Rockwell Automation 802T Plug-In Limit Switch - Manuel

Publication 40146–752–02(A)
July 1993
Printed in USA
INSTALLATION AND OPERATING INSTRUCTIONS
BULLETIN 802T, PLUGĆIN LIMIT SWITCH
MOUNTING
Position the conduit entering the switch such that any fluid inside
the conduit will not drain into the switch enclosure. Apply sealing
compound to conduit threads to prevent against entrance of
fluids through the threads.
The base may be mounted by either of two methods:
1. Two #10–32 tapped holes are provided for rear
mounting.
2. Two clearance holes for #10 screws are provided for
front mounting.
WIRING
The pressure type connector terminals in the base will accept
No. 12 AWG and smaller solid or stranded wire. For proper tight-
ening, it is suggested that nothing smaller than No. 18 AWG be
used. Before inserting wire under the pressure plates, strip the
insulation approximately 3/8 inch. Tighten all pressure plate ter-
minals whether used or not, to avoid interference with the switch
cover.
A grounding screw is located in the terminal base enclosure near
the conduit opening. If the grounding screw has a self lifting pres-
sure plate and a wire barrier, the proper installed position of the
ground wire is between the pressure plate and the wire barrier
in a direction parallel to the edge of the casting. Be sure the
ground wire does not interfere with the gasket or with the switch
portion of the device.
After wiring has been completed, check that all wires are in the
wiring cavity of the terminal block so they will not interfere with
the switch when it is plugged into the terminal block. Recheck all
wiring terminal screws for tightness.
Note: For switches which have been factory wired, check wire
color and their position in the terminal block for proper cir-
cuit hookup.
When the switch has been plugged into the terminal block, se-
curely tighten the two cover screws to compress the body gas-
ket.
ACTUATOR HEAD POSITIONING
The actuator head may be placed in any of four positions on the
switch body. Loosen the four captive screws. Place the head in
the desired position and securely retighten the four screws. (See
Figure 1 below).
FIGURE 1
LEVER POSITIONING
The lever on rotary actuated devices is adjustable to any position
through 360
°
around the shaft. Loosen the nut, move lever to de-
sired position and securely retighten the nut. (See Figure 2 be-
low).
FIGURE 2
LOCK PIN NUT
CHANGING DIRECTION OF ACTUATION
The switch action of most lever operated limit switches may be
adjusted to operate with either a clockwise, a counterclockwise,
or both direction movement of the shaft. The maintained and
neutral position style of devices operate in both directions and
cannot be changed.
To change actuation direction, follow the steps below:
Important: These procedures must be performed in a clean en-
vironment to avoid introduction of dirt into the oper-
ating mechanism.
Step 1. Loosen the four head mounting screws and re-
move the operating head from the switch body.
Step 2. Locate the plunger on the underside of the operat-
ing head.
Step 3. Pull the plunger outward and rotate it in steps of
90
°
to provide the operating mode desired. The
respective settings are shown in Figure 3.
Step 4. Make sure the plunger is pushed back inward and
the “O” ring is properly seated before the operat-
ing head is reattached to the switch body.
Step 5. Securely retighten (approx. 12–18 in.-lbs.) the op-
erating head mounting screws.
Step 6. Check for desired actuation mode.
FIGURE 3
CCW ONLY CW & CCW CW ONLY
PLUNGER
ACTUATION
SETTING
REQUIRED
RENEWAL PARTS
If renewal parts or additional lubricant is required, give the bulle-
tin number, catalog number, and series letter found on the name-
plate.
WARNING: To avoid electrical shock and/or unin-
tended operation of equipment, disconnect all
power to the limit switch and the controlled equip-
ment before proceeding with any repair or adjust-
ment of the limit switch.
CAUTION: Make sure the screws used for rear
mounting are not so long as to interfere with the
screws used to secure the front to the base.
CAUTION: The contacts in each switching element
must have the same polarity. The circuit diagram is
shown on the nameplate