Revision history Table of revisions
Date Changed Rev
March 2016 Engineering Tomorrow 0203
January 2015 Updates BB
November 2014 Review BA
June 2014 First edition AA
Technical Information
WS 403 Remote Solution
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Danfoss | March 2016 L1426375 | BC00000241en-US0203
About this manual
Device elements
Device information.......................................................................................................................................................................... 6
Type label............................................................................................................................................................................................6
Intended use...................................................................................................................................................................................... 7
WS 403 family of telematics units...............................................................................................................................................8
Available models.............................................................................................................................................................................. 8
Cables and antennas..................................................................................................................................................................8
WS Kits.............................................................................................................................................................................................8
Software..........................................................................................................................................................................................9
Service and support.........................................................................................................................................................................9
Product conformity
WS 403............................................................................................................................................................................................... 10
Compliance with CE.................................................................................................................................................................10
Compliance with E1.................................................................................................................................................................10
Compliance with FCC..............................................................................................................................................................10
PLUS+1
®
Compliant..................................................................................................................................................................10
Safety information
General information......................................................................................................................................................................11
Safety advice....................................................................................................................................................................................11
General......................................................................................................................................................................................... 11
Health care..................................................................................................................................................................................11
Air traffic.......................................................................................................................................................................................12
Explosives....................................................................................................................................................................................12
Antennas......................................................................................................................................................................................12
Electronic equipment..............................................................................................................................................................12
Avoidance of property damage................................................................................................................................................12
FCC notice.........................................................................................................................................................................................13
Warranty and liability....................................................................................................................................................................14
Device functions
Wireless solution............................................................................................................................................................................ 15
GPS...................................................................................................................................................................................................... 15
GPRS/EDGE/3G/HSDPA................................................................................................................................................................15
Operating modes...........................................................................................................................................................................15
Real-time mode.........................................................................................................................................................................15
Data logging / File-transfer mode......................................................................................................................................15
WS 403 functionalities
MCU, RTC and external memory...............................................................................................................................................16
CAN Interface...................................................................................................................................................................................16
Mobile connection ........................................................................................................................................................................16
GNSS connection........................................................................................................................................................................... 17
3-axis accelerometer.....................................................................................................................................................................17
Interface for micro-SD card........................................................................................................................................................ 17
Connectors
Main connector...............................................................................................................................................................................19
5-pin M12 CAN/power connector............................................................................................................................................19
GSM/3G connector........................................................................................................................................................................19
GPS connector.................................................................................................................................................................................20
Indicator elements
CAN LED states................................................................................................................................................................................21
ON LED states..................................................................................................................................................................................21
GSM/3G LED states........................................................................................................................................................................22
GPS LED states........................................................................................................................................................................... 22
Technical drawings
WS 403............................................................................................................................................................................................... 24
Technical Information
WS 403 Remote Solution
Contents
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WS 403 technical data
Mechanical data............................................................................................................................................................................. 25
Electrical data.................................................................................................................................................................................. 25
Interface / Protocols / Certifications........................................................................................................................................25
Additional features........................................................................................................................................................................25
Protocols........................................................................................................................................................................................... 26
Troubleshooting
Tests
EMC tests...........................................................................................................................................................................................28
Electrical loads.................................................................................................................................................................................28
Temperature / climate tests.......................................................................................................................................................28
Shock / vibration tests..................................................................................................................................................................29
Packaging and transport
European Union
Technical Information
WS 403 Remote Solution
Contents
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Danfoss | March 2016 L1426375 | BC00000241en-US0203
This document is part of the product and provides important information on the intended use, safety,
installation and operation of the device(s) described below. The manual is intended for qualified
personnel and electricians with advanced knowledge in electrical engineering and fieldbus systems,
allowing them to estimate the risks and hazards of operating the device and to integrate it into systems
with components of other manufacturers.
Technical Information
WS 403 Remote Solution
About this manual
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Danfoss | March 2016 L1426375 | BC00000241en-US0203 | 5
This chapter gives an overview of the device elements and functions and also describes the intended use.
It further lists the available device variants and the product certifications.
Device information
The device elements WS 403 is showed in the figure below:
1. 'Power/CAN connector'
2. GSM/3G connector
3. GPS connector
4. Mounting holes
5. Aluminum enclosure
6. GPS LED
7. GSM/3G LED
8. ON LED
9. CAN LED
10. Front label
11. Enclosure screws
12. Type label
Type label
The WS403 type label is located at the bottom of the enclosure and provides the following information:
Technical Information
WS 403 Remote Solution
Device elements
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Danfoss | March 2016 L1426375 | BC00000241en-US0203
1. Device name and type
2. Product number
3. Power supply
4. International Mobile Station Equipment Identity (IMEI) number
5. CAN specification
6. Certifications
7. Traceability codes
8. Serial number
9. Hardware version
10. IMEI code
11. Disposal requirements
W
Warning
The device’s type label contains important information.
