Telit Wireless Solutions xE50-868 series User manual

xE50-868 RF Module User Guide
1VV0300905 Rev.14 – 2018-01-2503-16

xE50-433/868 RF Module User Guide
1VV0300905 Rev.14 – 2018-103-16
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APPLICABILITY TABLE
PRODUCT
LE50-868
ME50-868

xE50-433/868 RF Module User Guide
1VV0300905 Rev.14 – 2018-103-16
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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.

xE50-433/868 RF Module User Guide
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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 ..............................8
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 ...................................12
2.4. Functional Requirements .........................12
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 ....................14
3.4. DC Characteristics...................................... 15
3.5. LE50-868 Functional Characteristics .16
3.6. ME50-868 Functional Characteristics 19
3.7. Digital Characteristic ................................ 22
3.8. Absolute Maximum Ratings.................... 22
3.9. Ordering Information ............................... 23
4. Technical Description ..................................... 25
4.1. Module Top View (cover side) ................. 25
4.2. Pin-out of the module LE50-868 ........... 26
4.3. Pin-out of the module ME50-868 ...........27
4.4. Pin-out of the DIP Module........................ 28

xE50-433/868 RF Module User Guide
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4.5. Description of the signals ......................... 29
5. Process Information ....................................... 30
5.1. Delivery ........................................................ 30
5.2. Storage............................................................ 31
5.3. Moisture sensibility .................................... 31
5.4. Additional Precautions.............................. 31
5.5. Soldering pad pattern ................................. 31
5.6. Solder paste .................................................. 32
5.7. PCB pad design ........................................... 33
5.8. PCB pad dimensions ................................. 33
5.9. Placement ..................................................... 34
5.10. Soldering Profile (RoHS Process) ...... 34
6. Board Mounting Recommendation ............. 36
6.1. Electrical environment............................. 36
6.2. Power supply decoupling on xE50-868
module...................................................................... 36
6.3. RF layout considerations ..........................37
6.4. Antenna requirements .............................. 38
Antenna connections on printed circuit boards
38
6.5.............................................................................. 38
6.6. xE50-868 Interfacing .............................. 40
7. Annexes .............................................................. 41
7.1. Examples of propagation attenuation......41
7.2. EU Declaration of conformity ................ 42
7.3. Safety Recommendations ........................ 42
8. Glossary ............................................................. 43
9. Document History ...........................................44
1.

xE50-433/868 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 xE50-868
radio modules (LE50-868 and ME50-868).
1.2. Audience
This document is intended for developers using Telit xE50-868 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:
TS-[email protected]
TS-[email protected]
TS-[email protected]
TS-[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.

xE50-433/868 RF Module User Guide
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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.
“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 7: “Annexes” describes examples of propagation attenuation.
“Chapter 8: “Safety Recommendations” describes recommendation for proper usage.
“Chapter 9: “Glossary”shows acronyms used in the document.
“Chapter 10: “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.

xE50-433/868 RF Module User Guide
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1.6. Related Documents
•[1] EN 300 220-1, EN 300 220-2 v3.1.1, ETSI Standards for SRD,
•[2] ERC Rec 70-03 version of 13 October 2017
•[3] RoHS 2 Directive 2011/65/EU
•[4] SR Tool User Guide, 1vv0300899
•[5] 2011/829/EU,, 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] Star Network Protocol Stack User Guide, 1vv0300873
•[11] EN 13757-4: 2013 Wireless M-Bus
•[12] Telit_Wireless_M-bus_2013_Part4_User_Guide 1vv0300953

xE50-433/868 RF Module User Guide
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2. Requirements
2.1. General Requirements
The LE50-868 and ME50-868 (or simply xE50-868) modules are multi-band radio boards,
delivering up to 25 mW in the 868 MHz ISM band (unlicensed frequency band).
They are delivered with preloaded protocol stacks:
•LE50-868: “Star Network” Protocol stack
•ME50-868: “Wireless M-Bus Part4:2013” Protocol stack.
LE50-868 and ME50-868 are pin-to-pin compatible with LE and ME modules working at
different frequencies.
LE50-868 and ME50-868 are also pin-to-pin compatible with Telit ZE Family (ZigBee PRO
stack).
2.2. 868 MHz band
Requirements
The “ERC recommendation 70-03” describes also the different usable sub-bands in the 868
MHz license free band, in terms of bandwidth, maximum power, duty cycle and channel
spacing. LE50-868/ME50-868 can operate on Annex 1 bands 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
(%)
Annex1 g
863.0 – 870.0
25
=< 100 for 47 or more channels
100
Annex1 g1
868.0 – 868.6
25
No channel spacing specified
1
Annex1 g2
868.7 - 869.2
25
No channel spacing specified
0,1
Annex1g3
869.4 - 869.65
500
25 (for 1 or more channels)
10
Annex1g4
869.7 – 870.0
5
No channel spacing specified
100
These bands are 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 869.400 to 869.650 MHz band is limited to a 10% duty cycle. This means that
each module is limited to a total transmit time of 6 minutes per hour.