Spectra Engineering RELM BK RADIO MXACU User manual

Automatic Base Station Changeover Unit

MXACU

Technical Manual

MXACU

RELM

Wireless

por

ion

7100 Technology

Drive

West Melbourne, FL

32904

Front Desk: (321)

984-1414

Sales: (800)

821-2900

Service: (800)

422-6281

www.RELM.com

Manual Revision 1.1.0 September 2006

In order to continually improve our products, Spectra Engineering Pty Ltd reserves

the right to alter, without notice and at any time, the equipment and specifications

described in this document.

All performance figures quoted are typical and are subject to normal manufacturing

and service tolerances.

The purchaser is warned that statements made in this document may be inaccurate

due to typographical or other errors or subsequent modifications of the product.

While every care has been taken in the creation of this document, no warranty of

accuracy or reliability is given, in any advice or information contained in this

document. The responsibility for any loss or damage whatsoever arising in any way

or any representation, act or omission whether express or implied (including

responsibility to any person by reason of negligence) is not accepted by Spectra

Engineering Pty Ltd or any director, officer, agent or employee of Spectra

Engineering Pty Ltd.

This work is copyright. Other than as permitted by Law, no part of it may be

reproduced, stored in a retrieval system or transmitted in any form or by any process

without prior written permission.

MXACU

Technical Manual

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Technical Manual

MXACU

Record Of Changes

Any changes to this manual are recorded on this list. Spectra Engineering

may issue replacement pages to you from time to time. If any updates are

issued, you will also receive a replacement for this page.

Date

Version

Chapter Changes

Pages Changed

Oct 2005

1.0

All - Initial Release

All

Sept 2006

1.1

Added network ID section

22, 23

MXACU

Technical Manual

SAFETY SUMMARY

Although there are no dangerous mains voltages present within the equipment, the

following general safety precautions as would normally apply, should be observed

during all phases of operation, service and repair of this equipment.

AROUND THE EQUIPMENT

To minimise any possible shock hazard from an external power supply or lightning

strike, the chassis or equipment cabinet must be connected to an electrical ground.

DO NOT OPERATE IN AN EXPLOSIVE ATMOSPHERE

Do not operate the equipment in the presence of flammable gases or fumes. Operation

of any electrical equipment in such an environment constitutes a definite safety hazard.

DO NOT SUBSTITUTE PARTS OR MODIFY THE EQUIPMENT

Because of the danger of introducing additional hazards, do not install substitute or

lower voltage parts to the equipment. Return to your authorised distributor.

WARRANTY CONDITIONS & PRECAUTIONS

The following conditions are not covered by the warranty of the MXACU. Please

ensure that the MXACU is not subject to;

1. Over voltage or Reverse Power Supply Voltage.

2. Operation in locations subject to abnormal environmental conditions such as

extreme temperatures or ingress of moisture.

Technical Manual

Table of Contents

Gen

1.1

eral Description

................................................................................

Overview

......................................................................................

1.2

Front Panel

...................................................................................

1.2.1 Front Panel

Indicators

....................................................

1.2.2 Front Panel Connector

...................................................

1.3

Rear Panel

..................................................................................

2. Installation and Operation

...................................................................

2.1

Installation

..................................................................................

2.1.1

Connections...................................................................

2.1.2 Power Supply

................................................................

2.1.3 RS232 A/B

Ports............................................................

2.1.4 Monitor A/B

Ports

.........................................................

2.1.5 Line IO A/B

Ports

..........................................................

2.1.6 Line I/O Common

Port

..................................................

2.1.7 2/4 Wire Base A/B

Ports................................................

2.1.8 2/4 Wire Common Port

.................................................

2.1.9 RF Connectors

..............................................................

2.1.10 Digital IO

Port..............................................................

2.2

Operation

....................................................................................

2.2.1 ACU Initial power

....................................................

2.2.2 Auto

mode......................................................................

2.2.3 Locked

Mode.................................................................

2.2.4 Switching between Auto and Locked

Mode

...................

2.2.5 Switching Base Radios

Manually

..................................

2.2.6 Serial Port Routing

.......................................................