•
Do not remove the type label.
Solvents can destroy the imprint
•
Do not contact the type label with any solvent-containing substance.
Intended use
W
Warning
Danger due to possibly deficient data transmission WS403 operates using radio signals and cellular
networks and is not authorized for use in safety-related applications.
Deficient network coverage, failure or malfunction of the device may lead to deficient data transmission.
Because of this, connection cannot be guaranteed at all times under all conditions.
•
Do not operate the device in machines and applications where life depends on the proper operation
of this piece of equipment.
•
Never rely solely upon any wireless device for essential communications.
•
This device is designed to be used in systems which must be checked for conformity with legal
requirements prior to placing into operation. The integrator of this device is responsible to check and
comply with regional directives and requirements.
The OEM of a machine or vehicle in which PLUS+1
®
or others electronic controls are installed has the full
responsibility for all consequences that may occur.
•
Danfoss has no responsibility for any consequences (direct or indirect) caused by failures or
malfunctions.
•
Danfoss has no responsibility for any accidents caused by incorrectly mounted or maintained
equipment.
•
Danfoss does not assume any responsibility for PLUS+1
®
products being incorrectly applied or the
system being programmed in a manner that jeopardizes safety.
•
All safety critical systems shall include an emergency stop to switch off the main supply voltage for
the outputs of the electronic control system. All safety critical components shall be installed in such a
way that the main supply voltage can be switched off at any time. The emergency stop must be easily
accessible to the operator.
•
A system FMEA should be performed on all applications.
WS403 interfaces are designed for transmitting data that is available within a CAN network via GSM/
GPRS, additionally via EDGE/3G/HSDPA/HSUPA.
The interfaces are suitable for use in mobile and stationary systems for industry, small business area, and
in agricultural and forestry machinery. They feature an easy-to-install aluminum enclosure which can be
bolted to a panel or mounted to a DIN rail TS35.
WS403 devices are IP 65-rated, i.e. protected against contact as well as ingress of dust and against water
jets against the enclosure (tested under defined conditions of pressure and time).
Technical Information
WS 403 Remote Solution
Device elements
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Danfoss | March 2016 L1426375 | BC00000241en-US0203 | 7
IP 65 protection is only ensured if all connectors are plugged in:
•
Before exposing the device to dust and water, plug in all connectors.
•
Do not immerse the device in water or other liquids.
WS 403 family of telematics units
The WS 403 is a family of telematics devices
WS A B
WS Wireless Solutions
A Communication and functionalities
40 Wireless CAN interface for data transmission via GSM/GPRS/EDGE and UMTS/HSDPA + GPS tracking
B Country
3 Worldwide
Available models
WS403 is available with various options. The field B of the name designate the different variants for
country. The field A of the name designate the presence of GPS and other extra functionalities available
on request.
You can find this name extension on the type label on the WS unit.
The tables below list the part numbers of the devices covered in this manual.
Device Descriptions Part number
WS403 CONTROL, CANlink WS403 (UMTS) with GPS 11156350
Cables and antennas
Accessories
Product number
Antenna GSM/GPS
ANT GSM QB UMTS GPS K 3M0 FME-F SMA-M FA
11149644
Power I/O cord set
M12 5pin socket / open - 5m cable
11149645
WS Kits
WS403 are also available as a Kit encompassing the following components:
Device Descriptions Part number
WS403 Kit WS403 11157545
ANT GSM QB UMTS GPS K 3M0 FME-F SMA-M FA
CAN-Cable M12 5-pol /open 5m
On the Danfoss website, you will find documentation and the WS System Tools: various software tools for
configuring and deploying the WS device.
Technical Information
WS 403 Remote Solution
Device elements
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Software
WS System Tools Product information
WS Configurator Download the program from the Danfoss Power
Solutions website
www.powersolutions.danfoss.com
WS FW Programmer
Service and support
The most recent driver, firmware, tools and documentation versions are available for download from the
website.
