DSP 9612 User Manual

DSP 9612 Flash Poll Modem

User’s Guide

0049−0117−000 Rev. B

Page iii

Contents

CHAPTER 1 INTRODUCTION

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5

F

EATURES

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6

A

PPLICATIONS

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7

CHAPTER 2 INSTALLATION

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9

U

NPACKING YOUR HARDWARE

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9

A

DDITIONAL ITEMS YOU NEED

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9

H

ARDWARE OVERVIEW

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Back View

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10

Front View

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I

NSTALLATION SUMMARY

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12

F

INDING A SUITABLE LOCATION

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12

C

ONFIGURING THE MODEM

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12

High-Speed (Fast Poll) Mode

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13

Low-Speed (FSK) Mode

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18

C

ONNECTING TO A TRANSMISSION LINE

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23

C

ONNECTING TO A VOLTAGE SOURCE

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25

C

ONNECTING AN

RS-232 D

EVICE

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26

LED

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26

L

OOPBACK CONTROL SWITCH

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APPENDIX A TROUBLESHOOTING

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29

P

ROBLEM SOLVING

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APPENDIX B SPECIFICATIONS

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G

ENERAL SPECIFICATIONS

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31

M

ECHANICAL SPECIFICATIONS

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32

I

NTERFACE CONNECTOR PIN ASSIGNMENTS

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RS-232 (RTU) Interface

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34

E

NVIRONMENTAL SPECIFICATIONS

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C

OMPLIANCES

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APPENDIX C COMPLIANCES

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APPENDIX D LIMITED PRODUCT WARRANTY

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APPENDIX E RMA PROCEDURE

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Contents

Page iv

N

OTES

Page 5

Chapter 1

Introduction

ongratulations for purchasing the finest industrial-grade fast­poll modem available.

The DSP9612 (Flash Poll) modem is a 9600/4800/0­1800 bps modem designed for 4-wire, full-duplex or 2-wire, half­duplex operation over a voice-band leased line. The modem is designed
utilizing the latest digital-signal processing (DSP) technology to
achieve high performance. The modem employs proprietary
modulation and encoding scheme to achieve fast modem training time.
The modem is also backward compatible with Bell 202 modems.

The DSP9612 modem is ideally suited for multi-point communication
systems that require fast response time, short training time, and low
throughput delay. The DSP9612 is the most technologically advanced
modem on the market.

This User’s Guide is designed to let you get your modem “up and
running” as quickly as possible. It contains all the information you
need to configure and install your modem. It also contains
troubleshooting information in the unlikely event you encounter a
problem with your modem.

C

Introduction

Page 6

Features

The DSP9612 modem is specifically designed for harsh environments
found in utility substations and industrial facilities. Though
functionally similar to commercial modems, the DSP9612 provides the
following unique features that make it well suited for utility and
industrial applications.

c

Packaged in a rugged, compact enclosure for industrial
applications.

c

Leased-line interface protected with heavy-duty surge protection
hardware (15KV).

c

Requires no human intervention, making it ideal for unmanned
locations.

c

Works within an extended temperature range of -40ºC to +85ºC.

c

Designed with coupling transformers for high-voltage isolation
and common mode noise rejection in industrial and commercial
environments.

c

Operate over voice-band conditioned or unconditioned leased line
and pilot wires.

c

Accepts power from a wide range of AC and DC power supplies.

c

Standard industrial connectors for data, analog, and power
interfaces allow reliable interconnection to other industrial
equipment.

c

Asynchronous data rates (selectable) of 9600, 4800, and 0-1800
bps.

c

Easily accessible DIP switches for user configuration and option
selection.

c

DB25 connector for RS-232/V.24 interface.

c

Local analog, local digital, and remote digital loopback
diagnostics.

Applications

Page 7

Applications

The DSP9612 modem is designed for point-to-point and multipoint
data communications. Figure 1-1 shows a typical multipoint
configuration.

Figure 1-1. Network of Multipoint Configuration

There are a number of factors that can affect the network’s and
modem’s operation and performance. These include:

c

Operating speed

c

2-wire or 4-wire configuration

c

Transmission line characteristics, noise, and line impairments

c

Network configuration (point-to-point or multipoint)

c

Number of nodes on the network

Introduction

Page 8

N

OTES

Page 9

Chapter 2

Installation

his chapter describes how to install the modem.

Unpacking Your Hardware

Your package should include:

c

At least one DSP9612FP modem

c

A leased-line cable

c

This User’s Guide

If your package contents are damaged or missing, please contact your
place of purchase immediately.

