![background image](http://html.mh-extra.com/html/faac/746-er-cat/746-er-cat_installation-manual_535531007.webp)
7
WARNING!
The anti-crush feature should not be
considered adequate safety protection for pedestrians
or property! Other additional reversing accessories,
such as photocells and reversing edges, must be
installed.
If the electronic speed sensor detects any slowing down
of the gate while it is opening, caused by any form of
obstacle in the gate’s opening path, the operator stops.
The gate can then be closed by sending another input
signal. If the electronic speed sensor detects any slowing
down of the gate during its closing phase, the gate
automatically re-opens.
The electric motor, two-disc clutch, and reduction gear
are completely immersed in a special oil that lubricates
the moving parts and also dissipates heat generated while
the unit is operating. The heat is further dissipated
through the outer casing of black anodized aluminum.
The holding power of the gear mechanism ensures that
the gate stays perfectly shut. There is no need to fit an
additional lock on the gate.
The Manual Release mechanism is a key- and lever-
operated device that allows you to open or close the gate
by hand whenever the need arises. The Manual Release
mechanism is useful, for example, when the electrical
power goes out and you want to open or close the gate.
A limit switch assembly stops the drive motor when the
limit switch plates mounted on the gate are sensed. The
limit switch is inductive and watertight to increase its
reliability and functionality.
The adjustable electronic braking system insures that the
gate stops exactly where and when required.
Two die-cast flanges surround the pinion to prevent
foreign objects from being inserted between the rack and
pinion either accidentally or intentionally. A guard
around the sprockets on the chain version of the 746
Operator provides comparable safety.
Operating Logic
The 746 MPS control panel provides the following
operating logics (see page 8 for more detail):
E1
and
E2
The two semi-automatic operating
logics are designed for users who
want to signal the gate to open, stop,
and close. The two modes differ in the
way triggered reversing devices affect
gate behavior during closing.
A1
and
A2
The two automatic operating logics
are
designed for users who want to
signal the gate to open and then
automatically close after a preset
pause time. The two modes differ in
the way triggered reversing devices
affect gate behavior during closing
and while the gate is pausing before it
closes.
Manual Release Mechanism
The Manual Release mechanism is used during
installation or when no electrical power is available.
To use the Manual Release mechanism (see Figure 2), lift
the lock cover and insert the key. Then rotate the key in
the clockwise direction and pull the Manual Release lever
out as shown in Figure 2. This disengages the operator
motor from the pinion or chain sprocket.
Now you have to move the gate by hand to open it or
close it. Also, the gear reduction of the final drive is
deactivated, so the gate will not lock in a closed position.
To re-engage the operator motor for normal operation,
close the Manual Release lever, turn the key
counterclockwise and remove it, and shut the lock cover.
Push the gate leaf an inch or two in either direction to re-
engage the operator. You should feel the operator re-
engage.
(a)
(b)
Figure 2. To use the Manual Release lever, (a) lift
the lock cover and insert the key; (b) then turn
the key clockwise and pull out the Manual
Release lever as shown.
Содержание 746 ER CAT
Страница 18: ...18 ...