Telit Wireless Solutions SL871 Series Product User Manual
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Telit Wireless Solutions SL871 Series Product User Manual

Telit Wireless Solutions SL871 Series Product User Manual

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SL871 Family
Product User Guide
1VV0301170
Rev. 9 – 2021-07-15
Telit Technical Documentation

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Summary of Contents for Telit Wireless Solutions SL871 Series

  • Page 1 SL871 Family Product User Guide 1VV0301170 Rev. 9 – 2021-07-15 Telit Technical Documentation...

  • Page 2: Applicability Table

    SL871 Family Product User Guide APPLICABILITY TABLE PRODUCTS SL871 SL871L SL871-S SL871L-S 1VV0301170 Rev. 9 Page 2 of 89 2021-07-15 Not Subject to NDA...

  • Page 3: Table Of Contents

    SL871 Family Product User Guide CONTENTS APPLICABILITY TABLE CONTENTS INTRODUCTION Scope Audience Contact Information, Support Symbol Conventions Related Documents Related Documents Requiring a Non-Disclosure Agreement 9 PRODUCT DESCRIPTION Product Overview Product Naming Product Variants SL871-S and SL871L-S Features 2.3.1.1. ROM versions SL871 Product Features Table Block Diagrams SL871 (Gen 2) Block Diagram...
  • Page 4 SL871 Family Product User Guide Differential GPS (DGPS) (SL871 and SL871L only) Assisted GPS (AGPS) Locally generated AGPS - Embedded Assist System (EASY) 20 Server-generated AGPSS - Extended Prediction Orbit (EPO)20 Host EPO 10 Hz Navigation Elevation Mask Angle Static Navigation Jamming Rejection –...
  • Page 5 SL871 Family Product User Guide NMEA Output Messages Standard Messages Proprietary Output Messages NMEA Input Commands NMEA Commands List FLASH UPGRADABLITY ELECTRICAL INTERFACE Pinout Diagrams and Tables SL871 (Gen 2) and SL871L Pin-out Diagram and Table SL871-S and SL871L-S Pin-out Diagram and Table DC Power Supply VBATT VCC_RF...
  • Page 6 SL871 Family Product User Guide 9.3.4.1. 1PPS Serial I/O Ports Serial Port Usage 9.4.1.1. Primary (Port 0) Usage 9.4.1.2. Secondary Port Usage UART Port Operation I2C Port Operation (SL871 and SL871L only) Antenna RF Interface RF-IN Frequency Plan Burnout Protection Jamming Rejection –...
  • Page 7 SL871 Family Product User Guide Moisture Sensitivity ESD Sensitivity Assembly Considerations Washing Considerations Reflow Disposal Safety ENVIRONMENTAL REQUIREMENTS Operating Environmental Limits Storage Environmental Limits COMPLIANCES EU (RED) Declarations of Conformity EU (RED) Declaration of Conformity – SL871 EU (RED) Declaration of Conformity – SL871L EU (RED) Declaration of Conformity –...

  • Page 8: Introduction

    SL871 Family Product User Guide 1. INTRODUCTION Scope The purpose of this document is to provide information regarding the function, features, and usage of the Telit products listed in Applicability Table. Please refer to chapter 2. Product Description for details of product features and product variants.

  • Page 9: Symbol Conventions

    SL871 Family Product User Guide Symbol Conventions Danger: This information MUST be followed or catastrophic equipment failure or personal injury may occur. Warning: Alerts the user on important steps about the module integration. Note/Tip: Provides advice and suggestions that may be useful when integrating the module.

  • Page 10: Product Description

    SL871 Family Product User Guide 2. PRODUCT DESCRIPTION The SL871 family of GNSS receiver modules provides complete position, velocity, and time (PVT) engines featuring high performance, high sensitivity, and low power consumption. All modules compute a navigation solution using GPS signals. Multi-constellation modules add GLONASS, BeiDou, and Galileo signals to yield better coverage, greater accuracy, and improved availability.

