GT864-QUAD / PY Hardware User Guide 1vv0300756 Rev.
GT864-QUAD/PY Hardware User Guide 1vv0300756 Rev.0 08/ 05/07 This document is relating to the following products: Model GT864-QUAD GT864-PY P/N 4990150069 4990150070 Reproduction forbidden without Telit Communications S.p.A.
GT864-QUAD/PY Hardware User Guide 1vv0300756 Rev.0 08/ 05/07 Contents 1 Overview.............................................................................................................................................5 2 GT864 Terminal Interfaces ...............................................................................................................6 3 Power Supply................................................................................................................................
GT864-QUAD/PY Hardware User Guide 1vv0300756 Rev.0 08/ 05/07 DISCLAIMER The information contained in this document is the proprietary information of Telit Communications S.p.A. and its affiliates (“TELIT”). The contents are confidential and any disclosure to persons other than the officers, employees, agents or subcontractors of the owner or licensee of this document, without the prior written consent of Telit, is strictly prohibited.
GT864-QUAD/PY Hardware User Guide 1vv0300756 Rev.0 08/ 05/07 1 Overview The aim of this document is the description of some hardware solutions useful for developing a product with the Telit GT864-QUAD/PY Terminal. In this document all the basic functions of a mobile phone will be taken into account; for each one of them a proper hardware solution will be suggested and eventually the wrong solutions and common errors to be avoided will be evidenced.
GT864-QUAD/PY Hardware User Guide 1vv0300756 Rev.0 08/ 05/07 2 GT864 Terminal Interfaces The interfaces of the GT864 Terminal are the following industry standard connectors distributed on the front and rear panels, see figures below. • • • • • • RJ11 6-way (power connector) Analog audio (GT864-QUAD only) 4 Input (GT864-PY only) SIM card reader FME male coaxial jack (antenna connector) Sub-D socket, 9 pin (RS232 serial port) Reproduction forbidden without Telit Communications S.p.A.
GT864-QUAD/PY Hardware User Guide 1vv0300756 Rev.0 08/ 05/07 3 Power Supply 3.1 Supply voltage requirements The DC power supply must be connected to the POWER input: • Input voltage range • Nominal Voltage 5 - 36V DC 12V DC Application of the supply voltage does not switch the modem on. To do so an additional active-high control signal, TO_IN, must be applied for > 0.2s. Please see chapter 3.
GT864-QUAD/PY Hardware User Guide 1vv0300756 Rev.
GT864-QUAD/PY Hardware User Guide 1vv0300756 Rev.0 08/ 05/07 Examples: ADC_IN [V] digital value 5V 192 12V 461 24V 923 32V 1230 3.1.3 Digital Output • • • • • switch voltage is VIN; high side switch max. Output 400mA short circuit protected ESC protected under full control of embedded application The following command has to be used to initialise and to set the digital output: AT#GPIO=3,1,1 switch output on AT#GPIO=3,0,1 switch output off 3.
GT864-QUAD/PY Hardware User Guide 1vv0300756 Rev.0 08/ 05/07 3.3 Switching the GT864 Terminal ON and OFF In this paragraph will be explained the way to switch the GT864 Terminals ON or OFF. There are two ways to switch on the modem, once power is applied. • either assert TO_IN high for > 0.2s; • or activate the RS232 control line DTR, high for > 0.2s. The modem is fully operational after 4 seconds. Logging onto a network may take longer than this and is outside the control of the modem.
GT864-QUAD/PY Hardware User Guide 1vv0300756 Rev.
GT864-QUAD/PY Hardware User Guide 1vv0300756 Rev.0 08/ 05/07 At the mini USB connector are 4 inputs, with the following technical description: • max. voltage VIN is 30V • low level: 0...1V • high level: 4...30V • ESD protected • under full control of embedded application Pinning of the USB connector for the GT864-PY: GT864-PY GPIO GT864-PY PIN GPIO 11 GPIO 12 GPIO 13 GPIO 14 - D1 G4 K10 B4 - Mini USB IN1 IN2 IN3 IN4 Mini USB PIN GND Reproduction forbidden without Telit Communications S.p.A.
