00195166-0402_SM_D4_EN - 第24页
Overview Electrical System Power Supply U nit 24 Serv ice Manual SIPLACE D4 Structure of the signaling circuit The six signaling conta c ts for the covers are co nnected in parallel a nd form the "cover signal"…
Overview
Power Supply Unit Electrical System
Service Manual SIPLACE D4
23
Service socket
The service socket is located in the power supply unit and is protected by the cover. It can only be used
if the placement system is connected to the main power supply via a 5-wire connection (L1, L2, L3, N,
and PE). If a 4-wire connection is used, e.g. without N, the socket cannot be used.
EMERGENCY STOP Loop and Signaling Circuit
Structure of the EMERGENCY STOP loop
The following contacts are connected in series and form the EMERGENCY STOP loop:
normally open (NO) contacts for the four protective cover switches
normally open (NO) contacts in the two protective switches for the cover flaps over the PCB conveyor
Normally open (NO) contacts for the two EMERGENCY STOP buttons
normally open (NO) contacts for the four component trolleys
normally open (NO) contacts for the four flaps over the push-buttons for raising the CO tables
channels 2 and 3 of the protective contactor combination K1
If the EMERGENCY STOP loop is closed, 24 VDC is present at channels 2 and 3 of the PCC. The two
green LEDs for channels 2 and 3 light up in addition to the green Power ON LED.
DANGER:
Observe the safety instructions for lethal voltages, even when the machine is switched off.
3-8: Signal LED on the protective contactor combination
Legend
1. Power
2. Channel 1
3. Channel 2
Overview
Electrical System Power Supply Unit
24 Service Manual SIPLACE D4
Structure of the signaling circuit
The six signaling contacts for the covers are connected in parallel and form the "cover signal" circuit. If
one or more covers are opened, the contacts close, and the 24 V signal reaches the CAN bus and
signals that one of the covers is open.
The two signaling contacts for the EMERGENCY STOP buttons are connected in parallel and form the
"EMERGENCY STOP push-button signal circuit". When an EMERGENCY-STOP button is pressed, a
24 V signal is sent to the CAN bus and signals that one of the EMERGENCY-STOP buttons has been
pressed.
The four signalling contacts for the push-button flaps are connected in parallel. They form the "Flap
signal" circuit. If one or more flaps are raised, a 24 V signal will be applied to the CAN bus, signaling that
one of the cover flaps is not closed.
The four signalling contacts for the CO trolleys are connected in series and form the "changeover table"
signal loop. If a CO trolley is missing, a 0 V signal is sent to the CAN bus. If all trolleys are connected,
the signal is approximately 16 V.
EMERGENCY STOP loop functions
The following conditions must be fulfilled before the placement system can be started or operated:
all four component trolleys must be docked in and connected.
All protective covers must be closed.
Both cover flaps over the PCB conveyor must be closed.
Both emergency stop pushbuttons must be released.
all four flaps over the push-buttons for raising the CO tables must be closed.
The minimum operating pressure must have been reached.
The "software enable" signal must be active. This ensures that the EMERGENCY STOP loop is
closed.
The power supply sends 24 V to the start buttons and the protective contactor combination.
If one of the start buttons is now pressed, the protective contactor combination PCC will switch and
activate the following components:
– 200 V link voltage for the servo amplifiers of the gantry axes
– 150 V link voltage for the star axes
– The axis unit will receive a "Servo Enable" signal for the servo amplifier.
– 34 V operating voltage is switched to the component trolleys.
– 24 V operating voltage is switched to the used tape cutters.
– The PCB conveyor control receives the enable signal for the PCB clamping, the PCB stopper
and the lifting table control.
The machine is then ready for use.
Overview
Power Supply Unit Electrical System
Service Manual SIPLACE D4
25
3-9: EMERGENCY STOP loops