Installation Instructions
Original Instructions
Direct Opening Action Limit Switch
Bulletin Number 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
Bulletin 802T Direct Opening Action limit switches are designed for use in
applications requiring control-reliability performance per ANSI B11.19 and in safety
applications as shown in ISO 14119.
Limit switches are used in electrical control systems to sense position. The
predetermined motion of a cam, machine component, or piece part can actuate
these limit switches. They are suitable for use in control systems requiring controlreliability performance or safety-related performance per ISO 13849–1.
Attribute
Value
Safety contacts
1 normally closed
Auxiliary contacts
1 normally open
Enclosure rating
NEMA 4, 6P, 12, and 13
IP67
Operation rate and speed (1)
Lever type
150/minute at 9 m (30 ft)/minute (2)
Top push roller
150/minute at 9 m (30 ft)/minute (3)
Side push roller
150/minute at 9 m (30 ft)/minute (3)
Operating temperature (standard models)
18…110 °C (0…230 °F)
Short circuit protection
10 A slow or 15 A fast acting. Size the overload
protection to load requirements.
(1)
(2)
(3)
Figure 1 - Typical Example of a Dual Channel Safety Application
Positive Mode
Operation
Negative Mode
Operation
Specifications
Guard Closed
To Safety-related Part of the
Machine Control System
Before installation in a safety application, you must perform a risk assessment to
determine whether the specifications of this device are suitable for foreseeable
operational and environmental characteristics of the machine that is to be
controlled. Only the normally closed set of contacts are considered safety
contacts. When applying these limit switches in a safety system application, you
must follow all applicable standards for application. You must follow operation
specifications and displace the actuator beyond the point where direct opening
action occurs. These devices are not to be used to control a motor directly.
ATTENTION: Adjustable length lever actuators must not be
used in a safety systems application.
Based on operation temperatures of 20…30 °C (68…86 °F).
Using 802T-W1A operating lever.
Using 30° non-overtravel dog.
Mounting
You must securely mount the limit switches using the mounting holes provided.
During installation, confirm that the actuator is displaced beyond the point where
direct opening action takes place. Adjustable levers or rod actuators must not be
used in safety systems applications.
Description
Tightening Torque
Terminal Screws
2.03 N•m (18 lb•in)
Front to Rear Base
1.81…2.26 N•m (16…20 lb•in)
Head Screws
1.35…2.03 N•m (12…18 lb•in)
Lever Arm
2.82…4.07 N•m (25…36 lb•in)
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 accept 4 mm2 (12 AWG) and
smaller solid or stranded wire. For proper tightening, it is suggested that you do
not use wire any smaller than 0.75 mm2 (18 AWG). Before inserting the wire under
the pressure plates, strip the insulation approximately 9.23 mm (0.375 in.) Tighten
all pressure plate terminals whether used or not, to avoid interference with the
switch cover.
After wiring is complete, check that all wires are in the wiring cavity of the terminal
block so they do not interfere with the switch when it is plugged into the terminal
block.
Recheck all wiring terminal screws for tightness.
To change the actuation direction, follow these steps:
IMPORTANT
•
•
•
•
For switches that have been wired at the factory,
check wire colors and their positions in the terminal
block for proper circuit hookup.
IMPORTANT
Grounding of the switch must be achieved per National Electric Code
(NFPA 70) requirements. The grounding terminal is in the terminal block
housing.
Arrange control wiring according to terminal markings.
Tighten terminal screws according to specifications.
Only use insulated connectors.
1.
2.
3.
You must perform this procedure in a clean
environment to avoid the introduction of foreign
material into the operating mechanism.
Loosen the four head mounting screws and remove the operating head
from the switch body.
Locate the plunger on the underside of the operating head.
Pull the plunger outward and rotate it in steps of 90° to provide the
operating mode desired.
Plunger
Setting
Actuator Head Positioning
The actuator head can be placed in any of four positions on
the switch body.
1.
2.
3.
Actuation
Required
Loosen the four captive screws.
Place the head in the desired position.
Securely retighten the four screws.
CCW Only
4.
Lever Positioning
The lever on rotary actuated devices is
adjustable to any position through 360°
around the shaft.
1.
2.
3.
5.
6.
Lock Pin
Nut
CW and CCW
CW Only
Make sure that the plunger is pushed back inward and the O-ring is
properly seated before reattaching the operating head to the switch body.
Securely retighten the operating head mounting screws.
Check for the desired actuation mode.
Methods of Actuation Examples
Loosen the nut.
Move the lever to the desired
position.
Securely retighten the nut.
802T-DPD
Top Push Roller
30° Non-overtravel Dog
Changing the Direction of
Actuation
The switch action of lever-operated limit switches can be adjusted to operate with
the shaft moving in either a clockwise or counterclockwise direction, or in both
directions.
802T-KPD
Side Push Roller
30° Non-overtravel Dog
802T-APD, 802T-W1A
38.1 mm (1.5 in.) Long
90° Non-overtravel Dog
V max = 9.1 m (30 ft)/min at Actuator
F max = 150 cpm
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 802T-IN012A-EN-P - August 2021 | Supersedes Publication xxxx-INxxxx-EN-P- Month Year
Copyright © 2021 Rockwell Automation, Inc. All rights reserved. Printed in the U.S.A.
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