Wintriss Shadow 8, User Manual

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Shadow 8 User Manual 1139300
Troubleshooting 4-11
Replacing the Relay Board
If one or both of the Shadow 8 safety relays fail, you should replace the entire Relay board
(see Figure 2-20, page 2-32). You can order a new board from Wintriss Tech. Support. To
replace the Relay board, do the following.
1.
Turn off power to Shadow 8.
2.
With one hand, push the two plastic clips holding the top of the board in place away from
the edges of the board, then with the other hand grasp the top of the board firmly by its
sides and pull it gently out of its socket. Remove the bottom of the board from its
retaining clips by pushing the clips aside and pulling the board upward.
3.
Plug the replacement board into the Relay board socket, and snap the plastic clips into
place to secure the board.
4.
Power Shadow 8 back up.
Checking for and Correcting Cross Talk
If the Machine Run/Stop LED indicator on the Main Receivers of two Shadow 8 units
mounted close to one another (e.g., on adjacent presses) illuminates alternately green and red
when there is no visible obstruction in the light field, “cross talk” may be the cause. Cross
talk occurs when the LEDs in the transmitter of one unit are detected by the phototransistors
in the receiver of the other unit.
To diagnose the problem, first try swapping the transmitter with the receiver on one of the
sets. If the symptoms disappear, cross talk was the problem. You can also place an opaque
barrier between the two sets, making sure that the barrier runs all the way from the transmitter
to the receiver. If the symptoms disappear, cross talk was the problem.
To eliminate cross talk between two Shadow 8 units, refer to Preventing Cross Talk between
Two Sets of Shadow 8 Heads, page 2-27.
AVOID IMPROPER SAFETY RELAY REPAIR
Replace the Shadow 8 Relay board after the occurrence of a failed safety relay before placing the
light curtain back into operation.
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.
DANGER
!
WARNING
!