3 Fig. 3.2 - 4 Primary terminals of transformer T1 Secondary side of transformer T1 3 3 Fig. 3.2 - 5 Secondary terminals of transformer T1 18 03/2003 Edition Student Guide HS-50 / HS-60 Advanced II 3 Power Supply Transformer T1 supplies the following voltages on the secondary side:
– 3 x 140 VAC
– 3 x 5 VAC
– 3 x 24 VAC
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– 3 x 25 VAC – 3 x 6 VAC – 3 x 38 VAC – 3 x 20 VAC 3.2.2.5 Measuring voltages at the main power filter Z1 and electrolytic capacitor C1 L1 L2 L3 PE E Z1 A L1 L2 L3 PE + - C1 R1 Fig. 3.2 - 6 Power supply unit - plan view Z1 E A C1 R1 Module Main power filter for 36 A 3-phase systems Input terminals of main power filter Z1 Output terminals of main power filter Z1 33000 μF / 63 V electrolytic capacitor Discharge resistor Terminal L1, L2, L3 + / - Voltages 3 x 204 VAC / 3 x 230 VAC / 3 x 380 VAC 3 x 400 VAC / 3 x 415 VAC 52 VDC Main power filter Z1 Electrolytic capacitor C1 Student Guide HS-50 / HS-60 Advanced II 3 Power Supply 03/2003 Edition 19 3.2.2.6
Terminal panel of the power supply unit
Fig. 3.2 - 7 Terminal panel of the power supply unit T1 P200 V N200 V X2 X3 X4 X5 X6 X7 X8 X9 X10 X11 X12 X13 11.1 kVA three-phase transformer M6 screw terminal (+) for supplying the servo amplifiers of the x/y axes M8 screw terminal (-) for supplying the servo amplifiers of the x/y axes To the PC To monitor 1 To monitor 2 To lifting table 1, PCB conveyor 1 To lifting table 2, PCB conveyor 1 To lifting table 3, PCB conveyor 2 (option) To lifting table 4, PCB conveyor 2 (option) To the servo unit To the main distribution unit (non-stabilised DC voltages) To the PCB handling system / lifting table controller From/to the main distribution unit, (control signals, power supply) From/to the main distribution unit, (SSK peripherals) 3 The pin assignments of the individual plugs are shown in the detailed circuit diagrams in section 3 %uit diagrams\ 3 20 03/2003 Edition Student Guide HS-50 / HS-60 Advanced II 3 Power Supply 3.2.3
Primary side of the transformer
V8 F11 SZ1 F3 St1 X1 Bu1 Z1 S1 MS1 W ith the machine switched on by the main switch (Z1), power ist first supplied over the inrush current limiter (EST) to the primary side of the transformer EST This causes a small feedback signal on the secondary side, which activates contactor SZ1. F1 PC Monitor MS3 X5 Lifting table 1 W ith contactor SZ1 activated the inrush current limiter (EST) is short circuit and furthermore without function. The machine is now ready for operation. ELR1 MS4 X6 Lifting table 2 On the primary side can be found the power supply for the service plug (Bu1), the board net where the station computer and the two monitor are connected to and the power supply of the four lifting tavle motor. SZ2 SZ3 MS5 ELR2 X7 Lifting table 3 Lifting table 4 MS6 X8 Fig. 3.2 - 8 Primary side of the transformer 3.2.4 Secondary side of the transformer W ith the primary side connected to the main supply voltage bypassing the inrush current limiter the secondary side drives now also: Supply voltage for the control unit Supply voltage for the component table logic Supply voltage for the component table to drive the feeder modules Reduced supply voltage for the Star-axis SZ23 ILS V1 SZ2 SZ3 M10 / M8 F4 X/Y axes V2 F5 X9 V3 For all the other voltages first the machine has to be started by the ON button. Supply voltage to be conveyor motors Supply voltage for the Z/DP-axis Star axes Z/DP axes V4 F6 F7 The SSK activates then contactor SZ2 and SZ3 by a 24V signal and voltage is supplied over the inrush current limiter (ILS) to X and Y. W ith a short delay also contactor SZ23 is activated by the 24V to short circuit contactor SZ3 as well as the inrush current limiter (ILS). X and Y are now driven by full power. W ith X and Y fully suplied also the Star axis is now supplied by the main voltage. X9 V5 F8 V6 F9 Conveyor system Component table 2 Control unit Component table 1 V6 F10 Fig. 3.2 - 9 Secondary side of the transformer Student Guide HS-50 / HS-60 Advanced II 3 Power Supply 03/2003 Edition 21
3.2.5
3.2.5.1
Safety circuit
Structure of the safety circuit
The following contacts are connected in series and form the safety circuit loop: – make contacts for the four protective cover switches – make contacts for the two PCB conveyor covers
– make contacts for the two emergency stop mushroom-head push-buttons – make contacts for the four component tables
– make contacts for the four flaps over the push-buttons for raising and lowering the component tables
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– channels 2 and 3 of the protective contactor combination (PCC)
If the safety 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. 3
3.2.5.2 Structure of the signalling circuit
The six signalling contacts for the covers are connected in parallel and form the \er signal\circuit. If one or more covers are opened, the contacts close - the 24 V signal reaches the CAN bus and signals that one of the covers is open.
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The two signalling contacts for the emergency stop mushroom-head push-button are connected in parallel and form the \mergency stop mushroom-head push-button signal%uit. When an emergency stop mushroom-head push-button is pressed, a 24 V signal is sent to the CAN bus and signals that one of the emergency stop mushroom-head push-buttons has been pressed. 3
The four signalling contacts for the push-button flaps are connected in parallel. They form the \aps signal%uit. If one or more flaps is raised, a 24 V signal is applied to the CAN bus and signals that one of the cover flaps is not closed.
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The four signalling contacts for the component tables are connected in series and form the \ponent table signal\oop. If a component table is missing, a 0 V signal is sent to the CAN bus. If all the tables are connected, the signal is approximately 16 V.
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3.2.5.3 Functional description of the safety circuit
The following conditions must be fulfilled before the placement system can be started or oper- ated:
– all four component changeover tables must be docked and connected.
– all covers - four over the gantries, one over the PCB input belt and one over the output belt - must be closed.
– both emergency stop mushroom-head push-buttons must be released
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03/2003 Edition
Student Guide HS-50 / HS-60 Advanced II
3 Power Supply