  • Page 11: Product Naming

    SL871 Family Product User Guide o SL871: 8 Megabit built-in flash. o SL871-S: ROM • 76 mW typical power consumption (Full Power, GPS + GLONASS) • Power management modes for extended battery life • Supported by evaluation kits -40°C to +85°C industrial temperature range •...

  • Page 12: Rom Versions

    SL871 Family Product User Guide • The 2nd port is UART only (I2C is not supported) • Locally generated AGPS (EASY - Embedded Assist System) on SL871-S and SL871L-S is supported only on MT3337E ROM (version 2.3) after Oct. 2015. •...

  • Page 13: Block Diagrams

    SL871 Family Product User Guide SL871-S Feature SL871 SL871L SL871-S SL871L-S (Early Production) Force On Software Upgradable Yes (host) Table 2: SL871 Family Product Features SL871-S Feature SL871L-S (Early production) ROM version 3337 3337E (enhanced) EASY SBAS AlwaysLocate LOCUS Table 3: ROM Features (-S modules only) Block Diagrams SL871 (Gen 2) Block Diagram Figure 1: SL871 (Gen 2) Block Diagram...

  • Page 14: Sl871L Block Diagram

    SL871 Family Product User Guide SL871L Block Diagram Figure 2: SL871L Block Diagram SL871-S Block Diagram Figure 3: SL871-S - Block Diagram 1VV0301170 Rev. 9 Page 14 of 89 2021-07-15 Not Subject to NDA...

  • Page 15: Sl871L-S Block Diagram

    SL871 Family Product User Guide SL871L-S Block Diagram Figure 4: SL871L-S - Block Diagram 1VV0301170 Rev. 9 Page 15 of 89 2021-07-15 Not Subject to NDA...

  • Page 16: Module Photo

    SL871 Family Product User Guide Module Photo Figure 5: SL871 Family Module – Photo Note: All variants have similar appearance (except for the product name). 1VV0301170 Rev. 9 Page 16 of 89 2021-07-15 Not Subject to NDA...

  • Page 17: Evaluation Kit

    SL871 Family Product User Guide 3. EVALUATION KIT Please refer to the product Evaluation Kit User Guide for detailed information. Figure 6: Evaluation Kit Contents Note: The SL871 kit includes a GPS / GLONASS / BeiDou antenna. 1VV0301170 Rev. 9 Page 17 of 89 2021-07-15 Not Subject to NDA...

  • Page 18: Evaluation Unit

    SL871 Family Product User Guide Evaluation Unit Figure 7: SL871 Evaluation Unit 1VV0301170 Rev. 9 Page 18 of 89 2021-07-15 Not Subject to NDA...

  • Page 19: Product Features

    SL871 Family Product User Guide 4. PRODUCT FEATURES Multi-Constellation Navigation (SL871 and SL871L only) GPS and GLONASS constellations are enabled by default. If BeiDou is enabled, GLONASS and Galileo are disabled. The user may enable or disable constellations via the $PMTK353 command The SL871-S and SL871L–S support GPS only.

  • Page 20: Differential Gps (Dgps) (Sl871 And Sl871L Only)

    SL871 Family Product User Guide Differential GPS (DGPS) (SL871 and SL871L only) DGPS is a Ground-Based Augmentation System (GBAS) for reducing position errors by applying corrections from a set of accurately-surveyed ground stations located over a wide area. These reference stations measure the range to each satellite and compare it to the known-good range.

  • Page 21: Host Epo

    SL871 Family Product User Guide Server-generated ephemeris predictions are maintained on Telit AGPS servers. The predicted ephemeris file is obtained from the AGPS server and is transmitted to the module over a serial port. These predictions do not require local broadcast ephemeris collection, and are valid for up to 14 days.

  • Page 22: Internal Lna (Sl871L And Sl871L-S Only)

    SL871 Family Product User Guide The navigation solution is unfrozen when the speed increases above a threshold or when the computed position exceeds a set distance (10 m) from the frozen position (indicating that the receiver is again in motion). The speed threshold can be set via the command. Set this threshold to zero to disable static navigation.

