T19Plus US User Manual
(STRLNK2P) Table of Contents 1 Introduction .......................................................................................................................................... 3 1.1 Purpose and Scope .............................................................................................................................. 3 1.2 Product Description ............................................................................................................................ 3 1.3 Power and Grounding ......................................................................................................................... 4 1.3.1 Power and Grounding .................................................................................................................. 4 1.3.2 Backup Battery (BUB) ................................................................................................................... 5 1.3.3 TCU Interface to External LTE/GSM Antennas ............................................................................. 5 1.3.4 TCU Interface External Fault Detection ....................................................................................... 5 1.4 WiFi ..................................................................................................................................................... 6 1.4.1 WiFi internal Antenna .................................................................................................................. 6 1.5 Connectors .......................................................................................................................................... 6 1.5.1 USB Connector ............................................................................................................................. 6 1.5.2 RF Connector ................................................................................................................................ 7 1.5.3 BUB Connector ............................................................................................................................. 7 1.6 TCU Module Label ............................................................................................................................... 8 1.7 TCU Antenna Transmit Area ............................................................................................................... 8 Vehicle Installation Guidelines .............................................................................................................. 9 Regulatory Compliance Notes ............................................................................................................. 10 External Antenna Requirements for use with T19Plus US Device ...................................................... 11 Instructions to OEMS .......................................................................................................................... 11 2 3 4 5 1 Introduction The Telematics Control Unit (TCU) integrates an on-board cellular communication module with a WiFi hotspot functionality and interacts with remote call/data centers to provide valuable services to the vehicle customer. 1.1 Purpose and Scope This document aims to describe the device operating principles and provide installation instruction to OEM to insure safe use of the device. 1.2 Product Description Subaru T19Plus US TCU is a proprietary Telecommunication Unit (TCU) designed and manufactured by Continental Automotive. The TCU includes an integrated Network Access Device (NAD) that is also designed and produced by Continental. The TCU will be installed as a vehicle mounted wireless devices into Subaru vehicles during the OEMs factory assembly process and will not be accessible without use of special tools. The TCU functionalities are accomplished by 2G/3G/4G technologies (Voice & Data) and defined service feature. The TCU comprises of the following subsystem components:
Power supply Vehicle micro-controller (VuC) Network Access Device (NAD) Vehicle interface / communications Battery 1.3 Power and Grounding The TCU is designed to operate via an unfiltered 5 A fused input from the vehicle battery: Vbatt Ground return is through a single ground pin: GND 1.3.1 Power and Grounding Operating voltage range is provided in the following table. Table 3.1.1 TCU Operating Voltage Conditions Voltage Range (Vdc) 9.0 < VBATT < 16.0 Subsystem Operating Conditions Normal operation. TCU is fully functional The VBATT connection (pin 17) shall support up to 2.5A current draw with 4.5A peaks. Vehicle wire gauge must be chosen to support this current load with less than 0.5V drop between battery terminal and this pin. 1.3.1.1 VBatt values out of normal range The threshold voltage transition from Vehicle Battery to Backup Battery:
If the VBATT voltage transitions downward from >8.6V to <7.3V and BUB voltage is >2.0V, the DCM shall begin using the BUB as a power source (i.e. switch to BUB), or, if no BUB is present, become UNPOWERED. The threshold voltage transition from Backup Battery to Vehicle Battery:
