Seies | 1570-1015 | Rev | 2022-03-01 | e-mail csd@pow.com Section | 3
Section 9 | Sequence of Operation
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4. The carriage overtravel limit switch is a safety device mounted on the
column above the uppermost oor level limit switch. In the event of
failure to activate the uppermost oor level limit switch, the overtravel
limit switch is activated when it comes into contact with the carriage
mounted safety cam shoe on the side of the carriage. The switch cuts the
power to the motor circuit. The motor starter contacts open, the motor
stops, and the brake is applied. This stops and holds the carriage position.
If the uppermost oor level limit switch fails, have a qualied electrical
controls technician investigate why and correct the problem before
re-activating the VRC. See Figure 9-4.
Sequence
(continued)
Limit Switch
Figure 9-4
Overtravel
Limit Switch
Intermediate Level
Limit Switch
(On VRCs with more
than 2 levels, all
intermediate levels
will use this switch
arrangement)
15690-1001-S.SMG
PFL-1249
Upper Level
Limit Switch
15690-1001-S.SMG
PFL-1101
Lower Level
Limit Switch
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