Allen-Bradley 802T - User Manual

Installation Instructions
Original Instructions
Four-Circuit Direct Opening Action Limit Switch
Catalog Numbers 802T
Overview
Bulletin 802T Direct Opening Action limit switches have been
designed for use in applications requiring control reliability
performance per ANSI B11.19 and in safety applications
Limit switches are used in electrical control systems to sense position.
They are actuated by the predetermined motion of a cam, machine
component or piece part. These limit switches are suitable for use in
control systems requiring control reliability performance or safety
related performance per ISO 13849–1.
Typical Example of a Dual Channel Safety Application
Before installation in a safety application, a risk assessment should be
performed to determine whether the specifications of this device are
suitable for foreseeable operational and environmental characteristics
of the machine which 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, all applicable standards for
application should be followed. Operating specifications must be
followed and actuator must be displaced beyond the point where
Direct Opening Action occurs. These devices are not to be used to
directly control a motor.
General Data
• Safety Contacts: 2 Normally Closed
• Auxiliary Contacts: 2 Normally Open
• Enclosure Rating:
• NEMA 4, 6P, 12, and 13
•IP67
•
Operating rate and speed
1
• Lever Type: 150/minute @ 9 m (30 ft)/minute
2
• Top Push Roller: 150/minute @ 9 m (30 ft)/minute
3
• Side Push Roller: 150/minute @ 9 m (30 ft)/minute
3
• Operating temperature (standard models) 18…110°C
(0…230°F)
• Short Circuit Protection: 10 amp slow or 15 amp fast acting.
Overload protection should be sized to load requirements.
Mounting
Limit switches should be securely mounted using the mounting holes
provided. During installation, ensure that the actuator will be displaced
beyond the point where Direct Opening Action takes place. Adjustable
levers or rod actuators should not be used in safety systems
applications.
1
Based on operation temperatures of 20…30°C (68…86°F).
2
Using 802T-W1A operating lever.
3
Using 30° non-overtravel dog.
Wiring
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.
AT TEN T ION: 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.
ATTENTION : Adjustable length lever actuators should not be used
in a safety systems application.
1
2
5
6
3
4
7
8
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)
IMPORTANT The contacts in each switching element must have the same
polarity. The circuit diagram is shown on the nameplate.

Summary

General Data

Safety Contacts

Specifies 2 Normally Closed safety contacts for reliable control.

Auxiliary Contacts

Specifies 2 Normally Open auxiliary contacts for signaling.

Enclosure Rating

Details NEMA 4, 6P, 12, 13 and IP67 enclosure ratings.

Operating Rate and Speed

Defines operating rate and speed for lever and roller types.

Operating Temperature

Specifies operating temperature range for standard models.

Short Circuit Protection

Details 10 amp slow or 15 amp fast acting protection requirements.

Overview

Dual Channel Safety Application Example

Illustrates a dual channel safety application with guard closed status.

Mounting and Wiring

Mounting Instructions

Ensure secure mounting and actuator displacement beyond direct opening point.

Tightening Torque Specifications

Specifies tightening torque values for terminal screws, base, head, and lever.

Wiring Notes

Emphasizes contact polarity, terminal numbering, and wire handling.

Changing Direction of Actuation

Actuation Adjustment Procedure

Steps to adjust switch action for clockwise, counterclockwise, or both directions.

Plunger Operation

Details locating, pulling, and rotating the plunger to set operating mode.

Head Reattachment

Ensures plunger and O-ring are properly seated before reattaching the head.

Actuator and Lever Positioning

Actuator Head Positioning

Instructions for placing the actuator head in one of four positions.

Lever Positioning

Guide to adjusting the lever on rotary actuated devices through 360°.

Methods of Actuation Examples

Actuation Types

Examples of different actuation methods and their specifications.

Allen-Bradley 802T Specifications

General

Brand	Allen-Bradley
Model	802T
Category	Switch
Language	English