If the VBATT voltage transitions upward from <7.7V to >9.0V AND BUB voltage > 2.0V, the DCM shall begin using the VBATT as a power source (i.e. switch to +B). The DCM shall continue to be OPERATING ON VBATT until the conditions of DCM_02552 or DCM_00031 are met. 1.3.2 Backup Battery (BUB) BUB refers to the Back-up Battery installed in the DCM; the DCM is shipped to Subaru with a BUB installed. This battery can be used to power the DCM if the main vehicle battery is lost. The BUB has no effect on DCM feature operation when DCM is running on MAIN BATTERY, i.e. when MAIN BATTERY is at least 7V. The BUB used on the DCM has the following characteristics Technology: LiFePO4 (Lithium-Iron) Rated Capacity: 1100mAh Nominal Voltage: 3.2V Temperature: Charge 0 to 45C, Discharge -30 to 60C. Charging Voltage (Max): 3.81V Minimum End of Discharge Voltage: 2.0V Protection Circuit Required : No 1.3.3 TCU Interface to External LTE/GSM Antennas The TCU has FAKRA connectors to which external LTE/GSM antennas may be connected. 1.3.4 TCU Interface External Fault Detection For vehicles that are configured to use External LTE/GSM Antennas, the TCU has the capability to determine if the External Antenna is connected and to log a fault if it determines that the External Antenna is not connected (circuit open fault). It is also preferred that the TCU detect and log if the External Antenna is shorted to ground. 1.4 WiFi The TCU supports IEEE 802.11a/b/g/n/ac 2.4/5GHz WiFi. 1.4.1 WiFi internal Antenna The TCU contains integrated pcb type F dual band antenna with the following maximum gain 1.5 Connectors 1.5.1 USB Connector Frequency MAX Gain 2442 MHz 3.14 dBi 5220 MHz 0.68 dBi 5785 MHz 1.94 dBi 2 4 1 3 Shield USB Connector pin details
(View from mating side) Pin No. Terminal Name Terminal Description Input(I) / Output(O) USB pin 1 USB pin 2 USB pin 3 USB pin 4 USB+
USBS USBVCC USB-
USB D+
USB Shield GND USB +5V Supply USB D-
I/O GND PS I/O 1.5.2 RF Connector RF Connector pin details
(View from mating side) Terminal Name Terminal Description Input(I) / Output(O) Primary Secondary GPS TEL MAIN antenna signal TEL MAIN antenna GND TEL SUB antenna signal TEL SUB antenna GND GNSS antenna signal GNSS antenna GND I I I GND GND GND 1.5.3 BUB Connector CONNECTOR
(New N proposal) Signal Name VBUB BUB NTC GND NC NC PIN N 1 2 3 M1 M2 BUB connector Molex 43650-0323 1.6 TCU Module Label The TCU labeling shall comply with the regulatory homologation compliance mark(s) that are required by law in those countries. Art work for Subaru T19Plus US is shown below:
The module is marked with the Automotive OEM company trademark, engineering part number, and supplier code. 1.7 TCU Antenna Transmit Area For TCU variants that utilize an internal antenna, the module housing shall not be made of a metal, nor contain a metal coating, that inhibits the transmission, or reception, of cellular signals in the areas specified in the diagrams below. Wi-Fi Antenna The TCU is designed to allow the Wi-Fi antenna signal to propagate out of the top, bottom, and sides of the module. 2 Vehicle Installation Guidelines Normal operating conditions are between -30C to +85C. The sheet metal cover is designed to be a heat sink. A gap between the heat sink and the mounting surface is recommended to facilitate heat transfer out of the module. Exceptions can be made if the module is mounted to a surface that can help facilitate heat transfer such as a large aluminum body panel. The device does not have sealed connectors. It is designed to meet Class I water intrusion conditions (no drip test required), so it should not be placed in area that can get wet. Continental recommends that the automotive OEM uses the mating harness suppliers recommendations for the keep out zone around the connectors to ensure proper mating of each connector. Changes or modifications to this system by other than a facility authorized by Continental could void authorization to use this equipment. The device and its antennas must be installed to provide a separation distance of at least 25 cm from all persons and must not be co-located or operate in conjunction with any other antenna or transmitter. 3 Regulatory Compliance Notes FCC: This device complies with Part 15, Part 22(H), Part 24(E) and Part 27 of the FCC Rules. The FCC ID for this device is LHJ-STRLNK2P. It also contains a certified module with FCC ID: LHJ-BL28NA003. Part 15
(WiFi) operation is subject to the following two conditions:
1. This device may not cause harmful interference. 2. This device must accept any interference received, including interference that may cause undesired operation. Industry of Canada:
This device complies with Industry Canadas license-exempt RSSs. Operation is subject to the following two conditions:
(1) This device may not cause interference; and
(2) This device must accept any interference, including interference that may cause undesired operation of the device. Le prsent appareil est conforme aux CNR d'Industrie Canada applicables aux appareils radio exempts de licence. L'exploitation est autorise aux deux conditions suivantes :
(1) l'appareil ne doit pas produire de brouillage, et
(2) l'utilisateur de l'appareil doit accepter tout brouillage radiolectrique subi, mme si le brouillage est susceptible d'en compromettre le fonctionnement. 4 External Antenna Requirements for use with T19Plus US Device The T19Plus US device is for use with external antennas ONLY, except for Wi-Fi which uses an internal antenna. For all LTE/WCDMA/GSM operating bands the maximum antenna gain including cable loss shall not exceed the following values:
GSM 850: 1 dBi GSM 1900: 2 dBi WCDMA Band 2: 2 dBi WCDMA Band 4: 2 dBi WCDMA Band 5: 1 dBi LTE Band 2: 2 dBi LTE Band 4: 2 dBi LTE Band 5: 1 dBi LTE Band 7: 2 dBi LTE Band 12: 2 dBi 5 Instructions to OEMS Continental must instruct the automotive OEM and provide them to include the following information into the car users manual (i.e. for the TCU):
1. End-users must be provided with transmitter/antenna installation requirements and operating conditions for satisfying RF exposure compliance:
2. A separate section should clearly state FCC RF Exposure requirements:
3. Required operating conditions for end users. 4. The antenna used with this device must be installed to provide a separation distance of at least 25cm from all persons, and must not transmit simultaneously with any other transmitter, except in accordance with FCC multi-transmitter product procedures. 5. The Maximum ERP/EIRP and maximum antenna gain required for compliance with Parts 15, 22H, 24E, and 27. 6. Clear instructions describing the other partys responsibility to obtain station licensing.