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AR500

AR500 Laser Position Sensors

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1. Introduction

This section is a guide to getting started with the AR500 and this manual. The

AR500 has a number of configurable parameters, but many applications can use

the sensor in its default factory configuration. This manual contains information

for a variety of AR500 sensor configurations that can be ordered from Acuity.

Your specific AR500 model may not have all interfaces and functions described

in this manual.

The recommended order for reading the manual is:

General Overview – Gives a brief understanding of the sensor operation.

Operating Guidelines – Provides a few important safety tips.

Definition of Terms – An aid for proper communication.

Quick Start Instructions – This should provide the information necessary

to connect the sensor and verify its operation, either with a serial terminal

program at 9600 baud, or by connecting the current loop or Alarm Output

interface.

General Description – Gives important laser, operation, mechanical, and

mounting information.

Installation and Checkout – Tailor the application. Use the other chapters

for reference:

Signal and Power Interface – how to hook everything up

Serial Interface Operation – modes, formats, bias

Analog Output Operation – current loop, voltage, scaling

Alarm Output Operation – alarm settings

Performance Optimization – Sample Rate, Background Elimination,

Exposure control

AR500 Command Set – explains all commands for customizing the

application

1.1 General Overview

The AR500 is a triangulation sensor that measures distance using a laser

beam, a camera, and a microprocessor. A variety of models are specified,

each to allow a different measurement range, communications interface,

laser power and environmental options. Models vary in range from 5 to 1000

mm. Interface options include RS232, RS485, 4-20mA, 0-10V and Ethernet.

Sensors can be optionally ordered with an internal heater or air cooling

jacket.

The accuracy is generally specified with a linearity of about +/- 0.15% of the

range.

A variety of configuration settings can be selected via the serial port or

Ethernet interface (option). The complete list of settings is found in the

AR700 Command Set chapter and each setting is discussed in detail in a

specific operation chapter.

The Sample Rate can be specified and the sensor has capability above 9400

samples per second. Several other configurable parameters enhance the

AR500 User’s Manual

LLL00xxxx – Rev 1.0

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