  • Page 23: 1Pps

    SL871 Family Product User Guide 1PPS The module provides a 1PPS output signal. See section 9.3.4.1 1PPS for details. Serial I/O Ports Port 0: All modules include a primary UART serial port. Port 1: The secondary port on MT3333-based modules is I2C by default, but can be changed to UART via command.

  • Page 24: Full Power Continuous Mode

    SL871 Family Product User Guide Power Management - Command Summary $PMTK Cmd Type State Full Power To Exit (wake) from a commanded low-power state Full Perpetual Backup To wake:Force_ON Signal (MT3333 only) Backup Standby To wake:Character to Rx Stop Backup Periodic (MT3333 only) Specify Extended Parameters Backup...

  • Page 25: Standby Modes

    SL871 Family Product User Guide To enter the Perpetual Backup mode, use the NMEA command: $PMTK225,4. Warning: Only the SL871 and SL871L have a Force_On pin. This command will be rejected on the other modules (SL871-S and SL871L-S). To exit the Perpetual Backup mode, bring the Force_On signal high, then return to low. See section 9.3.3.2 FORCE-ON for details.

  • Page 26: Periodic Modes (Sl871 And Ls871L Only)

    SL871 Family Product User Guide To enter the GLP mode, send the command: $PMTK262,3 To exit the GLP mode and return to full-power mode, send the command: $PMTK262,0 Periodic Modes (SL871 and LS871L only) These modes allow autonomous power on/off control with reduced fix rate to decrease average power consumption.
  • Page 27 SL871 Family Product User Guide Figure 12: Periodic Mode Example 2 To enter a Periodic mode, send the following NMEA command(s): $PMTK223,<SV>,<SNR>,<Extension threshold>,<Extension gap>*<checksum> (Optional) Where: SV = 1 to 4, default = 1 SNR = 25 to 30, default = 28 Ext.

  • Page 28: Alwayslocate™ Modes

    SL871 Family Product User Guide To exit Periodic Sleep mode, send the NMEA command $PMTK225,0*2B just after the module wakes up from a previous sleep cycle. AlwaysLocate™ Modes (Not available on the SL871L-S and current production SL871-S with enhanced ROM) AlwaysLocate™...

  • Page 29: Data Retention

    SL871 Family Product User Guide 5. DATA RETENTION (SL871 and SL871L modules only) The receiver is capable of retaining data elements under the various initialization types. If Vbatt is maintained, no data will be lost. The following table shows which data elements are saved under each type of initialization if both Vcc and Vbatt are removed.

  • Page 30: Product Performance

    SL871 Family Product User Guide 6. PRODUCT PERFORMANCE Performance - SL871 and SL871L Note: Earlier variants have different performance values. Horizontal Position Accuracy - SL871 and SL871L Horizontal Position Accuracy Constellation(s) CEP (m) Glonass BeiDou 10.2 GPS + Glonass GPS + BeiDou Test Conditions: 24-hr Static, -130 dBm, Full Power mode.

  • Page 31: Sensitivity - Sl871 (Gen 2) And Sl871L

    SL871 Family Product User Guide Constellation(s) Start Type Max TTFF (s) Cold Test Conditions: Static scenario, -130 dBm, Full Power mode Table 7: SL871 and SL871L Time to First Fix Sensitivity - SL871 (Gen 2) and SL871L Constellation(s) State Minimum Signal Level (dBm) SL871 (Gen 2) SL871L Acquisition...

  • Page 32: Time To First Fix - Sl871-S And Sl871L-S

    SL871 Family Product User Guide Time to First Fix - SL871-S and SL871L-S Constellation Start Type Max TTFF (s) Warm Assisted Warm Cold Test Conditions: -130 dBm, Full Power mode, Static scenario Table 10: SL871-S and SL871L-S Time to First Fix Sensitivity - SL871-S and SL871L-S Constellation State...

