Rockwell Automation 802 Neutral Position Plug-In Limit Switch - Manuel

Publication 40146-793-02(A)
July 1993
Printed in USA
INSTALLATION AND OPERATING INSTRUCTIONS
BULLETIN 802-NEUTRAL POSITION PLUG‐IN LIMIT SWITCH
IMPORTANT: SAVE THESE INSTRUCTIONS FOR FUTURE USE.
GENERAL
A neutral position limit switch is a device which consists of two separate switching elements
contained in a single enclosure. These switching elements are operated in a specific manner
with only one of the two being operated at a time.
When the external operator of the device is moved in one direction, one of the switches is
operated, the second switch remaining unoperated. Moving the actuator in the opposite
direction reverses the switch action; the second switch operates, the first one does not. (See
Figure 1 below.)
The operating head and the switch unit used in this style of device are unique and can only
be used with one another. Operating heads or switches from other styles of devices cannot
be interchanged with these devices.
1 2
4 3
5 6
8 7
1 2
4 3
5 6
8 7
1 2
4 3
5 6
8 7
CW OPERATION RESET CCW OPERATION
FIGURE 1
MOUNTING
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 #12 AWG and smaller solid or
stranded wire. For proper tightening, it is suggested that nothing smaller than #18 AWG be
used. Before inserting wire under the pressure plates, strip the insulation approximately 3/8
inch. Tighten all pressure plate terminals 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 pressure 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 circuit hookup.
When the switch has been plugged into the terminal block, securely tighten the two cover
screws to compress the body gasket.
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 2 below).
FIGURE 2
LEVER POSITIONING
The lever on rotary actuated devices is adjustable to any position through 360
 around the
shaft. Loosen the nut, move lever to desired position and securely retighten the nut. (See
Figure 3 below).
FIGURE 3
LOCK PIN NUT
RENEWAL PARTS
If renewal partsor additionallubricant isrequired, givethe bulletinnumber, catalognumber,
and series letter found on the nameplate.
WARNING: To avoid electrical shock and/or unin­
tended operation of equipment, disconnect all power
to the limit switch and the controlled equipment be­
fore proceeding with any repair or adjustment of the
limit switch.
CAUTION: 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 at the joint.
CAUTION: Make sure the screws used for rear mounting
are not so long as to interfere with the screws used to se­
cure 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