1.4.2 Safe System Power and Reboot Sequencing

• The SP-ICE-3 Card's output ports can change state unexpectedly during any of the following sequences:

  • while the card is being powered up;

  • while the card is being powered down;

  • while the card is being rebooted.

• Consequently, the system power and reboot sequences described below MUST be followed to prevent the laser being activated unexpectedly and causing potentially grave personal injury.

  In particular:

  • the Scan System must always be switched on after the Host-PC and control software have been started or rebooted;

  • the Laser Source must always be switched on last, after all other system components have been started or rebooted;

  • the Laser Source must always be switched off first , before any other system components are stopped or rebooted;

  • the Scan System must always be switched off before the Host-PC and control software are stopped or rebooted.

  Otherwise, the laser beam may be activated at an unexpected and potentially dangerous position.

1.4.2.1 Power-Up Sequence.

To avoid unexpected and dangerous activation of the laser, always follow this power-up sequence for the components of a complete Laser System:

1. First switch on

   • either the Host-PC containing the internally installed SP-ICE-3 Card,

   • or the power supply for an externally installed SP-ICE-3 Card.

2. Next switch on

   • any necessary peripheral devices.

3. Then switch on

   • the power supply for the Scan System.

4. Finally switch on

   • the Laser Source.

1.4.2.2 Power-Down Sequence.

When switching off the components of a complete Laser System, the power-down sequence should be the exact reverse of the power-up sequence:

1. First switch off

   • the Laser Source.

2. Next switch off

   • the power supply for the Scan System.

3. Then switch off

   • any necessary peripheral devices.

4. Finally switch off

   • either the Host-PC containing the internally installed SP-ICE-3 Card,

   • or the power supply for an externally installed SP-ICE-3 Card.

1.4.2.3 Card Reboot Sequence.

If it should be necessary to reboot the SP-ICE-3 Card without cycling its power supply, the following sequence must be observed:

1. First switch off

   • the Laser Source.

2. Next switch off

   • the power supply for the Scan System.

3. Then switch off

   • any necessary peripheral devices.

4. Now reboot the SP-ICE-3 Card

   • either by use of the Reset Jumper (JP300 RST),

   • or by software command from the card's Web Interface (see: 17.2 How to Open the Card's Web Interface).

5. Then switch on

   • any necessary peripheral devices.

6. Then switch on

   • the power supply for the Scan System.

7. Finally switch on

   • the Laser Source.