User's Manual

Introduction

1 Introduction

This manual explains the hardware aspects of Adcon’s A733, A732, A731 and

A733GSM remote telemetry units (further referred to as A73x), including

installation issues and certain parameter configurations. The manual is divided as

follows:

• "Introduction", which gives some general information and document

conventions.

• "Using the A73x RTU", which details the installation and use of the remote

telemetry unit.

• "Performing Advanced Functions", which contains technical information for

the advanced user.

• "Specifications", which describes operating parameters for the devices.

1.1 About the A73x RTU family

The A73x family of Remote Telemetry Unit (RTU) consists of four types of low

power, telemetry devices, namely the A733, A732, A731 and the A733GSM (EU

and US). The following table gives an overview of the capabilities of these devices.

Analog Digital

Type inputs Inputs Outputs Serial

Interface

SDI-12

A731 0 0 0 Yes No

A732 6 4 (2 counters) 2 Yes Yes

A733 12 8 (4 counters) 4 Yes Yes

A733GSM 12 8 (4 counters) 4 Yes Yes

Both A733 are capable of sampling up to 12 analog and 8 digital inputs (of which 4

counter types); in addition, it can control up to 4 outputs. A 3 volt CMOS serial

interface is also built-in, allowing for configuration, data download, or expansion

(e.g. various bus implementations). Latest firmware (starting with version 2.0)