Rockwell Automation Allen-Bradley 802T Instructions D'installation

Installation Instructions
Original Instructions
Plug-in Limit Switch Installation and Operating Instructions
Catalog Numbers 802T
ATTENTION: To avoid electrical shock and 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
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.
IMPORTANT
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.
2. Two clearance holes for #10 screws are provided for front
mounting.
Wiring
IMPORTANT The contacts in each switching element must have the same
polarity. The circuit diagram is shown on the nameplate.
The pressure type connector terminals in the base will accept No. 12 AWG and
smaller solid or stranded wire. For proper tightening, 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
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.
IMPORTANT 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 re-tighten the four screws (see Figure 1).
Figure 1
Lever Positioning
The lever on rotary actuated devices is adjustable to any position through 360°
around the shaft. Loosen the nut, move the lever to the desired position and
securely re-tighten the nut (see Figure 2).
Figure 2
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 the actuation direction, follow the steps below:
IMPORTANT
This procedure must be performed in a clean environment to
avoid the introduction of foreign material into the operating
mechanism.
Step 1: Loosen the four head mounting screws and remove the operating head
from the switch body.
Step 2: Locate the plunger on the underside of the operating 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 the Figure 3.
Step 4: Make sure the plunger is pushed back inward and the "O" ring is
properly seated before the operating head is reattached to the switch body.
Step 5: Securely re-tighten (approximately 1.35...2.03 N•m (12...18 lb•in) the
operating head mounting screws.
Step 6: Check for the desired actuation mode.
Figure 3
Renewal Parts
If renewal parts or additional lubricant is required, give the bulletin number,
catalog number, and series letter found on the nameplate.