  • Page 33: Jamming Mitigation Performance Example

    SL871 Family Product User Guide Jamming Mitigation Performance Example Figure 13: Jamming with AIC Disabled Figure 14: Jamming with AIC Enabled 1VV0301170 Rev. 9 Page 33 of 89 2021-07-15 Not Subject to NDA...

  • Page 34: Message Interface

    SL871 Family Product User Guide 7. MESSAGE INTERFACE Serial I/O port 1 (RX and TX pins) supports full duplex communication between the receiver and the user. The default serial configuration is: NMEA, 9600 bps, 8 data bits, no parity, 1 stop bit. More information regarding the software interface can be found in the Telit MT Software User Guide.

  • Page 35: Proprietary Output Messages

    SL871 Family Product User Guide The following messages can be enabled by command: Message ID Description Geographic Position – Latitude & Longitude Course Over Ground & Ground Speed Time & Date Table 13: Available Messages The following table shows the Talker IDs used: Talker ID Constellation BeiDou...

  • Page 36: Nmea Commands List

    SL871 Family Product User Guide NMEA Commands List Note: See Table 4: Power Management - Command Summary for power management commands. Command Description Test. This command will be echoed back to the sender $PMTK000 (for testing the communications link). $PMTK101 Perform a HOT start $PMTK102 Perform a WARM start...

  • Page 37: Flash Upgradablity

    SL871 Family Product User Guide 8. FLASH UPGRADABLITY (SL871 and SL871L only) Note: The SL871-S and SL871L-S have ROM and are not upgradable. Please refer to the product EVK User Guide for more detailed information. The firmware stored in the internal Flash memory of the SL871 may be upgraded via the serial port TX/RX pins.

  • Page 38: Electrical Interface

    SL871 Family Product User Guide 9. ELECTRICAL INTERFACE Pinout Diagrams and Tables SL871 (Gen 2) and SL871L Pin-out Diagram and Table Figure 15: SL871 (Gen 2) and SL871L Pin-out Diagram 1VV0301170 Rev. 9 Page 38 of 89 2021-07-15 Not Subject to NDA...
  • Page 39 SL871 Family Product User Guide Name Type Description Notes Ground See 9.4.2 UART Port Operation. RX0. See 9.4.2 UART Port Operation. 1PPS Time mark Pulse, (1PPS). See 9.3.4.1 1PPS Antenna-Open (high true). See 9.3.2.3 ANT-OC (SL871 and ANT-OC SL871L only) This pin can be re-configured as Data Ready Indicator.

  • Page 40: Sl871-S And Sl871L-S Pin-Out Diagram And Table

    SL871 Family Product User Guide SL871-S and SL871L-S Pin-out Diagram and Table Figure 16: SL871-S and SL871L-S Pin-out Diagram 1VV0301170 Rev. 9 Page 40 of 89 2021-07-15 Not Subject to NDA...
  • Page 41 SL871 Family Product User Guide Name Type Description Notes Ground TX0. See 9.4.2 UART Port Operation RX0. See 9.4.2 UART Port Operation 1PPS Time mark Pulse, (1PPS). See 9.3.4.1 1PPS No Connection VBATT Backup Voltage Supply. See 9.2 DC Power Supply Can be connected to VCC (for compatibility) or left unconnected Supply Voltage.

  • Page 42: Dc Power Supply

    SL871 Family Product User Guide DC Power Supply The modules have two power supply pins Vcc and Vbatt. Warning: Note that I/O voltage ranges are different from supply voltages VCC and VBATT. This is the main power input. The supply voltage must be in the range specified in Table 19: DC Supply Voltage below.

  • Page 43: Vcc_Rf

    SL871 Family Product User Guide This allows the module to retain time and ephemeris information, thus enabling hot and warm starts, which will improve TTFF. VCC_RF VCC_RF is directly connected to VCC internally and may be used to power an external LNA or bias-T.

