LaserGuard2 Instruction Manual
April 2015
Page 20 of 31
Figure 12: Laser Connector Wiring Diagram
Wire the outputs of the laser support unit (TB3) to the crane control panel (refer to Figure 10 or Figure
13). The recommended wire size is 16 AWG, but can be between 24 to 12 AWG. Please observe
National Electrical Code (NEC) guidelines when wiring electrical devices.
Please note that the "NO" and "NC" markings on the laser support unit control board are the conditions of
the output relays when a range point or a fault has been detected. Place snubbers across the contactor
coils in the crane's control panel that are to be controlled as necessary.
Run power to the power supply in the LSU (refer to Figure 10 and Figure 11). Make certain that the input
power provided matches the input requirements of the power supply used in this system; if it does not,
stop here and notify Magnetek Customer Service.
Turn on the power to the laser support unit and note that the green LED on the laser head is on
continuously after a few seconds. If that does not occur, turn the power off and recheck all wiring.
For wiring special crane configurations such as magnetic control, timed bypass, or stepped/stepless VFD,
see the figures listed below in the back of the manual.
Figure 14: LaserGuard2 Stepped Series 4 VFD Control, Protection in One Direction (Recommended)
Figure 15: LaserGuard2 Crane Control, Protection in One Direction
Figure 16: LaserGuard2 Crane Control with Timed Bypass, Protection in One Direction
Figure 17: LaserGuard Magnetic Crane Control, Protection in Both Directions
Figure 18: LaserGuard2 Stepped VFD Control, Protection in One Direction
Figure 19: Typical LaserGuard2 Interface with Stepless VFD Control
Figure 20: Typical LaserGuard2 Interface with P&H Stepless Control
