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
Reserved. Page 2 of 38
APPLICABILITY TABLE
PRODUCT
LE51-868 S

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
Reserved. Page 3 of 38
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.

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
Reserved. Page 4 of 38
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.

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
Reserved. Page 5 of 38
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

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
Reserved. Page 6 of 38
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
1VV0301131Rev.0 – 2014-01-16
Reproduction forbidden without written authorization from Telit Communications S.p.A. - All Rights
Reserved. Page 7 of 38
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
1VV0301131Rev.0 – 2014-01-16
Reproduction forbidden without written authorization from Telit Communications S.p.A. - All Rights
Reserved. Page 8 of 38
“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.

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
Reserved. Page 9 of 38
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
1VV0301131Rev.0 – 2014-01-16
Reproduction forbidden without written authorization from Telit Communications S.p.A. - All Rights
Reserved. Page 10 of 38
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).

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
Reserved. Page 11 of 38
National Restrictions for non specific SR devices Annex 1 band g1-g4:
Country
Restriction
Reason/Remark
Band G
Austria Not Implemented Planned
Finland Limited Implementation Audio, video and voice not allowed -
Planned 2011
Georgia Not Implemented
Spain
Limited implementation
to the band 863
-
868 MHz
Sweden Not Implemented
The Netherlands
Not Implemented
Under stu
dy
Ukraine Limited implementation 863-865 / 868-868.6 / 868.6-868.7 /
869.2-869.25 MHz
Band G1
Georgia Not Implemented
Russian
Federation Not Implemented
Ukraine Not Implemented e.i.r.p. ≤25 mW
2.3. Other Requirements
The module complies with the European Directive 2002/95/EC concerning the Restrictive
Usage of Hazardous Substances (RoHS).
2.4. Functional Requirements
The LE51-868 S module is a complete solution from serial interface to RF interface. The
LE51-868 module has a digital part and a RF part. The radio link on Sigfox network is a
mono-directional link, since RX features are not required to be compliant with the network
protocol.
The digital part has the following functionalities:
•Communication interface
•I/O management
•Micro controller with embedded Telit Software Stack supporting Sigfox protocol
The RF part has the following functionalities:
•Frequency synthesis
•Front-end
•Power amplification

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
Reserved. Page 12 of 38
•Packet handling
2.5. Software
The LE51-868 S module is provided pre-flashed with one of the available Telit in-house
Protocol Stack.
Please refer to Protocol Stack User Guide [7] for detailed information.
2.6. Temperature Requirements
Minimum Typical Maximum Unit
Operating
Temperature - 40 25 + 85 °C
Relative humidity @
25°C 20 75 %
Storage
Temperature - 40 25 + 85 °C

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
Reserved. Page 13 of 38
3. General Characteristics
3.1. Mechanical Characteristics
Size : Rectangular 25.8 x 15 mm
Height : 3 mm
Weight : 1.7 g
PCB thickness: 0.8 mm
Cover* : •Dimensions : 25 x 14.2 x 2.2mm
•Thickness : 200µm
Components : All SMD components, on one side of the PCB.
Connectors : The terminals allowing conveying I/O signals are LGA
Mounting : •SMD
•LGA on the 4 external sides
Number of pins : 30
*: The metallic shield used on LE51-868 S covers all the SMD components

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
Reserved. Page 14 of 38
3.2. Mechanical dimensions

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
Reserved. Page 15 of 38
3.3. Recommended Land pattern
3.4. DC Characteristics
Measured on DIP interface with T = 25°C, Vdd = 3V, 50Ωimpedance and default power
register setting if nothing else noted.
Max limits apply over the entire operating range, T=-40°C to +85°C, Vdd=2V to 3.6V and all
channels.
Characteristics LE51-868 S Min. Typ. Max.
Power Supply
(VDD): +2.0V +3.0V +3.6V
Consumption
Transmission: 55mA@25mW 66mA@35mW
Command/Data mode 11mA 13mA
Reception : TBD
Stand-by (32.768 kHz On) :
< 2uA
I/O low level : GND - 0.2x V
DD
I/O high level : 0.8x V
DD
- V
DD

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
Reserved. Page 16 of 38
3.5. LE51-868 S Functional Characteristics
Measured on DIP interface with T = 25°C, Vdd = 3V, 50Ωimpedance and default power
register setting if nothing else noted.
Frequency Band 868.178 MHz – 868.222 MHz
RF Data Rate 100 bps
Number of channels 1
Total slot number 480
Slot Width 100 Hz
Blacklisted slots 0 to 19; 221 to 259; 460 to 480
Center Frequency 868.2 MHz
Total Bandwidth 48 kHz
Transmission
Modulation Format (D)BPSK
Technology Sigfox Protocol
RF Output Power
Up to 30mW @3.0 Volts

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
Reserved. Page 17 of 38
Limits allowed by ETSI Standard are reported in the table below:

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
Reserved. Page 18 of 38
3.6. Digital Characteristic
Function Characteristics
µC •128 kB + 8 kB in system programmable flash •8 kB RAM
•2 kB E
2
PROM
Serial link
•RS232 TTL Full Duplex
•1200 to 115200 bps
•7 or 8 bits
•Parity management
•Flow control
oHardware (RTS/CTS)
Embedded software
functionality
•Flexibility:
oPre flashed
oCustomization capability
oDownload over the air
3.7. Absolute Maximum Ratings
Voltage applied to Vcc, V
DD
: -0.3V to +3.6V
Voltage applied to “TTL” Input : -0.3V to V
DD
+0.3V

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
Reserved. Page 19 of 38
3.8. Ordering Information
The following equipments can be ordered:
•The SMD version (LE51-868 S)
•The DIP interface version (LE51-868 S)
•The Demo Case (LE51-868 S) composed by n.1 evaluation boards, n.1 DIP interface
boards, RF antennas, serial cable, battery.
The versions below are considered standard and should be readily available. For other
versions, please contact Telit. Please make sure to give the complete part number when
ordering.

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
Reserved. Page 20 of 38
Equipment
SMD Version
LE51-868 S/SMD
DIP Version
B
LE51
-
868
S
Demo Case
D LE51-868 S