For further information see our website: http://powersolutions.danfoss.com/solutions/telematics/
or contact our support team: email [email protected]
Technical Information
WS 403 Remote Solution
Device elements
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WS 403
Compliance with CE
This device complies with the directives, standards, and normative documents. Directive
2014/53/EU on Radio equipment and telecommunications terminal equipment
Directive 2004/108/EC on Electromagnetic compatibility
Immunity standard for industrial environments (EN 61000-6-2 (2006)
Emission standard for industrial environments (EN 61000-6-3 (2007)
Compliance with E1
E
1
This device has been approved by the KBA (Kraftfahrt-Bundesamt, Federal Office for Motor Traffic)
to comply with Regulation No. 10. ECE Regulation No. 10 (Revision 3, 14/08/2008) Approval No.: 10 R
- 036578
Compliance with FCC
This device complies with Part 15 of the FCC Rules. Operation is subject to the following two
conditions:
1. this device may not cause harmful interference
2. 2. this device must accept any interference received, including interference that may cause
undesired operation
Contains transmitter FCC ID: UDV-0912142009007
FCC Part 15/47 CFR Ch I (10-01-2010) Conducted Emission Limits
FCC Part 15/47 CFR Ch I (10-01-2010) Radiated Emission Limits regarding Part 15 of the FCC-rules
(Class B digital devices)
PLUS+1
®
Compliant
Danfoss Telematics Solutions are compliant with PLUS+1
®
System Control Platform.
Allow all PLUS+1
®
Service Tool functionalities to be executed remotely and additionally Danfoss
Telematics features are added in the Remote Interface (Machine information, signal strength,
geographical position linked to Google Maps, CAN Status, Safety mechanism).
Technical Information
WS 403 Remote Solution
Product conformity
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In this chapter, you will find important information on how to avoid life-threatening situations and
injuries and how to prevent product damage.
General information
These instructions are part of the device.
They contain text and illustrations for the correct handling of the module and must be read before
installation or use.
Before deploying the device described in this document, read the entire manual including all safety
information.
Non-observance of the notes, operation that is not in accordance with use as prescribed below, wrong
installation or handling can result in serious harm concerning the safety of people and plant.
Keep this manual for future use and make all information available to anyone deploying the device, even
after installation.
Tampering with the device can lead to considerable risks for the safety of people and plant. It is not
permitted and leads to an exclusion of any liability and warranty claims.
The device must be installed, connected and put into operation by a qualified electrician.
In the event of malfunctions or uncertainties, please contact the manufacturer.
This device is designed to be used in systems which must be checked for conformity with legal
requirements prior to placing into operation. The integrator of this device is responsible to check and
comply with regional directives and requirements.
Safety advice
General
Danger due to possibly deficient data transmission.
WS unit operates using radio signals and cellular networks and is not authorized for use in safety-related
applications.
Deficient network coverage, failure or malfunction of the device may lead to deficient data transmission.
Because of this, connection cannot be guaranteed at all times under all conditions.
•
Do not operate the device in machines and applications where life depends on the proper operation
of this piece of equipment.
•
Never rely solely upon any wireless device for essential communications.
Health care
Danger of interference caused by RF energy.
Medical equipment may be sensitive to RF energy.
•
When in a hospital or other health care facility, observe the restrictions on the use of cellular
communication equipment.
•
Switch WS unit off, if instructed to do so by the guidelines posted in sensitive areas.
The operation of cardiac pacemakers, other implanted medical device and hearing aids can be affected
by interference from WS unit's antennas placed close to the device.
•
If in doubt about potential danger, contact a physician or the manufacturer of the implanted medical
device to verify that it is properly shielded.
•
Pacemaker patients are advised to keep WS unit and its antennas away from the pacemaker while it is
on.
Technical Information
WS 403 Remote Solution
Safety information
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Air traffic
Danger of interference caused by RF energy.
The operation of wireless appliances in an aircraft is forbidden to prevent interference with
communications systems. Failure to observe these instructions may lead to the suspension or denial of
cellular services to the offender, legal action, or both.
•
Switch off WS unit before boarding an aircraft.
•
Make sure it cannot be switched on inadvertently.
Explosives
Danger of explosion.
The device does not comply with Directive 94/9/EC and must therefore not be used in potentially
explosive areas.
•
Observe the applicable regulations and precautions when you are near explosive areas (i.e. petrol
stations, fuel depots, chemical plants or where blasting operations are in progress).
•
Do not mount the antenna in the close environment of fuel tanks, vessels with explosives and
insufficiently shielded electronic devices.
Antennas
Danger due to absorption of RF energy.
Mobile communication devices may pose a health risk when operated in the close proximity of persons.
•
Install the antenna(s) used for the WS unit devices to provide a separation distance of at least 20 cm /
8 inches from all persons.
•
Do not operate them in conjunction or co-locate them with any other antenna or transmitter.
Electronic equipment
Danger of interference caused by RF energy
WS unit receives and transmits radio frequency energy while switched on. Interference may occur if it is
used close to TV sets, radios, computers or inadequately shielded equipment.
Follow any special regulations and always switch off the WS unit wherever forbidden, or when you
suspect that it may cause interference or danger.
