70 MAN. PS 254 EN – Ind. 2
Fig. 4.17 : Remote control
Désignation Référence
Ground cable 64599801
Flowmeter Argon 75501002
Flowmeter Argon/Hydrogen 71701421
Cooling liquid 75110071
Fuses 75501207
4.2.4. Circuit description
! Remark
The following information refers to the wiring
scheme of the PS 254 (Ref. 1700 xx xx) and
the remote control pendant (Ref. 1436 xx xx or
1737 xx xx) as well as to the sequencer card
(Ref. 217 00 633), the synoptic card (Ref. 217
00 634), the source interface card 217 00 690,
the memory circuit interface card (Ref. 217 00
680), and the interface tacho-impulses (Ref.
217 00 647).
The signals are described by an abbreviated
name corresponding to their function. It is
useful to recognise that a signal preceded by a
bar " / "signifies that it is active at the low level
(0 V).
The numbers inscribed at the bottom right of
the synoptic blocks relate to the folio numbers
of the corresponding dossiers. For example,
the number 08 in the block "Gas control" of the
sequencer card corresponds to folio 08 of
dossier number 21700633.
! General presentation and wiring
scheme
The functioning of the PS 254 is principally
controlled by 2 cards: the 21700633 sequencer
card and the 21700634 synoptic card. These
two cards are linked together by a data bus
I²C. This connection is built up via the memory
circuit interface card 217 00 680.
The sequencer card ensures the correct follow
up of weld cycles by the power source. It is
linked to the power supply, the rotation motor,
the wire feed motor, and watches for the
correct functioning of the gas valves and the
cooling circuit. The microchip is also found on
this card.
The synoptic card, controlled by the sequencer
card, controls the peripheral units (keyboard,
indicators and display screen), the memo card,
the remote control pendant and the printer.
! The power switch
The power switch consists of a self holding
switch K2. When the power is turned on, the
K2 switch is activated. It then remains in this
state until the power is turned off (K1 is
activated). K1 is directly linked to the
emergency stop button via the synoptic card
(folio 21700634). The loss of voltage or the
pressing of the emergency stop button
activates K1, which immediately cuts off the
power supply. To restart the weld cycle you
must turn on the machine again with the power
switch. This system has been designed for
safety reasons.
To Next Page
Loading...
