Shadow VI User Manual
1107200
Troubleshooting Shadow VI
Chapter 4
page 89
Checking and Replacing Control Relays
DANGER
!
IMPROPER SAFETY RELAY REPAIR
•
Replace the Shadow VI Control board before placing the safety product back into operation
after the occurrence of a failed relay.
If a relay fuses
•
DO NOT reset the Shadow to restart the machine.
•
Remove the Shadow from operation immediately and replace the Shadow VI Control board
before operating the press again.
Failure to comply with these instructions will result in death or serious injury.
WARNING
!
ELECTRIC SHOCK HAZARD WHEN WORKING INSIDE ENCLOSURE WITH POWER ON
•
DO NOT touch electrical connections or circuit boards.
•
Use test equipment only on the terminals specified in the instructions.
•
Ensure that this test is performed by qualified personnel.
Failure to comply with these instructions could result in death or serious injury.
WARNING
!
ELECTRIC SHOCK HAZARD WHEN CHECKING OR REPLACING RELAYS
•
Turn off and disconnect power from the Shadow safety light curtain and from the machinery
it is connected to before checking relays or replacing the Shadow VI Control board unless
the test requires power to be on. This includes disconnecting power to the machine control
and motor.
•
Ensure that all tests and repairs are performed by qualified personnel.
Failure to comply with these instructions could result in death or serious injury.
If the Relay Has Failed Completely
If a relay has failed completely (will not energize to close contacts or the contacts are welded
shut), Shadow immediately stops the machinery and will not allow further press operation.
The red light will always be on.
In this case, you cannot check relay contacts with a voltmeter (see next section). This is
because Shadow will not allow relay operation if a relay failure occurs. Even the contacts of
the good relay will be open and all voltages will be zero. You must replace the Shadow VI
control board (see
Содержание Shadow VI
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