx
touchscreen interconnection Ref. 002823xxxx
LCD/USB/RJ45 interconnection Ref. 002824xxxx
remote control keyboard Ref. 002825xxxx.
Hot wire interface Ref. 0021700771.
The signal names are abbreviations of their functions.
It is useful to know the convention whereby if the
number is preceded by a slash “/”, this means that
the signal is active at low level (0 V).
On the block diagram, the number inside the frames
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 V
ac
at 50 Hz or 60 Hz.
The basic functions of the P6 HW 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 devices.
Besides the PC card, the rotation and wire control cards
(0028019100) and the LVDS screen and touchscreen
control card (0028069100) are directly connected to
sequencer card 1. The welding current source inter-
face card (0028029400) is connected via a ribbon
cable with sequencer 1. All the cards communicate
via an SPI (Serial Peripheral Interface) synchronized
on 3 wires. A single wire connects several information
sources in parallel such as the welding head and wire
feeder models along with the equipment properties of
the welding station.
The main part of the P6 HW cabling transits via the
sequencer card connectors or the cards connected to
it. 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). These
are directly connected to sequencer card 2. The “arc
voltage measurement” card (0028079100) converts
the workpiece.electrode voltage into digital signals
via an SPI bus to sequencer card 2. A second source
card (0028029200) connected to sequencer card 2
controls the “hot wire” current source.
Welding current source
The current source is totally integrated and uses
“chopper” technology. The current setting, generat-
ed by the source card, is an analogue signal from 0 V
to +10 V, where +10 V corresponds to 520 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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