Installation Instructions
Original Instructions
Neutral Position Plug-in Limit Switch
Bulletin Number 802
WARNING: To avoid electrical shock and/or unintended operation
of equipment, disconnect all power to the limit switch and the
controlled equipment before proceeding with any repair or
adjustment of the limit switch.
Overview
Mounting
IMPORTANT
Position the conduit that leads into the switch so that
any fluid inside the conduit does not drain into the
switch enclosure. Apply a sealing compound to the
conduit threads to help prevent against fluids entering
at the joint.
You can mount the base by either of two methods:
A neutral position limit switch is a device that consists of two different switching
elements that are contained in one enclosure. As shown in Figure 1, these
switching elements are operated in a specific manner with only one of the two
being operated at a time.
1.
When an external operator of the device is moved in one direction, one of the
switches is operated: the second switch remains unoperated. The switch action
reverses when the actuator moves in the opposite direction: the second switch
operates, the first does not.
2.
The operating head and the switch unit that is 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.
Figure 1 - Operation
CCW Operation
Reset
CW Operation
1
2
1
2
1
2
3
5
4
6
3
5
4
6
3
5
4
6
7
8
7
8
7
8
Two #10…32 tapped holes are provided for rear mounting.
IMPORTANT
Be sure the screws that are used for rear mounting are
not so long as to interfere with the screws that are
used to secure the front to the base.
Two clearance holes for #10 screws are provided for front mounting.
Wiring
IMPORTANT
The contacts in each switch element must have the
same polarity. The circuit diagram is shown on the
nameplate.
The pressure type connector terminals in the base accept 4 mm2 (12 AWG) and
smaller solid or stranded wire. For proper tightening, use nothing smaller than
1 mm2 (18 AWG). Before inserting the wire under the pressure plates, strip the
insulation approximately 9.5 mm (0.375 in). Tighten all pressure plate terminal
screws, whether used or not, to avoid interference with the screw cover.
A grounding screw is enclosed in the terminal base near the conduit opening. If the
grounding screw has a self-lifting pressure plate and wire barrier, the proper
installation 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 that the ground
wire does not interfere with the gasket or the switch portion of the device.
After you complete the wiring, check that all wires are in the wiring cavity of the
terminal block do not interfere with the switch when it is plugged into the terminal
block. Recheck all wiring terminal screws for tightness.
For switches that have been wired at the factory, check the 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
Lever Positioning
The actuator head can be placed in any of four positions on the switch body.
The lever that is used with rotary actuated devices is adjustable to any position
through 360° around the shaft.
1.
2.
3.
Loosen the four captive head screws.
Place the head in the desired position.
Securely retighten the four screws.
1.
2.
3.
Loosen the nut.
Move the lever to the desired position.
Securely retighten the nut.
Lock Pin
Nut
Renewal Parts
If you require renewal parts or additional lubricant, give the bulletin number,
catalog number, and series letter found on the nameplate.
Waste Electrical and Electronic Equipment (WEEE)
At the end of life, this equipment should be collected separately from any unsorted municipal waste.
Rockwell Automation maintains current product environmental compliance information on its website at rok.auto/pec.
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Publication 802-IN001B-EN-P - June 2021 | Supersedes Publication 802-IN001A-EN-P- July 1993
Copyright © 2021 Rockwell Automation, Inc. All rights reserved. Printed in the U.S.A.
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