Part No. 62401
Genie S-100 • S-105 • S-120 • S-125
7 - 63
Section 7 • Repair Procedures
First Edition • First Printing
LIMIT SWITCHES
8-1
Limit Switches
How to Test the Limit Switches
There are 2 types of limit switches: Mechanical
(roller arm) and proximity. Mechanical limit
switches are activated by a part of the machine
physically moving the roller arm of the switch.
Proximity switches are a magnetic type of switch
and are activated by the close presence of a
ferrous metal.
Mechanical Operational Limit Switch:
1 Manually activate the limit switch.
Result: The limit switch arm should move freely
and spring return to center. A distinct click
should be felt and heard.
2 Connect the leads from an ohmmeter or
continuity tester to the deutsch connector
terminals in the combination listed below and
check for continuity.
terminal 1 to 2
continuity
(zero
)
terminal 3 to 4
no continuity
(infinite
)
terminal 1 to 3 and 4
no continuity
(infinite
)
terminal 2 to 3 and 4
no continuity
(infinite
)
3 Activate the limit switch. Connect the leads from
an ohmmeter or continuity tester to the deutsch
connector terminals in the combination listed
below and check for continuity.
terminal 1 to 2
no continuity
(infinite
)
terminal 3 to 4
continuity
(zero
)
terminal 1 to 3 and 4
no continuity
(infinite
)
terminal 2 to 3 and 4
no continuity
(infinite
)
Mechanical Safety Limit Switch:
1 Connect the leads from an ohmmeter or
continuity tester to the deutsch connector
terminals in the combination listed below and
check for continuity.
terminal 1 to 2
continuity
(zero
)
terminal 3 to 4
continuity
(zero
)
terminal 1 to 3 and 4
no continuity
(infinite
)
terminal 2 to 3 and 4
no continuity
(infinite
)
Содержание S-100
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