Purpose:
Electrical LOTO allows for power control of a system or subsystem by workers in
accordance with mill rules and safety regulations.
2.3.2.2 Scanner Drive Interlock
Description:
The scanner drive interlock is a 24V armed circuit that disables the motor drive enable
signal when voltage is broken by either faulty wiring, or either of the SCANNER STOP
operator buttons on each end column (see Figure 34).
Fig. 34. SCANNER STOP Button
Purpose:
The scanner drive interlock prevents the motor drive from being enabled, without cutting
power to the drive, and prevents the motor from turning.
2.3.2.3 Scanner Crash and Forward/Reverse Limit Switches
Description:
Magnetic reed switches mounted into a track groove (see Figure 35) are triggered by
magnets in the upper and lower carriages. Signals are reported to the frame control PCBs
in the cable end.
Fig. 35. Motion Control Limit Switch
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