DCT Syrus+-+Recommended Protection (en)

7/22/2019 DCT Syrus+-+Recommended Protection (en)

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Digital Communications Technology

Recommended Protection for

Syrus GPSGeneral Care & Caution for FW 1.XX.XX / 2.XX.XX

DCTJuly, 2012


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www.digitalcomtech.com P a g e | 2

Contents

Overview ......................................................................................................................................... 3

Document History ........................................................................................................................... 3

Inputs & Outputs ............................................................................................................................. 3

General Care and Caution ............................................................................................................... 4

How to remove the SIM Card ..................................................................................................... 4

How to remove the internal battery (Syrus 2) ............................................................................. 4

Set up the correct PIN for the SIM card. .................................................................................... 4

Do Not Leave Wires Unprotected............................................................................................... 4

Recommended Protection ............................................................................................................... 5

Main Power (Pins 9 & 1)Syrus 1 Only ................................................................................... 5

Inputs Detection .......................................................................................................................... 7

Outputs ........................................................................................................................................ 8

Dropping Voltages .................................................................................................................. 9

Connection Diagrams.................................................................................................................... 10

Panic Button .............................................................................................................................. 10

Ignition Detection ..................................................................................................................... 10

Kill Switch/Safe Engine Cut-Off Diagram ............................................................................... 11

Fuses ............................................................................................................................................. 12

Operating Temperatures................................................................................................................ 13

External Links and Useful Guides ................................................................................................ 13

END OF DOCUMENT................................................................................................................. 14


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Overview

The following guide is intended for the general protection of the Syrus GPS Tracking Device.

Unless otherwise stated it is for both Syrus 1 & 2 FW versions.

Document History

Revision Comments

Inputs & Outputs

Obtained from the Syrus device manual (FW 1.3.57 and 1.3.61):here

Username:syrhelp

Password:syrdocs

001 07/15/2012 First Release

002 07/17/2012 Added Fuses and 24V Connection Diagrams
http://dctserver.com/syr/http://dctserver.com/syr/http://dctserver.com/syr/http://dctserver.com/syr/


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General Care and Caution

How to remove the SIM Card

Always send an >SRTSRT< command) via Serial port. - Remove SIM card after sending the >SRT< command.

That means, you have around 10 seconds to remove the SIM card.

How to remove the internal battery (Syrus 2)

Always send an >SRTSRT< command) via Serial port. - Remove the battery after sending the >SRT< command. That means, you have around

10 seconds to remove the battery.If the external power supply is connected, the battery can be replaced without sending the>SRT< command.

Set up the correct PIN for the SIM card.

The SIM card may be blocked if the PIN parameter is configured using the>SRFI


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Recommended Protection

Main Power (Pins 9 & 1) Syrus 1 Only

Protect the Syrus against transient voltage (which are common on vehicles) by

connecting a P6KE36CA diode on the Syrus power supply cables. This diode must be connected

as close as possible to the unit's power supply connector. The diode must be connected between

GND (pin 1) and MPOWER (pin 9). Since the diode does not have a polarity it can be connected

in any direction between those pins.

More information about transient responses can be found:here

English&SpanishWikipedia Articles.

P6KE36CA -Datasheet

Connection Diagrams:
http://www.littelfuse.com/data/en/Application_Training/TVS_Diode_Applications_Training.pdfhttp://www.littelfuse.com/data/en/Application_Training/TVS_Diode_Applications_Training.pdfhttp://www.littelfuse.com/data/en/Application_Training/TVS_Diode_Applications_Training.pdfhttp://en.wikipedia.org/wiki/Transient_(oscillation)http://en.wikipedia.org/wiki/Transient_(oscillation)http://es.wikipedia.org/wiki/R%C3%A9gimen_transitorio_(electr%C3%B3nica)http://es.wikipedia.org/wiki/R%C3%A9gimen_transitorio_(electr%C3%B3nica)http://es.wikipedia.org/wiki/R%C3%A9gimen_transitorio_(electr%C3%B3nica)http://www.st.com/internet/com/TECHNICAL_RESOURCES/TECHNICAL_LITERATURE/DATASHEET/CD00000720.pdfhttp://www.st.com/internet/com/TECHNICAL_RESOURCES/TECHNICAL_LITERATURE/DATASHEET/CD00000720.pdfhttp://www.st.com/internet/com/TECHNICAL_RESOURCES/TECHNICAL_LITERATURE/DATASHEET/CD00000720.pdfhttp://es.wikipedia.org/wiki/R%C3%A9gimen_transitorio_(electr%C3%B3nica)http://en.wikipedia.org/wiki/Transient_(oscillation)http://www.littelfuse.com/data/en/Application_Training/TVS_Diode_Applications_Training.pdf


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Outputs

The unit has 2 discrete outputs located on the I/O molex-type connector. The outputs areOpen-Drain type with no internal pull-up resistor.

Meaning that the user has to provide a pull-up resistor to any positive voltage (30V max.)

to detect an inactive output by voltage. Each output can drive a continuous current of 2A.

The electrical conditions are:

Logical State Electrical State

Active 0V

InactiveOpen or pull-up voltage

(max 30V)

If the output is used for

cutting/restoring GND, a direct connection

can be used. For example when driving a

LED:

If the output is used for

cutting/restoring a positive voltage on a high

current device, like for example the vehicle's ignition wire, an external device like a relay o highcurrent transistor must be used. See the Connection Diagrams for an example of this connection.

To test the connection via the Serial Port you can send the following commands to the device

usingSyrusDesk:>SRT;CONFIGSDA0;P15SED20NV0;XP1+;ACT=STXOutput 1 ActiveSED30NV0;XP1-;ACT=STXOutput 1 InactiveSED21NV0;XP2+;ACT=STXOutput 2 ActiveSED31NV0;XP2-;ACT=STXOutput 2 Inactive

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DCT Syrus+-+Recommended Protection (en)