R&M Materials Handling ELECTRIC CHAIN HOISTS LoadMate Chain Hoist LM 10 - Manual (Page 36)

LM10 I&M MANUAL/EN/11.30.2010
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Copyright © (2010) R&M Materials Handling, Inc. All rights reserved.
7.9 Limit Switches
7.9.1 Upper and Lower Travel Safety Limit Switch
The Upper and Lower Travel Limit Switch is an automatic reset type switch and connected to the control
circuit. The switch housing is recessed into the underside of hoist body.
The upper and lower limit switches are emergency protection devices and are not to be used as a continuous
stop.
The hook block activates the upper limit switch as it contacts the limit switch that is located on bottom side of
hoist body. Once the switch is activated, the “UP” circuit is opened. The fall stop activates the lower limit
switch when hook block is lowered to its lowest travel position. The limit switch is activated and opens the
“down” circuit.
The lower limit position is adjustable between the lowest travel and maximum lift. It is adjusted by
repositioning the fall stop assembly on free end of load chain. The fall stop
SHALL always be located at
least 6 inches [150mm] from end of last chain link. The upper limit position is adjustable only when an
additional fall stop assembly is added between the hook block assembly and the hoist body.