Telit Wireless Solutions LE51-868S DemoUnit User manual

LE51-868 S RF Module User
Guide
1VV0301131 Rev.0 – 2014-01-16

LE51-868 S RF Module User Guide
1VV0301131Rev.0 – 2014-01-16
Reproduction forbidden without written authorization from Telit Communications S.p.A. - All Rights
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APPLICABILITY TABLE
PRODUCT
LE51-868 S

LE51-868 S RF Module User Guide
1VV0301131Rev.0 – 2014-01-16
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SPECIFICATIONS SUBJECT TO CHANGE WITHOut Notice
Notice
While reasonable efforts have been made to assure the accuracy of this document, Telit
assumes no liability resulting from any inaccuracies or omissions in this document, or from
use of the information obtained herein. The information in this document has been carefully
checked and is believed to be entirely reliable. However, no responsibility is assumed for
inaccuracies or omissions. Telit reserves the right to make changes to any products described
herein and reserves the right to revise this document and to make changes from time to time
in content hereof with no obligation to notify any person of revisions or changes. Telit does
not assume any liability arising out of the application or use of any product, software, or
circuit described herein; neither does it convey license under its patent rights or the rights of
others.
It is possible that this publication may contain references to, or information about Telit
products (machines and programs), programming, or services that are not announced in your
country. Such references or information must not be construed to mean that Telit intends to
announce such Telit products, programming, or services in your country.
Copyrights
This instruction manual and the Telit products described in this instruction manual may be,
include or describe copyrighted Telit material, such as computer programs stored in
semiconductor memories or other media. Laws in the Italy and other countries preserve for
Telit and its licensors certain exclusive rights for copyrighted material, including the
exclusive right to copy, reproduce in any form, distribute and make derivative works of the
copyrighted material. Accordingly, any copyrighted material of Telit and its licensors
contained herein or in the Telit products described in this instruction manual may not be
copied, reproduced, distributed, merged or modified in any manner without the express
written permission of Telit. Furthermore, the purchase of Telit products shall not be deemed
to grant either directly or by implication, estoppel, or otherwise, any license under the
copyrights, patents or patent applications of Telit, as arises by operation of law in the sale of a
product.
Computer Software Copyrights
The Telit and 3rd Party supplied Software (SW) products described in this instruction manual
may include copyrighted Telit and other 3rd Party supplied computer programs stored in
semiconductor memories or other media. Laws in the Italy and other countries preserve for
Telit and other 3rd Party supplied SW certain exclusive rights for copyrighted computer
programs, including the exclusive right to copy or reproduce in any form the copyrighted
computer program. Accordingly, any copyrighted Telit or other 3rd Party supplied SW
computer programs contained in the Telit products described in this instruction manual may
not be copied (reverse engineered) or reproduced in any manner without the express written
permission of Telit or the 3rd Party SW supplier. Furthermore, the purchase of Telit products
shall not be deemed to grant either directly or by implication, estoppel, or otherwise, any
license under the copyrights, patents or patent applications of Telit or other 3rd Party supplied
SW, except for the normal non-exclusive, royalty free license to use that arises by operation
of law in the sale of a product.

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Usage and Disclosure Restrictions
License Agreements
The software described in this document is the property of Telit and its licensors. It is
furnished by express license agreement only and may be used only in accordance with the
terms of such an agreement.
Copyrighted Materials
Software and documentation are copyrighted materials. Making unauthorized copies is
prohibited by law. No part of the software or documentation may be reproduced, transmitted,
transcribed, stored in a retrieval system, or translated into any language or computer language,
in any form or by any means, without prior written permission of Telit
High Risk Materials
Components, units, or third-party products used in the product described herein are NOT
fault-tolerant and are NOT designed, manufactured, or intended for use as on-line control
equipment in the following hazardous environments requiring fail-safe controls: the operation
of Nuclear Facilities, Aircraft Navigation or Aircraft Communication Systems, Air Traffic
Control, Life Support, or Weapons Systems (High Risk Activities"). Telit and its supplier(s)
specifically disclaim any expressed or implied warranty of fitness for such High Risk
Activities.
Trademarks
TELIT and the Stylized T Logo are registered in Trademark Office. All other product or
service names are the property of their respective owners.
Copyright © Telit Communications S.p.A. 2011.

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Contents
1. Introduction ................................................. 7
1.1. Scope ..................................................... 7
1.2. Audience .................................................. 7
1.3. Contact Information, Support .............................. 7
1.4. Document Organization ..................................... 7
1.5. Text Conventions .......................................... 8
1.6. Related Documents ......................................... 9
2. Requirements ................................................ 10
2.1. General Requirements ..................................... 10
2.2. 868 MHz band Requirements ................................ 10
2.3. Other Requirements ....................................... 11
2.4. Functional Requirements .................................. 11
2.5. Software ................................................. 12
2.6. Temperature Requirements ................................. 12
3. General Characteristics ..................................... 13
3.1. Mechanical Characteristics ............................... 13
3.2. Mechanical dimensions .................................... 14
3.3. Recommended Land pattern ................................. 15
3.4. DC Characteristics ....................................... 15
3.5. LE51-868 S Functional Characteristics .................... 16
3.6. Digital Characteristic ................................... 18
3.7. Absolute Maximum Ratings ................................. 18
3.8. Ordering Information ..................................... 19
4. Technical Description ....................................... 21
4.1. Module Top View (cover side) ............................. 21
4.2. Pin-out of the module LE51-868 S ......................... 22
4.3. Pin-out of the DIP Interface ............................. 23
4.4. Pin-out correspondence table ............................. 24
4.5. Description of the signals ............................... 25