  • Page 44: Dc Power Consumption - Sl871L

    SL871 Family Product User Guide DC Power Consumption – SL871L State & Constellation Units Acquisition GPS Only GPS + Glonass GPS + BeiDou Navigation/Tracking GPS Only GPS + Glonass GPS + BeiDou Low Power – Periodic (500 ms duty cycle) GPS Only GPS + Glonass GPS + BeiDou...

  • Page 45: Dc Power Consumption - Sl871L-S

    SL871 Family Product User Guide DC Power Consumption - SL871L-S State & Constellation Units Acquisition GPS Only Navigation/Tracking GPS Only Vbatt μW Operating temperature is 25°C. Supply voltages were nominal 3.3 VDC. Table 23: SL871L-S Power Consumption Digital Interface Signals I/O Signal Levels Warning: Note that I/O voltage ranges are different from supply voltages VCC and VBATT.

  • Page 46: Logic Levels - Outputs

    SL871 Family Product User Guide Force-On (SL871 and SL871L only) Input Voltage (H) 0.875 Note: Force-on is only available on the SL871 and SL871L. For typical applications, use a pulldown of 10k Ω. Table 25: Input Logic Levels: Force-On 9.3.1.2. Logic Levels - Outputs TX, TX1, and 1PPS Signal Symbol...

  • Page 47: Ant-On (Output)

    SL871 Family Product User Guide 9.3.2.2. ANT-ON (output) Antenna on (ANT-ON) is an output logic signal to control the power supplied to an external LNA or active antenna (e.g. using an external FET switch connected from VCC- RF to a bias-T). When logic high, the external antenna or LNA should be active; when logic low the external antenna should be powered down.

  • Page 48: Force-On (Sl871 And Sl871L Only)

    SL871 Family Product User Guide 9.3.3.2. FORCE-ON (SL871 and SL871L only). For typical operation, connect this pin through a 10 KΩ resistor to ground to create a pulldown (which will prevent noise from accidentally activating this pin). Upon command, the module will enter the backup (low power) state. To exit this state, drive the Force-on signal high (true) to force the module to return to the full power state.

  • Page 49: Serial I/O Ports

    SL871 Family Product User Guide These configurations will not be preserved across a power cycle or reset. 1PPS is disabled if the fix rate > 1 Hz. Variation is ≈ 30 ns (1 σ). The logic levels are shown in Table 26: Output Logic Levels: TX and 1PPS. Serial I/O Ports All modules include two serial ports.

  • Page 50: Uart Port Operation

    SL871 Family Product User Guide RX1/SCL: This port accepts DGPS input using the RTCM SC-104 protocol or NMEA commands. Warning: The interface is changed via the $PMTK258 command. Note that the module will reset when the interface is changed. UART Port Operation UART ports are full-duplex and support configurable baud rates.
  • Page 51 SL871 Family Product User Guide • Slave mode only (hard-coded address = 0x10) • Fast mode (up to 400 Kbps) • 7-bit address • 255-byte buffer • The module operates in the polled mode (with the host as the master.) Transmit The host must be able to read several packets each report cycle.

  • Page 52: Antenna Rf Interface

    SL871 Family Product User Guide Antenna RF Interface RF-IN The RF input (RF-IN) pin accepts GNSS signals in the range of 1561 MHz to 1606 MHz (1573.42 to 1577.42 MHz for the SL871-S) at a level between -125 dBm and -165 dBm into 50 Ohm impedance.

  • Page 53: Jamming Rejection - Active Interference Cancellation

    SL871 Family Product User Guide Jamming Rejection – Active Interference Cancellation Jamming Rejection can be used for solving narrow band (CW) EMI problems in the customer’s system. It is effective against narrow band clock harmonics. Jamming Rejection is not effective against wide band noise, e.g. from a host CPU memory bus or switching power supply because these sources typically cannot be distinguished from thermal noise.

