Sequoia SQ864 Quick user guide

SQ864
GPRS Terminal
Hardware reference manual
Rev 2.1.4
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GPRS Terminal
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CONTENTS
Contents
1. Disclaimer
2. Introducon
3. Denions
4. Device States
5. Interfaces
5.1 Power Supply Requirements
5.1.1 Power Connector
5.2 I/O Interface
5.3 Digital Output
5.4 Digital Input
5.5 RS232
5.6 SIM Socket
5.7 Antenna
5.7.1 Antenna Placement
5.7.1 Antenna Connecon Cable
6. Power Consumpon
7. Switching the SQ864-GPRS Terminal ON and OFF
8. Dimensions
8.1 Top View
8.2 Serial Connector View
8.3 Antenna and Power View
8.4 Sim and GPIO Indicator View
9. Terminal Installaon Consideraons
10. How to Install the Terminal
10.1 Power Supply
10.2 Securing the Modem
11. Safety and Product Care
11.1 General Precauons
11.2 Simm Card Precauons
11.3 Antenna Precauons
12. Safet Recommendaons
13. Conformity Assessment
14. Revision History

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3. Denions
Term Denion
USB Universal Serial Bus
VSWR Voltage Standing Wave Rao
SMA Sub Miniature version A
LED Light Eming Diode
ESD Electro-Stac Discharge

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4. Device States
The current state of the device is indicated by the status LEDs as shown in Table 1 below.
Table 1 Device status LEDs
The current state of the device is indicated by the status LEDs as shown in Table 1 below.
Table 1 Device status LEDs
LED colour State
Red (STAT_LED)
Flash rate once per second: Net search / not registered / turning o
Slow rate once every 3 s: Registered full service
Constant ON: Ringing OR call in progress
OFF: Module power down
Green (TGPIO_01) Reserved / test only
Blue (TGPIO_02) Reserved / test only
Current Device State Input Next state Indicaon of new state
Power O Connect power Run Mode Red LED will ash once per
second
Run Mode Insert a valid SIM card On Network Red LED will ash once every 3
seconds
On Network Apply pulse to pin 3 of power
connector Power o No acvity on any LED
Run Mode Apply pulse to pin 3 of power
connector Power o No Acvity on any LED

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5. Interfaces
• RJ12 6-way (power connector)
• 4 Input GPIO
• SIM card reader
• SMA male coaxial jack (antenna connector)
• Sub-D socket, 9 pin (RS232 serial port)
5.1 Power supply requirements
The DC power supply must be connected to the power input. The characteriscs of the power input are as follows :
• Input voltage 5 to 16V DC
• Nominal input voltage 12V DC
• Supply current
• Peak 2A
• Average standby 25mA
• Call in progress 250mA
• Ringing 250mA
The module is supplied with a 12V mains adaptor. It can also be powered from an alternave power source with a voltage range 5 to 16V,
2A peak current.
Input protecon :
• On board reverse polarity protecon
• Overvoltage spike protecon to 30V for 1mS.
• ESD protecon to +/-4KV contact discharge and +/-8KV air discharge.
5.1.1 Power Connector
Figure 1 SQ864 Power Connector
The pin out and pin funcon of the power connector is shown in table 3.
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Table 3 Power connector pin funcon
Table 4 Modem Power on state
Each pin of type Input is acvated when the voltage on the pin is in the range +2.1V to +16V DC. Pins of type I/O are acvated when the
voltage on the pin is in the range +2.1V to +12V DC. The minimum output drive voltage on pins type I/O is 2.2V
5.2 I/O Interface
A mini USB type B connector is provided for general purpose IO. ESD protecon to +/-4KV contact discharge and +/-8KV air discharge is
provided. Pins on this connector are available for control from the embedded applicaon as shown in table 5.
PIN number Part number Funcon
10V Common 0V connecon
2 RESET_IN External reset input. 0V to 0.5V, or open circuit inacve (Reset OFF), 2 to
16V acve (Reset ON), must be acve for at least 200ms then released.
3 POWER_OFF_IN External power O input, 0V to 0.5V, or open circuit inacve, 2 to 16V pulse
acve (no minimum duraon) (POWER OFF).
4 POWER_ON_IN
External power ON input, 0V to 0.5V, or open circuit inacve, 2 to 16V pulse
(no minimum duraon) acve (POWER ON). Not required for inial power
up, only if unit turned o with POWER_OFF_IN.
5 IGNITION_IN Oponal: Detecon of ignion on.
6POWER +VE 12V nominal, 5-16V DC, 2A peak, reverse polarity protected
Modem State Pin-4 (ON) Pin-3 (OFF) Modem ON/OFF
OFF ACTIVE ACTIVE OFF
ON ACTIVE ACTIVE ON
ON NOT-ACTIVE ACTIVE Switches OFF
OFF NOT-ACTIVE ACTIVE OFF
OFF ACTIVE NOT-ACTIVE Switches ON
ON ACTIVE NOT-ACTIVE ON
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Table 5 Mini USB Connecons
The maximum/minimum input/output voltage allowed on the I/O pins is given in table 6
Table 6 GPIO minimum/maximum voltage
5.3 Digital Output
• Switch voltage is VIN high side switch
• Max output 400mA
• Short circuit protected
• ESD protected
• Under full control of embedded applicaon
The following command has to be used to inialise and to set the digital output:
AT#GPIO=5,1,1 switch output on
AT#GPIO=5,0,1 switch output o
Mini USB Pin Signal on Telit GC864-PY Module Voltage level Funcon
1 GPIO5 CMOS 2.6V GPIO
2 GPIO7 CMOS 2.6V GPIO
3 GPIO8 CMOS 2.6V GPIO
4GPIO11 CMOS 2.6V GPIO
5 GPIO12 CMOS 2.6V GPIO
CASE GND 0v GND
Signal Name Parameter Minimum Maximum
GPIO_05 Input high level 2.1V 5.5V
GPIO_07 to GPIO_12 Input high level 2.1V 3.3V
GPIO_05 to GPIO_12 Input low level 0V 0.5V
GPIO_05 to GPIO_12 Output high level 2.2V 3.0V
GPIO_05 to GPIO_12 Output low level 0V 0.5V

