Autoquip SLACK CHAIN SENSING SWITCHES – FLM & FLMC - Manual

35100961 – Rev.1
SLACK CHAIN SENSING SWITCHES – FLM & FLMC
(Ref. Figures 32, 33a & 33b)
The slack chain sensing switch kits have been shipped loose to be field mounted, wired,
and adjusted per the procedure below. These switches are intended to turn off the
motor and stop movement of the carriage whenever a slack/broken chain status is
sensed.
DANGER !
To avoid personal injury or death, the procedures described in this section
should only be performed by qualified service personnel.
1. To install the slack chain sensing switches, first gain a safe access to the drive
base at the top of the masts. There is a slack chain sensing switch kit provided for
each lifting chain, (2) total.
2. With the carriage hanging from the chains, each tensioner arm will be pushing
towards the sensing switch arm. Each switch is wired to be normally open – held
closed.
a. Install each switch assembly onto its respective Unistrut channel as shown
in Figure 33a.
b. With the sensing switch arm mounted hanging down & tightened, slide the
sensing switch assembly in the Unistrut channel towards the tensioner
arm until the switch arm pushes against the tensioner arm and the
switches electrical contacts close (listen for the “click”). See Fig. 33b.
c. Tighten the two bolts holding the switch mounting angle to the Unistrut.
NOTE: To change the actuation direction of the switch, remove the switch head. Change
the actuating control knob/mechanism to the desired actuation direction.
(Reference Figure 32)
INSTALLATION INSTRUCTIONS