  • Page 54: Rf Front-End Design

    SL871 Family Product User Guide 10. RF FRONT-END DESIGN The SL871 and SL871-S modules contain a preselect SAW filter in front of the RF input. The SL871L and SL871L-S modules add an LNA in front of the (post-select) SAW filter which allows the modules to work well with passive GNSS antennas.
  • Page 55 SL871 Family Product User Guide Each GNSS satellite presents its own signal to the receiver, and best performance is obtained when the signal levels are between -130 dBm and -125 dBm. These received signal levels are determined by: • Satellite transmit power •...

  • Page 56: Gnss Antenna Polarization

    SL871 Family Product User Guide GNSS Antenna Polarization GNSS satellites all broadcast a signal that is Right Hand Circularly Polarized (RHCP). An RHCP antenna will have 3 dB gain compared to a linearly-polarized antenna (assuming the same antenna gain specified in dBic and dBi respectively). An RHCP antenna is better at rejecting multipath interference than a linearly polarized antenna because the reflected signal changes polarization to LHCP.

  • Page 57: System Noise Floor

    SL871 Family Product User Guide An antenna vendor should specify a nominal antenna gain (usually at zenith (directly overhead) and antenna pattern curves specifying gain as a function of elevation and azimuth. Pay careful attention to requirements to meet the required design, such as ground plane size and any external matching components.

  • Page 58: Rf Trace Losses

    SL871 Family Product User Guide However, if a good quality external LNA is used, the noise figure of that LNA (typically better than 1dB) could reduce the overall system noise figure from 4 dB to approximately 2 dB. RF Trace Losses RF Trace losses on a PCB are difficult to estimate without having appropriate tables or RF simulation software.

  • Page 59: Input To The Pre-Select Saw Filter (Sl8721 Gen 2 And Sl871-S Only)

    SL871 Family Product User Guide Input to the Pre-select SAW Filter (SL8721 Gen 2 and SL871-S only) The SL871 and SL871-S modules include a pre-select SAW filter at the RF input in front of the internal LNA. Thus, the RF input of the module is connected directly to the SAW filter.

  • Page 60: Rf Interference

    SL871 Family Product User Guide Use an inductor to tie directly to the RF trace. This inductor should be at self- • resonant at L1 (1.57542 GHz) and should have good Q for low loss. The higher the inductor Q, the lower the loss will be. The side of the inductor connecting to the antenna supply voltage should be bypassed to ground with a good quality RF capacitor, also with self-resonance at the L1 frequency.

  • Page 61: Shielding

    SL871 Family Product User Guide its passband. Because of the nature of the address and data lines, this would be broadband digital noise at a relatively high level. Such devices are required to adhere to a regulatory standard for emissions such as FCC Part 15 Subpart J Class B or CISPR 22.

  • Page 62: Reference Design

    SL871 Family Product User Guide 11. REFERENCE DESIGN Figure 18: SL871 Family Reference Design Along with power and grounds, the minimum signals required to operate the receiver properly are the RF input signal and two digital signals (TX and RX). The RF input can be connected directly to a passive GNSS antenna.
  • Page 63 SL871 Family Product User Guide Refer to the tables in chapter 9 Electrical Interface for logic levels. Note that some pins are different for the SL871-S. See chapter 9 Electrical Interface. 1VV0301170 Rev. 9 Page 63 of 89 2021-07-15 Not Subject to NDA...

  • Page 64: Mechanical Drawing

    SL871 Family Product User Guide 12. MECHANICAL DRAWING The SL871 modules use advanced miniature packaging with a base metal of copper and an Electroless Nickel Immersion Gold (ENIG) finish. There are 18 interface pads with castellated edge contacts. The shield is tin-plated. Figure 19: SL871 Family Mechanical Drawing 1VV0301170 Rev.

  • Page 65: Pcb Footprint

    SL871 Family Product User Guide 13. PCB FOOTPRINT The PCB footprint on the PC board should match the module pad design shown below. The solder mask opening is generally determined by the component geometry of other parts on the board and can be followed here. Figure 20: SL871 Family PCB Footprint 1VV0301170 Rev.