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5.4 Digital Input
• Max voltage dened in Table 6
• Short circuit protected
• ESD protected
• Under full control of embedded applicaon
The following AT commands can be used to inialise and to read the status of the GPIO:
AT#GPIO=5,2,0 (read GPIO_5, PIN1 Mini USB)
AT#GPIO=7,2,0 (read GPIO_7, PIN2 Mini USB)
AT#GPIO=8,2,0 (read GPIO_8, PIN3 Mini USB)
AT#GPIO=11,2,0 (read GPIO_11, PIN4 Mini USB)
AT#GPIO=12,2,0 (read GPIO_12, PIN5 Mini USB)
5.5 Digital Input
A standard RS232 interface is provided through a 9 way D-type socket.
All RS232 pins provide the following ESD protecon:
• +/-15kV – Human Body Model
• +/- 8kV – IEC61000-4-2, Contact Discharge
• +/-15kV- IEC61000-4-2, Air Gap Discharge
As a minimum, TXD, RXD and 0V are required to set up serial communicaons with the module.
Pin Number Signal Direcon Descripon Voltage Level
1DCD Output Data Carrier Detect +/- 5.4V
2RXD Output Received data +/- 5.4V
3TXD Input Transmit data +/- 25V
4DTR Input Data terminal ready +/- 25V
50V GND Ground 0V
6 DSR Output Data set ready +/- 5.4V
7RTS Input Request to send +/- 25V
8CTS Output Clear to send +/- 5.4V
9RI Output Ring Indicator +/- 5.4V

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5.6 SIM Socket
A standard SIM socket is provided which accept 1.8V/3V SIM card for carrier subscripon.
5.6 SIM Socket
A SMA connector is provides to allow connecon of a passive or acve antenna. For opmum performance the antenna assembly
connected to this device is required to have the following characteriscs:
• Specied designed operaon in the following bands :
• GSM 850/900 MHz
• GSM 1800./1900 MHz
• The characterisc impedance on any antenna or cable assembly aached to this device should be 50R
• The antenna must be capable of handling a minimum of 2W output power
• The VSWR should be less than 3:1 to avoid damage to the device.
5.7.1 Antenna placement
When in service the antenna should be placed away from electronic devices or other antennas. The recommended minimum distance
between adjacent antennas, operang on a similar radio band, is at least 50cm.
5.7.2 Antenna connecon cable
If a cable is used to connect the device to the antenna this cable must be a high quality low loss cable. The cable and any connectors used
should have 50R impedance.
Pin No. Name Usage Descripon Voltage Level
1SIM_VCC Power supply for the SIM Data Carrier Detect +/- 5.4V
2 SIM_RESET Output – Resets the SIM Received data +/- 5.4V
3SIM_CLOCK Output – Clock signal for clocking data I/O
from the SIM Transmit data +/- 25V
5,10 SIM_GND 0V Data terminal ready +/- 25V
7 SIM_IO Data I/O signal for the SIM Request to send +/- 25V
9SIM_IN Input – Detects the presence of SIM card in
the connector Clear to send +/- 5.4V