2.2.7 Automatic Self

Test........................................................

2.2.8 Resetting Alarms

...........................................................

Rem

ote Control

.....................................................................................

3.1

Serial

Commands .......................................................................

3.2

Networked

Operation

.................................................................

3.2.1 Network

Commands ......................................................

4. Options

...................................................................................................

4.1 DTMF Remote control

operation

...............................................

4.2 PSTN

Modem.............................................................................

4.3 Ethernet

Port...............................................................................

5. Technical Description

...........................................................................

MXACU

Technical Manual

5.1 Power Supply

.............................................................................

5.2 Micro-controller Section

............................................................

5.3 RS232

Routing

...........................................................................

5.4 Real-time

Clock..........................................................................

5.5 RSSI Inputs

................................................................................

5.6 Relay

Drivers..............................................................................

5.7

DUART

......................................................................................

5.8 DTMF

Decoder ..........................................................................

5.9 Ethernet

Port...............................................................................

5.10 PSTN

Modem.............................................................................

Configuration.........................................................................................

6.1

Requirements..............................................................................

6.2 Entering Set-up Mode

................................................................

6.3 Configuration

...................................................................

6.3.1 Receiver

Parameters .....................................................

6.3.2 Hardware Logic

Parameters.........................................

6.3.3 Clock

Settings

................................................................

6.3.4 Serial Command ID

Setting...........................................

6.4 Diagnostic

Menu ........................................................................

7. Automatic tests

......................................................................................

7.1

Receiver......................................................................................

7.2

Transmitter .................................................................................

7.3 DC power

...................................................................................

7.4 Base Radio

Alarms

.....................................................................

7.5 Automatic

Scheduling

................................................................

Appendices.............................................................................................

8.1

Specifications .............................................................................

8.2 Drawings

....................................................................................

Technical Manual

Table of Contents

List of Tables

Table 1-1 LED Functions

...........................................................................................

Table 1-2 Rear Panel

Connections

...........................................................................

Table 2-1 Power Supply Connector

Pinout..............................................................

Table 2-2 RS232 A/B Connector

Pinout

...................................................................

Table 2-3 Monitor A/B Port

Pinout..........................................................................

Table 2-4 Line IO A/B Connector

Pinout.................................................................

Table 2-5 LineI/O Common Connector

Pinout.........................................................

Table 2-6 Base A/B Balanced Connector

Pinout.......................................................

Table 2-7 Common Balanced Connector

Pinout

.......................................................

Table 2-8 Digital I/O Connector

Pinout

...................................................................

Table 3-1 Serial Commands

.....................................................................................

Table 3-2 Network Serial

Commands

.......................................................................

Table 6-1 Serial Port Communication

Parameters ..................................................

Table 8-1 General Specifications

.............................................................................

Table 8-2

Drawings..................................................................................................

List of Figures

Figure 1-1 ACU Front

Panel......................................................................................

Figure 1-2 MX800 Rear Panel

.................................................................................

MXACU

Technical Manual

1. General Description

1.1 Overview

The MXACU Automatic Changeover Unit (ACU) is designed to allow

connection of two identical base radios, activating only one of the base

stations at one time in a active and standby configuration. It automatically

monitors and tests for fault conditions and switches operation to the healthiest

base station should a fault be detected.

The MXACU is a compact lightweight standard 19" rack mounting unit. It is

designed to mount horizontally in a 19" rack frame and occupies 2RU

(89mm). The depth of the unit is 330mm.

User interface is via the front and rear panels. The rear panel provides access

to all connectors and the front panel provides 8 LED indicators for the ACU

status and 4 pushbutton switches for manual operations.

1.2 Front Panel

The MXACU front panel is illustrated below.

RS232 Common

Port

Base A Select

Button

Base A Self Test

Button

Base A Active

Indicator

Base A Fault

Indicator

Base A Power

Indicator

Base A Status

Indicator

Base B Status Indicator

Base B Power Indicator

Base B Fault Indicator

Base B Active Indicator

Base B Self Test Button

Base B Select Button

Figure 1-1 ACU Front

Panel

Table of contents

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