  • Page 66: Packaging & Handling

    SL871 Family Product User Guide 14. PACKAGING & HANDLING Product Marking and Serialization The SL871 modules have a 2D barcode label identifying the product (SL871, SL871L, SL871-S or SL871L-S) and its serial number. Contact a Telit representative for information on specific module serial numbers. The label format is as follows: Figure 21: Product Label Description...

  • Page 67: Product Packaging

    SL871 Family Product User Guide Product Packaging SL871 modules are shipped in Tape and Reel form on 24 mm reels with 1000 units per reel and mini-reels with 250 units per reel. Each reel is ‘dry’ packaged and vacuum sealed in a Moisture Barrier Bag (MBB) with two silica gel packs and a humidity indicator card which is then placed in a carton.

  • Page 68: Moisture Sensitivity

    SL871 Family Product User Guide Moisture Sensitivity Precautionary measures are required in handling, storing and using these devices to avoid damage from moisture absorption. If localized heating is required to rework or repair the device, precautionary methods are required to avoid exposure to solder reflow temperatures that can result in performance degradation.

  • Page 69: Esd Sensitivity

    SL871 Family Product User Guide Figure 24: Moisture Sensitive Devices Label ESD Sensitivity Note: The modules contain class 1 devices and are Electro-Static Discharge Sensitive (ESDS). Telit recommends two basic techniques for protecting ESD devices from damage: • Handle sensitive components only in an ESD Protected Area (EPA) under protected and controlled conditions.

  • Page 70: Assembly Considerations

    SL871 Family Product User Guide All personnel handling ESDS devices have the responsibility to be aware of the ESD threat to the reliability of electronic products. Further information can be obtained from the JEDEC standard JESD625-A “Requirements for Handling Electrostatic Discharge Sensitive (ESDS) Devices”, which www.jedec.org can be downloaded free of charge from:...
  • Page 71 SL871 Family Product User Guide When re-flowing a dual-sided SMT board, it is important to reflow the side containing the module last. This prevents heavier components within the module from becoming dislodged if the solder reaches liquidus temperature while the module is inverted. Note: JEDEC standards are available free from the JEDEC website https://www.jedec.org The recommended reflow profile is shown in the following figure:...

  • Page 72: Disposal

    SL871 Family Product User Guide Disposal We recommend that this product should not be treated as household waste. For more detailed information about recycling this product, please contact your local waste management authority or the reseller from whom you purchased the product. Safety Danger: Improper handling and use of this module can cause permanent damage.

  • Page 73: Environmental Requirements

    SL871 Family Product User Guide 15. ENVIRONMENTAL REQUIREMENTS Operating Environmental Limits Operating Environmental Limits Temperature -40°C to +85°C Temperature Rate of Change ±1°C / minute maximum Up to 95% non-condensing or a wet bulb temperature of +35°C, Humidity whichever is less Maximum Vehicle Dynamics 2G acceleration Table 31: Operating Environmental Limits...

  • Page 74: Compliances

    SL871 Family Product User Guide 16. COMPLIANCES The modules comply with the following: • Directive 2011/65/EU art. 16 on the restriction of the use of certain hazardous substances in electrical and electronic equipment (RoHS) • Manufactured in an ISO 9001: 2008 accredited facility •...

  • Page 75: Eu (Red) Declarations Of Conformity

    SL871 Family Product User Guide EU (RED) Declarations of Conformity EU (RED) Declaration of Conformity – SL871 Figure 26: EU RED Declaration of Conformity - SL871 1VV0301170 Rev. 9 Page 75 of 89 2021-07-15 Not Subject to NDA...

  • Page 76: Eu (Red) Declaration Of Conformity - Sl871L

    SL871 Family Product User Guide EU (RED) Declaration of Conformity – SL871L Figure 27: EU RED Declaration of Conformity - SL871L 1VV0301170 Rev. 9 Page 76 of 89 2021-07-15 Not Subject to NDA...