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6. Power Consumpon
The measurement was taken with 2 Voltages (5 V, 12V).
The terminal was connected via RS232 to a PC in order to send/
receive AT commands. The temperature was maintained in a
temperature chamber. The voice call with Power level 5 in GSM
900 was established with a GSM Tester.
SQ864-GPRS 5V 12V
Terminal switched o 0.01 mA 0.67 mA
On, network connecon (Idle mode) 71 mA 29 mA
On, network connecon voice call (power level 5) GSM 900
235 mA 98 mA
7. Switching the SQ864-GPRS Terminal ON and OFF
The SQ864-GPRS automacally switches on when power is applied
to the terminal . If the unit is then powered o the are two ways to
switch the modem back on again.
• Either assert TO_IN high (1s < t < 2s)
• Acvate the RS232 control line DTR, high for > 0.2s
The modem is fully operaonal aer 4 seconds. Logging onto the
GSM network may take longer than this and is outside the control
of the modem and is network and frequency dependant. The
modem can is congured to automacally turn on at power up.
Once the modem is switched o a posive signal connected to
TO_IN (pin 4) will switch on the modem.
In this case DTR must be used to switch the modem on again aer
it has been switched o or reset, while power is sll applied.
NOTE: DTR must be cycled from low to high.
NOTE: The TO_IN signal requires a posive “edge” (a “sharp” signal
transion from low to high) to turn the modem on. This transion
should be a rising signal from 0V (GND) to VCC, or at least a large
fracon of that voltage range. Very slow transions (signicantly
slower than many milliseconds) or very small transions (e.g. only
a few volts instead of 0V to VCC) will not turn on the module (since
they are not considered to be a “posive edge”).
Although this will not be an issue in almost all typical applicaons
of the modem, under the following condion special design care
has to be taken:
• Large capacitors in your power supply which will lead to
slow leading and falling edges
• Slow analogue signals used to assert TO_IN
Both cases above might prevent the modem from recognizing
the power-up signal this is no failure of the modem itself, the
same would apply to almost any electronic device that provides a
separate “power-on” or “reset” signal.
If you are in doubt, please use the following recommendaons:
• Use Vcc power signal from the AC adapter that is
provided with your unit and is known to work properly
with your modem
• Make sure that your signal and system design adheres to
the recommendaons above
• Consult our support team that will be more than happy
to assist you.
There are three ways to switch o the modem:
• Use the AT#SHDN command
• HR_IN (1s < t < 2s)
• DTR permanently to GND
A delay of up to 10s can be expected for the unit to power o as
the modem logs o the GSM network.
A full system reset, independent of the status of the soware, may
be applied to the modem by applying a 2 to 16V acve pulse to pin
2 of the RJ12 power connector (RESET_IN). Signal must be acve
for at least 200ms then released.