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5. Process Information ......................................... 26
5.1. Delivery ................................................. 26
5.2. Storage .................................................. 27
5.3. Soldering pad pattern .................................... 27
5.4. Solder past .............................................. 27
5.5. Placement ................................................ 28
5.6. Soldering Profile (RoHS Process) ......................... 28
6. Board Mounting Recommendation ............................... 30
6.1. Electrical environment ................................... 30
6.2. Power supply decoupling on LE51-868 S module ............. 30
6.3. RF layout considerations ................................. 31
6.4. Antenna connections on printed circuit boards ............ 32
6.5. LE51-868 S Interfacing ................................... 33
7. Safety Recommendations ...................................... 36
8. Glossary .................................................... 37
9. Document History ............................................ 38

LE51-868 S RF Module User Guide
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1. Introduction
1.1. Scope
Scope of this document is to present the features and the application of the Telit LE51-868 S
radio modules.
1.2. Audience
This document is intended for developers using Telit LE51-868 S radio modules.
1.3. Contact Information, Support
For general contact, technical support, to report documentation errors and to order manuals,
contact Telit Technical Support Center (TTSC) at:
[email protected]
[e-mail]
[e-mail]
[email protected]
Alternatively, use:
http://www.telit.com/en/products/technical-support-center/contact.php
For detailed information about where you can buy the Telit modules or for recommendations
on accessories and components visit:
http://www.telit.com
To register for product news and announcements or for product questions contact Telit
Technical Support Center (TTSC).
Our aim is to make this guide as helpful as possible. Keep us informed of your comments and
suggestions for improvements.
Telit appreciates feedback from the users of our information.
1.4. Document Organization
This document contains the following chapters
“Chapter 1: “Introduction” provides a scope for this document, target audience, contact and
support information, and text conventions.
“Chapter 2: “Requirements” gives an overview of the limitations imposed by Reference
standards.
“Chapter 3: “General Characteristics” describes in detail the characteristics of the product.

LE51-868 S RF Module User Guide
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“Chapter 4: “Technical Description” describes in detail the signals and pin-out of the product.
“Chapter 5: “Process information” describes in detail the delivery, storage, soldering and
placement of the product.
“Chapter 6: “Board Mounting Recommendations” describes in detail the interface and
coupling of the product.
“Chapter 8: “Glossary” shows acronyms used in the document.
“Chapter 9: “Document history” describes the revision history of the document.
1.5. Text Conventions
Danger – This information MUST be followed or catastrophic equipment failure or bodily
injury may occur.
Caution or Warning – Alerts the user to important points about integrating the module, if
these points are not followed, the module and end user equipment may fail or malfunction.
Tip or Information – Provides advice and suggestions that may be useful when
integrating the module.
All dates are in ISO 8601 format, i.e. YYYY-MM-DD.

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1.6. Related Documents
•[1] EN 300 220-2 v2.4.1, ETSI Standards for SRD , May 2012
•[2] ERC Rec 70-03, ERC Recommendation for SRD, October 2012
•[3] 2002/95/EC, Directive of the European Parliament and of the Council, 27 January 2003
•[4] SR Tool User Guide, 1vv0300899
•[5] 2006/771/EC, Harmonization of the radio spectrum for use by short-range devices
•[6] 2009/381/EC, Amending Decision 2006/771/EC on harmonization of the radio
spectrum for use by short-range devices
•[7] Sigfox Stand-Alone Module User Guide, 1vv0301109

LE51-868 S RF Module User Guide
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2. Requirements
2.1. General Requirements
The LE51-868 S module is a multi-channel radio board, delivering up to 35 mW in the 868
MHz ISM band (unlicensed frequency band).
It is delivered with preloaded protocol stack:
•LE51-868 S SIGFOX™ Network Software.
LE51-868 S is pin-to-pin compatible with LE, NE and ME modules working at different
frequencies.
LE51-868 S is also pin-to-pin compatible with Telit ZE Family (ZigBee 2007 and ZigBee
PRO stack).
2.2. 868 MHz band Requirements
The “ERC recommendation 70-03” describes the different usable sub-bands in the 868 MHz
license free band, in terms of bandwidth, maximum power, duty cycle and channel spacing.
LE51-868 S can operate on Annex 1, g1 band where “ERC recommendation 70-03” gives the
following limitations:
ERC recommendation 70-03
Band Frequency band
(MHz) Maximum radiated power (mW) Channel spacing (kHz) Duty cycle (%)
Annex 1 g1 868.0 – 868.6 25 No channel spacing specified 1
Band g3
869.400
–
869.650
500
25 kHz or the whole band
10
This band is free to use but the module and the user must respect some limitations. Most of
these restrictions are integrated in the conception of the module, except the duty cycle. For
example, the g1 sub-band from 868.000 to 868.600 MHz band is limited to a 1% duty cycle.
This means that each module is limited to a total transmit time of 36 seconds per hour. It is
the responsibility of the user to respect the duty cycle. Sigfox has also a limitation on this
band to ensure unsaturated network.
In order to fulfil the ETSI 70-03 specification requirement regarding duty cycle on ISM band
and to be aligned with Sigfox network management, each hour the application can send up to
72 Bytes (e.g., 6 messages of 12 bytes each).
Furthermore, the module complies with the ETSI 300-220-2 v2.3.1 standards (specific for
SRD) whose main requirements are described in Appendix 1.
Finally, the module complies with the European Directive 2002/95/EC concerning the
Restrictive Usage of Hazardous Substances (RoHS).