Shadow 8 User Manual
1139300
Troubleshooting
4-9
Checking and Replacing Control Relays in Optional
Shadow 8 Control Box
If the stop relays in the optional Shadow 8 control are not working properly, you must first
determine the cause of the problem.
If a relay malfunction prevents clearing of the Curtains Obstructed state (i.e., allowing the
Machine Run/Stop LED to turn from red to green), the problem is most likely that the contacts
on one or both of the relays are welded shut, or a relay coil will not energize to close the
contacts. In either case, replace the Relay board as instructed on page 4-11.
If the relay contacts appear to be cycling (i.e., opening and closing) and the Machine Run/Stop
LED is illuminated green, the problem is likely that a relay contact is pitted or burned, causing
resistance at the contact to be so high that no current can flow through the contacts. Perform a
resistance test (see page 4-10) to determine if the relays need to be replaced.
AVOID IMPROPER SAFETY RELAY REPAIR
Replace the Relay board on the optional Shadow 8 control Main board (see Figure 2-20, page 2-32)
before placing the safety product back into operation after the occurrence of a failed relay.
If a relay fuses:
• DO NOT reset Shadow 8 to restart the machine.
• Remove Shadow 8 from operation immediately and replace the Relay board before operating
the press again.
Failure to comply with these instructions will result in death or serious injury.
GUARD AGAINST 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.
GUARD AGAINST ELECTRIC SHOCK HAZARD WHEN CHANGING RELAYS
• Turn off and disconnect power from the Shadow 8 safety light curtain and from the machinery it
is connected to before checking relays or replacing the Relay 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.
DANGER
!
WARNING
!
WARNING
!
Summary of Contents for Shadow 8
Page 95: ...1139300 Shadow 8 User Manual 3 10 Operation ...
Page 107: ...1139300 Shadow 8 User Manual 4 12 Troubleshooting ...
Page 111: ...1139300 Shadow 8 User Manual B 2 Checkout Procedure Log ...
Page 113: ...1139300 Shadow 8 User Manual C 2 Test Procedure Log ...
Page 135: ...1139300 Shadow 8 User Manual D 22 Extracts from OSHA and ANSI ...
Page 136: ...Shadow 8 User Manual 1139300 Extracts from OSHA and ANSI D 23 ...
Page 137: ...1139300 Shadow 8 User Manual D 24 Extracts from OSHA and ANSI ...
Page 143: ...1139300 Shadow 8 User Manual I 4 Index ...
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