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GPRS Terminal
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8. Dimensions
All dimensions are shown in mm. The mounng holes are suitable for a M3 xing screw.
8.1 Top View
8.2 Serial Connector View
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8.3 Antenna and Power View
8.4 Sim and GPIO Indicator View
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9. Terminal installaon consideraons
There are several condions which need to be taken into
consideraon when designing your applicaon as they might aect
the terminal and its funconality. These are:
Environmental condions: The terminal must be installed so that
the environmental condions stated such as temperature, humidity
and vibraon are sased. Addionally, the electrical specicaons
must not be exceeded.
GSM Signal strength: The terminal/antenna has to be placed in a
posion that ensures sucient GSM signal strength. To improve
signal strength, the antenna can be moved to a more elevated
posion. Signal strength usually depends on how close the modem
is to GSM base staon. You must ensure that the locaon at which
you intend to use the modem is within the network coverage area.
Degradaon in signal strength can be the result of a disturbance
from another source, for example an electronic device in the
immediate vicinity. When the applicaon is operaonal, you can
verify signal strength by issuing the AT command:
AT+CSQ
See “AT+CSQ Signal Strength” in the AT command manual
Tip: Before installing the modem you can use an ordinary mobile
telephone to check the signal strength in each possible installaon
locaon. Sequoia Technology can also provide a GSM signal tester
which provides a full breakdown of the GSM signal received. Please
contact Sequoia Technology for more informaon. hp://www.
sequoia.co.uk
When considering the locaon for the modem and antenna
placement, you must consider received signal strength as well as
cable length as long cable runs can aenuate the received signal
strength.
Connecons of components to SQ864-GPRS: The system
integrator is responsible for the
nal system soluon. If external components are incorrectly
designed or installed it may cause radiaon limits to be exceeded.
For instance, improper cable connecons or incorrectly
installed antennas can disturb the network and lead to terminal
malfuncon.
Network and Subscripon: Before your applicaon is used, you
must ensure that your chosen network provides the necessary
telecommunicaon services. Contact your service provider to
obtain the necessary informaon.
• If you intend to use SMS in the applicaon, ensure this is
included in your subscripon.
• Consider the choice of the supplementary services such
as GPRS, Voice and CSD.

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GPRS Terminal
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10. How to install the terminal
10.1 Power Supply
• Use a high-quality power supply cable with low
resistance. This ensures that the voltages at the
connector pins are within the specied range, especially
during the maximum peak current of approximately 2A.
• When the unit is powered from a baery or a high
current supply, connect a fast 1.25A fuse in line with
the posive supply. This protects the power cabling and
terminal from damage.
10.2 Securing the modem
Before securing the terminal please take into account the amount
of addional space required for the mang connectors and cables
that will be used with the terminal in the applicaon.
• Where access is restricted, it may be easier to connect
all the cables to the modem prior to securing it in the
applicaon.
• Securely aach the SQ864-GPRS terminal to the host
applicaon using two 3mm diameter pan-head screws
11. Safety and Product Care
Please see the informaon in this secon and in secon 8
“Terminal installaon consideraons” before you begin your
system integraon.
11.1 General precauons
The SQ864-GPRS terminal is a standalone item designed for indoor
use only. For use outside it must be installed in a weatherproof
enclosure.
Do not exceed the environmental and electrical limits as specied.
• Avoid exposing the terminal to lit cigarees, naked
ames or to extreme hot or cold temperatures.
• Never try to dismantle the modem. There are no
components inside the modem that can be serviced by
the user. If you aempt to dismantle the modem, you will
invalidate the warranty.
• The SQ864-GPRS terminal must not be installed or
located where the surface temperature of the plasc
case may exceed 85°C.
• All cables connected to the SQ864-GPRS Terminal must
be secured or clamped, immediately adjacent to the
modem’s connectors, to provide strain relief and to avoid
transming excessive vibraon to the modem in the
installaon.
• Ensure the power cable to the SQ864-GPRS terminal
does not exceed 3 metres.
• To protect power supply cables and to meet the re
safety requirements when the unit is powered from a
baery or a high current supply, connect a fast 1.25A
fuse in line with the posive supply.
• Do not connect any incompable component or product
to the SQ864-GPRS terminal.

