Service Manual HS60 - 第51页

Se rv ice M a nu al HS-6 0 2 Ope rati on al saf et y 03/ 200 3 U S Iss ue 2.4 Safe ty eq uipme nt 49 If the safety loop is closed, 24 VDC i s present at channels 2 and 3 of the P CC. The two green LEDs for channe ls 2 an…

2 Operational safety Service Manual HS-60

2.4 Safety equipment 03/2003 US Issue

Sockets for connecting the CO trolleys (item 1 in Fig. 2.4 - 6) 2

These sockets are used to supply the necessary voltages and compressed air to the CO trolleys.

The terminals for the safety and signalling circuits are also integrated into these sockets. This pre-

vents the placement system being started up before the component trolleys. If the component ta-

ble is not connected, the protective contactor combination trips and deactivates all the modules.2

Push-button for raising and lowering the CO trolleys (item 2 in Fig. 2.4 - 6) 2

Use the push-buttons to raise and lower the component trolley table bed. To use this push-button,

and thus the drives for the component table you must first move the placement head out of the

range of the component feeder table and open the flap over the button. After changing the com-

ponent table, you must first close the flap over the button once again. 2

– If the flap is closed, the safety circuit contact will close and the signalling contact will open. The

machine is then ready for use.

– If the flap is open, the safety circuit is interrupted and the signalling contact closes. An error

message will appear on the screen prompting you to close the flap. The machine can then be

restarted using the Start button.

Uninterruptible power supply (UPS), station computer (item 3 in Fig. 2.4 - 6) 2

Both the UPS and the station computer are contained beneath the input conveyor. 2

WARNING Always follow the safety instructions concerning potentially lethal volt-

ages - even when the placement system is switched off. 2

2.4.4 Safety circuit and signalling circuit

2.4.4.1 Structure of the safety circuit

The following contacts are connected in series and form the safety circuit loop: 2

– 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 CO trolleys

– make contacts for the four flaps over the push-buttons for raising and lowering the CO trolleys

– channels 2 and 3 of the protective contactor combination PCC

Service Manual HS-60 2 Operational safety

03/2003 US Issue 2.4 Safety equipment

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. 2

2.4.4.2 Structure of the signalling circuit

The six signalling contacts for the covers are connected in parallel and form the "cover signal" cir-

cuit. If one or more covers are opened, the contacts close - 24 V signal reaches the CAN bus and

signals that one of the covers is open. 2

The two signalling contacts for the EMERGENCY-STOP mushroom-head push-button are con-

nected in parallel and form the "EMERGENCY-STOP mushroom-head push-button signal" circuit.

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. 2

The four signalling contacts for the push-button flaps are connected in parallel. They form the

"Flap signal" circuit. 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. 2

The four signalling contacts for the CO trolleys are connected in series and form the "Component

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. 2

2.4.4.3 Description of the functions of the safety circuit

The following conditions must be fulfilled before the placement system can be started or operated:2

– all four CO trolleys 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.

– all four flaps over the push-buttons for raising and lowering the CO trolley must be closed.

– the minimum operating pressure must have been reached.

– the software Enable signal must have been given, thus activating the safety circuit.

– The power supply must be sending 24 V to the start buttons and the protective contactor com-

bination.

– 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 for the gantry axes

– 100 V link voltage for the star axes

– operating voltage for the lifting table motors

– the servo unit will receive a "Servo Enable" signal for the servo amplifier.

– 34 V operating voltage is switched to the CO trolleys

2 Operational safety Service Manual HS-60

2.4 Safety equipment 03/2003 US Issue

– 24 V operating voltage is switched to the used tape cutters.

The machine is then ready for use. 2