  • Page 77: Eu (Red) Declaration Of Conformity - Sl871-S

    SL871 Family Product User Guide EU (RED) Declaration of Conformity – SL871-S Figure 28: EU RED Declaration of Conformity - SL871-S 1VV0301170 Rev. 9 Page 77 of 89 2021-07-15 Not Subject to NDA...

  • Page 78: Eu (Red) Declaration Of Conformity - Sl871L-S

    SL871 Family Product User Guide EU (RED) Declaration of Conformity – SL871L-S Figure 29: EU RED Declaration of Conformity - SL871L-S 1VV0301170 Rev. 9 Page 78 of 89 2021-07-15 Not Subject to NDA...

  • Page 79: Product And Safety Information

    SL871 Family Product User Guide 17. PRODUCT AND SAFETY INFORMATION Copyrights and Other Notices SPECIFICATIONS ARE SUBJECT TO CHANGE WITHOUT NOTICE Although reasonable efforts have been made to ensure the accuracy of this document, Telit assumes no liability resulting from any inaccuracies or omissions in this document, or from the use of the information contained herein.

  • Page 80: Usage And Disclosure Restrictions

    SL871 Family Product User Guide computer programs, including – but not limited to - the exclusive right to copy or reproduce in any form the copyrighted products. Accordingly, any copyrighted computer programs contained in Telit’s products described in this instruction manual shall not be copied (reverse engineered) or reproduced in any manner without the express written permission of the copyright owner, being Telit or the Third Party software supplier.

  • Page 81: Trademarks

    SL871 Family Product User Guide Trademarks TELIT and the Stylized T-Logo are registered in the Trademark Office. All other product or service names are property of their respective owners. Third Party Rights The software may include Third Party’s software Rights. In this case the user agrees to comply with all terms and conditions imposed in respect of such separate software rights.

  • Page 82: Safety Recommendations

    SL871 Family Product User Guide Safety Recommendations Make sure the use of this product is allowed in your country and in the environment required. The use of this product may be dangerous and has to be avoided in areas where: •...

  • Page 83: Glossary

    SL871 Family Product User Guide 18. GLOSSARY Assisted (or Aided) GPS AGPS provides ephemeris data to the receiver to allow faster cold start times than would be possible using only broadcast data. AGPS This extended ephemeris data could be either server-generated or locally generated.
  • Page 84 SL871 Family Product User Guide A factor used to describe the effect of satellite geometry on the accuracy of the time and position solution of a GNSS receiver. A lower value of GDOP indicates a smaller error in the solution. Related factors include PDOP (position), HDOP (horizontal), VDOP (vertical) and TDOP (time).
  • Page 85 SL871 Family Product User Guide a tunnel), and re-establishes a valid fix after the signal is restored. Contrast with Reset and Restart. A receiver beginning operation after receiving a restart command, generally used for testing rather than normal operation. A restart Restart can also result from a power-up.
  • Page 86 SL871 Family Product User Guide The North American SBAS system developed by the US FAA (Federal Aviation Administration). A warm start occurs when a receiver begins operation with known (at least approximately) time and position, but unknown ephemeris Warm Start data, typically after being sent a restart command.

  • Page 87: Document History

    SL871 Family Product User Guide 19. DOCUMENT HISTORY Revision Date Changes 2021-07-15 Modified section 9.4.3 to document features supported via I2C port. Updated document to new Telit standard template. 2018-08-22 Added note that Ant_OC (pin 5) can be re-configured to DRI. Added: “Always Locate”...
  • Page 88 SL871 Family Product User Guide Add CE certificates Minor text changes Change product name suffix form “Gen 3” to “L” 2016-03-25 Minor text changes Gen 2: SMPS, Ant-On, Ant Sense, Force-On Gen 3: LNA, DC block, 2nd Port -S Gen 3: LNA, DC block, 2nd port (UART only) Figure 3.1: Updated antenna description 4.2: Clarify Static Nav description 4.3.1.1: Correct EASY to off by default...

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