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11.2 SIM card precauons
Before handling the SIM card in your applicaon, ensure that you
have discharged any stac
electricity. Use standard precauons to avoid electrostac
discharges.
• When designing the SQ864-GPRS into your applicaon,
the accessibility of the SIM card should be taken into
account so that it can be removed or changed.
• 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.
11.3 Antenna precauons
If the antenna is to be mounted outside, always consider the risk of
a lightning strike. Follow the instrucons provided by the antenna
manufacturer.
• Never connect more than one terminal to a single
antenna. The terminal can be damaged by radio
frequency energy from the transmier of another
terminal.
• With all mobile staon equipment, the antenna of the
terminal emits radio frequency energy. To avoid EMI
(electromagnec interference) you must determine if the
applicaon or equipment in the applicaon’s proximity,
needs further protecon against radio emission and the
disturbances it might cause. Protecon is secured either
by shielding the surrounding electronics or by moving the
antenna away from the electronics and external signal
cables.
• The modem and antenna may be damaged if either
come into contact with ground potenals other than
the ground potenal used in your applicaon. Beware,
ground potenals can vary signicantly between
hardware plaorms.
12. Safety Recommendaons
PLEASE READ CAREFULLY
Be sure the use of this product is allowed in the country and in the
environment required. The use of
this product may be dangerous and has to be used with cauon in
the following areas:
• Where it can interfere with other electronic devices in
environments such as hospitals, airports, aircras, etc
• Where there is risk of explosion such as gasoline staons,
oil reneries, gas works etc
It is responsibility of the user to enforce the country regulaon and
the specic environment regulaon.
Do not disassemble the product, any mark of tampering will
compromise the warranty.
We recommend following the instrucons of the hardware user
guide for the correct wiring of the product. The product has to
be supplied with a stabilized voltage source and the wiring has to
conform to the security and re prevenon regulaons.
The product has to be handled with care, avoid any direct contact
with the pins because electrostac discharge may damage the
product. The same precauons have to be observed for the SIM
card installaon. Do not insert or remove the SIM when the
product is in power
saving mode. (AT+CFUN=5)
The system integrator is responsible for the complete funconality
of the nal product. Therefore, care has to be taken with the
external components used with the module, as well as any
installaon issue.
Should there be any doubt, please refer to the technical
documentaon and the regulaons in force.Every module has to be
equipped with a suitable antenna with characteriscs which match
the product requirements.

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The antenna has to be installed with care in order to avoid any
interference with other electronic devices and has to guarantee a
minimum distance from the body (20 cm). In case this requirement
cannot be sased, the system integrator has to assess the nal
product against the SAR regulaon EN 50360.
The European Community provides direcves for the use of
electronic equipments introduced on the market. All the relevant
informaon is available on the European Community website:
hp://europa.eu.int/comm/enterprise/re/dir99-5.htm
Other applicable direcves (Low Voltage and EMC) are available
at:
hp://europa.eu.int/comm/enterprise/electr_equipment/
index_en.htm
13. Conformity Assessment
The SQ864-GPRS terminal conforms to the R&TTE Direcve as a
stand-alone product, so If the terminal is installed in compliance
with the telecom installaon instrucons then no further
evaluaon is required under Arcle 3.2 of the R&TTE Direcve
and no further involvement of a R&TTE Direcve Noed Body is
required for the nal product.
In all other cases, or if the manufacturer of the nal product is in
doubt then the equipment which the SQ864 is integrated with
must be assessed against Arcle 3.2 of the R&TTE Direcve.
In all cases assessment of the nal product must be made against
the Essenal requirements of the R&TTE Direcve Arcles 3.1(a)
and (b), safety and EMC respecvely, and any relevant Arcle 3.3
requirements.
The SQ864-GPRS Terminal conforms with the following European
Union Direcves:
• R&TTE Direcve 1999/5/EC (Radio Equipment &
Telecommunicaons Terminal Equipments)
• Low Voltage Direcve 73/23/EEC and product safety
• Direcve 89/336/EEC for conformity for EMC
In order to sasfy the essenal requisite of the R&TTE 99/5/EC
direcve, the SQ864-GPRS terminal is compliant with the following
standards:
• GSM (Radio Spectrum). Standard: EN 301 511 and 3GPP
51.010-1
• EMC (Electromagnec Compability). Standards: EN 301
489-1 and EN 301 489-7
• LVD (Low Voltage Direcve) Standards: EN 60 950

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14. Revision history
Revision Date Details Editor
0.1 6/10/2010 Inial Dra MC
0.2 8/10/2010 Updated pin out and voltage levels MC
0.3 12/10/2010 Further updates, RS 232 SIM socket and antenna MC
0.4 12/10/2010 Added power-on truth table, GPIO tolerance, SIM pinout PG
2.1 26/10/2010 Added Photos MC
2.1.1 29/10/2010 Added secons 1, 5.3, 5.4, 6, 7, 8, 9, 10, 11, 12 PG
2.1.2 2/11/2010 Added background PG
2.1.3 2/12/2010 Added dimensions PG
2.1.4 26/01/11 Updated Power Table