Additional Items You Need

To use your modem, you need the following additional items:

c

Two- or four-wire transmission line or leased line

c

A power supply that provides either:

−

85 to 265 Volts AC, 50 to 60 Hz, single phase (AC
version), or

−

10 to 53 Volts DC (DC version)

T

Installation

Page 10

Hardware Overview

Back View

Figure 2-1 shows the back view of the DSP9612FP modem. Starting
from the left side, this view shows:

c

A 4-wire/2-wire configuration block. See page 23.

c

A female, 25-pin RS-232 connector, for connecting a standard
DTE (RTU). See page 26.

c

A POWER ON/OFF switch.

c

A power connector. See page 25.

Figure 2-1. Back View of Modem

BackVie

w

Power Source

Power Switch

DTE Connection

Leased Line

Hardware Overview

Page 11

Front View

Figure 2-2 shows the front view of the modem. Starting from the left
side, this view shows:

c

A set of nine LEDs. See page 26.

c

A loopback test switch. See page 27.

Figure 2-2. Front View of Modem

Installation

Page 12

Installation Summary

The modem installation involves the following steps:

1.

Finding a suitable location for the modem. See the section below.

2.

Configuring the modem. See page 12.

3.

Connecting to a transmission line. See page 18.

4.

Connecting to a voltage source. See page 25.

5.

Connecting a DTE device. See page 26.

Finding a Suitable Location

The location you select should provide easy access to the back panel
communications interface(s) and front panel power interface. It should
also let you view the red LED on the front panel.

Configuring the Modem

You configure the modem using the two sets of DIP switches on the
bottom of the modem front panel. The switches can have one of two
functions, depending on how switch SW2-1 is set.

c

Setting switch SW2-1 to OFF configures the modem for high­speed (Fast Poll) mode. In this mode, the switches correspond to
the functions in Table 2-1 (see page 13).

c

Setting switch SW2-1 to ON configures the modem for low-speed
(FSK) mode. In this mode, the switches correspond to the
functions in Table 2-3 (see page 18).

Configuring the Modem

Page 13

High-Speed (Fast Poll) Mode

Table 2-1 shows the modem switch settings that can be used when the
modem is configured for high-speed (Fast Poll) mode. This mode is
enabled when switch SW2-1 is set to OFF. Following this table is an
explanation of these settings.

Table 2-1. Modem Switch Settings for High-Speed Mode

Switch SettingsSwitches

ON OFF (Default)

SW 1-1 − 1-4: Transmit Level (page 14)

(see Table 2-2 on page 14)

SW 1-5: Receiver Dynamic Range
(page 15)

−

10 to −43 dBm +3 to −30 dBm

SW 1-6: TX Cable Equalizer (page 15) Enabled Disabled

SW 1-7: RX Cable Equalizer (page 15) Enabled Disabled

SW 1-8: Anti-streaming (page 15) Active Inactive

SW 2-1: High-Speed/Low-Speed Mode
(page 16)

Low-Speed Mode
(FSK)

High-Speed Mode
(Fast Poll)

SW 2-2: Data Rate in Fast Poll Mode 4800 bps 9600 bps

SW 2-3: Async Character 11 bits 10 bits

SW 2-4: Auto RTS (page 16) Enabled Disabled

SW2-5: Reserved

SW 2-6: Production Test Only (page 16)

Test Normal

SW 2-7: 2- or 4-wire (page 16) 2-wire, half-

duplex

4-wire, full-duplex

SW 2-8: Carrier Control (page 17) Constant Switched

SW 2-9: Rx Termination (page17) Disabled Enabled

SW 2-10: Ground Options Connected Disconnected

Installation

Page 14

SW1-1 through SW1-4 − Transmit Level (high- & low-speed modes)

Switches SW1-1 through SW1-4 adjust the modem’s transmit level.
Table 2-2 shows the transmit levels you can select using these
switches.

Table 2-2. Transmit Levels (High-Speed and Low-Speed Modes)

SW1 through SW4 Switch Settings

Transmit Level

SW1-1 SW1-2 SW1-3 SW1-4

0 dBm OFF OFF OFF OFF

−

1 dBm

OFF OFF OFF ON

−

2 dBm

OFF OFF ON OFF

−

3 dBm

OFF OFF ON ON

−

4 dBm

OFF ON OFF OFF

−

5 dBm

OFF ON OFF ON

−

6 dBm

OFF ON ON OFF

−

7 dBm

OFF ON ON ON

−

8 dBm

ON OFF OFF OFF

−

9 dBm

ON OFF OFF ON

−

10 dBm

ON OFF ON OFF

−

11 dBm

ON OFF ON ON

−

12 dBm

ON ON OFF OFF

−

13 dBm

ON ON OFF ON

−

14 dBm

ON ON ON OFF

+3 dBm ON ON ON ON