Vaisala DXL421 Manuale utente
Leased Line Modem
DXL421
USER'S GUIDE
M210636EN-B
February 2005
PUBLISHED BY
Vaisala Oyj Phone (int.): +358 9 8949 1
P.O. Box 26 Fax: +358 9 8949 2227
FIN-00421 Helsinki
Finland
Visit our Internet pages at http://www.vaisala.com/
© Vaisala 2005
No part of this manual may be reproduced in any form or by any means,
electronic or mechanical (including photocopying), nor may its contents be
communicated to a third party without prior written permission of the copyright
holder.
The contents are subject to change without prior notice.
Please observe that this manual does not create any legally binding obligations for
Vaisala towards the customer or end user. All legally binding commitments and
agreements are included exclusively in the applicable supply contract or
Conditions of Sale.
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VAISALA_________________________________________________________________________ 1
Table of Contents
CHAPTER 1
GENERAL INFORMATION............................................................................ 3
About This Manual ................................................................... 3
Contents of This Manual ....................................................... 3
Safety......................................................................................... 4
General Safety Considerations ............................................. 4
ESD Protection...................................................................... 4
Warranty .................................................................................... 5
CHAPTER 2
PRODUCT OVERVIEW.................................................................................. 7
Introduction to DXL421............................................................ 7
Assembly................................................................................... 7
CHAPTER 3
OPERATION................................................................................................... 9
Installation................................................................................. 9
Mode Settings......................................................................... 10
Operator Commands.............................................................. 11
Point-to-point.......................................................................... 13
Application, DXL421 and ROSA in 2/4-wire point-to-point
Operation............................................................................. 13
Multi-point ............................................................................... 14
Application, DXL421 and ROSA in 2-wire Multi-point
Operation............................................................................. 14
CHAPTER 4
CONTACT INFORMATION .......................................................................... 15
Technical Support .................................................................. 15
Return Instructions ................................................................ 15
CHAPTER 5
TECHNICAL DATA ...................................................................................... 17
Specifications ......................................................................... 17
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List of Figures
Figure 1 DXL421 Leased Line Modem .....................................................8
Figure 2 DXL421 and Terminal.................................................................9
Figure 3 Mode Settings...........................................................................11
Figure 4 DXL421 and ROSA in Leased Line 2-wire Poin-to-point..........13
Figure 5 DXL421 and ROSA in Leased Line 4-wire Point-to-point.........13
Figure 6 DXL421 and ROSA in Leased Line Multi-point ........................14
List of Tables
Table 1 DIL Switch Positions .................................................................10
Table 2 Jumpers X5, X6 and X7............................................................10
Table 3 Carrier Levels ...........................................................................12
Table 4 Power Input...............................................................................17
Table 5 Serial RS-232 Interface ............................................................17
Table 6 PSTN Interfase .........................................................................17
Table 7 Mechanical................................................................................18
Table 8 Environmental...........................................................................18
Chapter 1 _________________________________________________________ General Information
VAISALA_________________________________________________________________________ 3
CHAPTER 1
GENERAL INFORMATION
This chapter provides general notes for the product.
About This Manual
This manual provides information for installing, operating, and
DXL421 Leased Line Modem.
Contents of This Manual
This manual consists of the following chapters:
- Chapter 1, General Information, provides general notes for the
product.
- Chapter 2, Product Overview, introduces the features, advantages
of the product.
- Chapter 3, Operation, contains information that is needed to
operate this product.
- Chapter 4, Contact Information, describes contact information.
- Chapter 5, Technical Data, provides the technical data of DXL421
modem.
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Safety
General Safety Considerations
Throughout the manual, important safety considerations are
highlighted as follows:
WARNING Warning alerts you to a serious hazard. If you do not read and follow
instructions very carefully at this point, there is a risk of injury or
even death.
CAUTION Caution warns you of a potential hazard. If you do not read and
follow instructions carefully at this point, the product could be
damaged or important data could be lost.
NOTE Note highlights important information on using the product.
ESD Protection
Electrostatic Discharge (ESD) can cause immediate or latent damage
to electronic circuits. Vaisala products are adequately protected
against ESD for their intended use. However, it is possible to damage
the product by delivering electrostatic discharges when touching,
removing, or inserting any objects inside the equipment housing.
To make sure you are not delivering high static voltages yourself:
- Handle ESD sensitive components on a properly grounded and
protected ESD workbench. When this is not possible, ground
yourself to the equipment chassis before touching the boards.
Ground yourself with a wrist strap and a resistive connection cord.
When neither of the above is possible, touch a conductive part of
the equipment chassis with your other hand before touching the
boards.
- Always hold the boards by the edges and avoid touching the
component contacts.
Chapter 1 _________________________________________________________ General Information
VAISALA_________________________________________________________________________ 5
Warranty
For certain products Vaisala normally gives a limited one-year
warranty. Please observe that any such warranty may not be valid in
case of damage due to normal wear and tear, exceptional operating
conditions, negligent handling or installation, or unauthorized
modifications. Please see the applicable supply contract or Conditions
of Sale for details of the warranty for each product.
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Chapter 2 ___________________________________________________________ Product Overview
VAISALA_________________________________________________________________________ 7
CHAPTER 2
PRODUCT OVERVIEW
This chapter introduces the features, advantages of the product.
Introduction to DXL421
The DXL421 is a leased line modem for the weather stations and other
systems. The operation mode and settings are selectable with the DIL
switch and jumpers. The DXL421 can be used to connect the weather
station to the leased line 2- or 4-wire point-to-point or multi-point
application.
The DXL421 supports standards such as V.21 300 / 300 bps FSK,
V.22 1200 / 1200 DPSK and V.23 1200 /1200 bps FSK.
Assembly
The DXL421 unit has a small enclosure of 20 mm x 80 mm x 76 mm
with DIN rail mounting support that can be connected into various
enclosures. The DXL421 has face connectors where the power supply,
RS-232 and leased line can be connected.
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0410-169
Figure 1 DXL421 Leased Line Modem
The following numbers refer to Figure 1 above:
1 = DIL switch
2 = Power input
3 = RS-232 interface
4 = Leased line interface
Indice
