R&M Materials Handling ELECTRIC CHAIN HOISTS LoadMate Chain Hoist LM 16-20-25 - Manual (Page 35)

LM16-20-25 I&M MANUAL/EN/11.30.2010
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Copyright © (2010) R&M Materials Handling, Inc. All rights reserved.
6.11 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.
m
CAUTION: The primary limit device that controls the upper limit of travel is an emergency
device only. It shall not be used as an operational means to stop travel during normal
operations. Do not permit continuous contact between the hoist body and the load block /
fall stop assembly.
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 six (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.