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direction in order to allow for braking distance. Spot-
weld or mount the limit switch plate in this position.
You repeat this same procedure for the limit switch for
the gate’s closing travel using the other end of the gate
leaf. Put the gate leaf in the closed position and use the
FCC light (or Close LED) as the trigger indicator. Note
that each limit switch plate must be located 1-3/4 in. (45
mm) in advance of the limit switch trigger point to
allow for smooth braking.
Connect the Limit Switches to the Control Panel:
Next, you need to wire the limit switch sensors to the
control panel according to your gate installation (see
Figures 13 and 17 for the 844 MPS and Figure 15 for
the 844 B/C).
Check the Limit Switches for Correct Positioning
:
To check limit switch positioning, close the gate,
disengage the motor with the Manual Release, and
select the E1 or B operating logic on the control panel
(see page 6). Turn on the power and generate an input
signal. The motor will turn in the opening direction but
the gate will not move because the motor is disengaged.
Note
: On the 844 MPS (
only
) control panel, an
attached warning light flashes every 1/4 sec and the
control panel makes a rapid clicking sound if the
limit switch cable becomes disconnected or if both
limit switches are triggered at the same time.
Correct the cabling and/or cycle your main power
off then on and/or press the Reset button to correct
the alarm condition on the control panel.
Next, move the gate by hand in the opening direction.
As the limit switch plate moves by the limit switch, the
motor should turn off. If the limit switch plate does not
stop the motor from running when it passes the near end
of the limit switch assembly, change the cable connec-
tion for the limit switches (see Figure 13 or 15).
Generate another input signal to start the motor in the
direction of the gate’s closing. Move the gate by hand to
the fully closed position. The limit switch should again
shut off the motor.
If the limit switch is functioning properly, engage the
operator’s motor with the Manual Release lever and
signal the gate to operate. If the gate operates properly,
the limit switch plates can be welded securely to their
anchoring points.
(a) left closing rack and pinion gate
(b) right closing rack and pinion gate
(c) left closing chain gate
(d) right closing chain gate
J3 J4
J3 J4
J3 J4
J3 J4
Figure 13. On the 844 MPS control panel,
connect the limit switch ribbon cable for
your rack and pinion or chain drive gate
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