GT864-QUAD/PY Hardware User Guide 1vv0300756 Rev.0 08/ 05/07 All inputs are under control of an embedded application script or AT commands. The following AT commands have to be used to initialise and to read the status of the GPIOs: AT#GPIO=11,2,0 (read AT#GPIO=12,2,0 (read AT#GPIO=13,2,0 (read AT#GPIO=14,2,0 (read GPIO11, PIN1 GPIO12, PIN2 GPIO13, PIN3 GPIO14, PIN4 Mini Mini Mini Mini USB) USB) USB) USB) Reproduction forbidden without Telit Communications S.p.A.
GT864-QUAD/PY Hardware User Guide 1vv0300756 Rev.0 08/ 05/07 5 Antenna 5.1 General The antenna is the component in your system that maintains the radio link between the network and the modem. Since the antenna transmits and receives electromagnetic energy, its efficient function will depend on: • the type of antenna (for example, circular or directional); • the placement of the antenna; • communication disturbances in the vicinity in which the antenna operates.
GT864-QUAD/PY Hardware User Guide 1vv0300756 Rev.0 08/ 05/07 5.1.2.1 The antenna cable Use 50Ω impedance low-loss cable and high-quality 50Ω impedance connectors (frequency range up to 2GHz) to avoid RF losses. Ensure that the antenna cable is as short as possible. The Voltage Standing-Wave Ratio (VSWR) may depend on the effectiveness of the antenna, cable and connectors.
GT864-QUAD/PY Hardware User Guide 1vv0300756 Rev.0 08/ 05/07 6 Serial Ports The RS232 standard interface serves to connect a PC, Data Terminal Equipment (DTE) or an application, which acts as host controller of the GT864 Terminal with all its functions. Through the RS232 interface it can be used as GSM/GPRS modem for sending and receiving of SMS, Data and Fax calls.
GT864-QUAD/PY Hardware User Guide 1vv0300756 Rev.0 08/ 05/07 7 Safety and Product Care Please read the information in this section and the information in “Installation of the Modem”, before starting your integration work! 7.1 General precautions The GT864-QUAD/PY Terminal as a stand alone item is designed for indoor use only. To use outside it must be integrated into a weatherproof enclosure. Do not exceed the environmental and electrical limits as specified in “Technical Data”.
GT864-QUAD/PY Hardware User Guide 1vv0300756 Rev.0 08/ 05/07 • When designing your application, the SIM card’s accessibility should be taken into account. We always recommend that you have the SIM card protected by a PIN code. This will ensure that the SIM card cannot be used by an unauthorized person. 7.3 Antenna precautions If the antenna is to be mounted outside, consider the risk of lightning. Follow the instructions provided by the antenna manufacturer.
GT864-QUAD/PY Hardware User Guide 1vv0300756 Rev.0 08/ 05/07 8 Installation of the modem This chapter gives you advice and helpful hints on how to integrate the GT864-QUAD/PY Terminal into your application from a hardware perspective. Please read the information given in “Safety and Product Care”, chapter 7 and then read the information in this section before starting your integration work. 8.
GT864-QUAD/PY Hardware User Guide 1vv0300756 Rev.0 08/ 05/07 8.2 How to install the modem 8.2.1 Power supply • Use a high-quality power supply cable with low resistance. This ensures that the voltages at the connector pins are within the allowed range, even during the maximum peak current. • When the unit is powered from a battery or a high current supply, connect a fast 1.25A fuse in line with the positive supply. This protects the power cabling and modem. 8.2.
GT864-QUAD/PY Hardware User Guide 1vv0300756 Rev.0 08/ 05/07 9 SAFETY RECOMMANDATIONS READ CAREFULLY Be sure the use of this product is allowed in the country and in the environment required.
GT864-QUAD/PY Hardware User Guide 1vv0300756 Rev.0 08/ 05/07 10 Conformity Assessment Issues The GT864-QUAD/PY Terminal is assessed to be conform to the R&TTE Directive as stand-alone products, so If the module is installed in conformance with Dai Telecom installation instructions require no further evaluation under Article 3.2 of the R&TTE Directive and do not require further involvement of a R&TTE Directive Notified Body for the final product.
GT864-QUAD/PY Hardware User Guide 1vv0300756 Rev.0 08/ 05/07 11 Document Change Log Revision Date ISSUE #0 08/05/07 Changes Initial release Reproduction forbidden without Telit Communications S.p.A.