Avoidance of property damage
W
Warning
Before any installation of the Control system can take place, make sure the ignition lock is turned off and
the battery is disconnected. Disconnect the device externally before handling it. Also disconnect any
independently supplied output load circuits.
Connecting of Supply Voltage
The supply voltage, should be within the operating range. Connect the supply voltage to power supply.
Protect the module by using a fuse. Requisite fuse level should be 1 A, fast (F). To avoid damage to the
device, connect/disconnect the main connector only if the power supply to the device is switched off.
Connect the WS to the same power and ground as the Control system. The power supply must be
common to both the WS and the Control unit to ensure trouble free communication. Most importantly,
the ground connection, must be the same.
Do not use the chassis as the negative terminal.
Polarity reversal
Technical Information
WS 403 Remote Solution
Safety information
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Danfoss | March 2016 L1426375 | BC00000241en-US0203
The WS module is protected against power supply polarity reversal, provided an external fuse, max 1 A
(Fast) is being used. If this fuse is not used, polarity reversal can damage the unit. Do not connect the
housing to Ground externally. This will suspend the reverse voltage protection of the power supply.
W
Warning
Applying a reversed voltage in this case will destroy the supply circuits. Do not mount the housing of the
antenna to ground or this will create shortcut to ground for the housing.
IP 65 protection is only ensured if all connectors are plugged in.
•
Before exposing the device to dust and water, plug in all connectors.
•
Do not immerse the device in water or other liquids.
The maximum torque for fixing the enclosure screws is 1.5 Nm.
•
When opening/closing the enclosure, do not exceed this value.
•
The device can only be repaired by the manufacturer.
Welding
•
Should be done before the installation of the control system. If welding has to be done afterwards,
the electrical connections on the system must be disconnected from other equipment, the negative
cable must always be disconnected from the battery before disconnecting the positive cable, the
ground wire of the welder shall be positioned as close as possible to the place of the welding and the
cables on the welding unit shall never be placed near the electrical wires of the control system.
Operation without antennas can destroy the radio modem.
•
Do not operate the device without antennas.
•
To prevent misuse immediately inform your network operator in case of loss or theft of the SIM card
or the radio modem.
FCC notice
The devices covered in the manual may only be used in mobile or stationary systems in which under
normal operating conditions the separation distance between the antenna(s) and all persons is at least 20
cm (approx. 8 inches). The antenna(s) must further not be co-located or operated in conjunction with any
antenna or transmitter.
According to FCC requirements, the antenna gain, including cable loss, must not exceed the limits of 7.3
dBi in the 850 MHz Cellular band and 12.7 dBi in the PCS 1900 MHz band (WS devices) or 7.2 dBi in the
850 MHz cellular band and 3.5 dBi in the PCS 1900 MHz band respectively (WS devices).
Compliance of WS unit devices in all final product configurations is the responsibility of the integrator.
This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant
to part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful
interference in a residential installation. This equipment generates, uses and can radiate radio frequency
energy and, if not installed and used in accordance with the instructions, may cause harmful interference
to radio communications. However, there is no guarantee that interference will not occur in a particular
installation. If this equipment does cause harmful interference to radio or television reception, which can
be determined by turning the equipment off and on, the user is encouraged to try to correct the
interference by one or more of the following measures:
•
Reorient or relocate the receiving antenna.
•
Increase the separation between the equipment and receiver.
•
Connect the equipment into an outlet on a circuit different from that to which the receiver is
connected.
•
Consult the dealer or an experienced radio/TV technician for help.
Modifications not expressly approved by the manufacturer could void the user's authority to operate the
equipment under FCC rules.
Technical Information
WS 403 Remote Solution
Safety information
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Warranty and liability
We assume no liability for defects caused by normal wear, external influences, and errors of installation,
operating or maintenance. This also applies if the customer itself or third parties without our approval
modify the components of our products (e.g. devices, elements or additional hardware facilities;
programs or program elements of the software).
Technical Information
WS 403 Remote Solution
Safety information
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Wireless solution
WS403 interfaces transmit data available on a CAN bus via GSM telecommunication services and GPRS. In
addition to data transmission via GSM/GPRS, the WS devices use the EDGE, 3G and HSDPA standards to
reduce data transmission latency and to improve data transfer rate.
GPS
The device includes a GPS receiver for determining position data.
The GPS enables the devices to determine their position using the Global Positioning System. The
position data can then be transmitted via GSM/3G to another GSM/PSTN/ISDN/3G device, or made it
available to the connected CAN bus system.
GPRS/EDGE/3G/HSDPA
All WS403 devices feature GPRS/ EDGE/3G/HSDPA services. Beyond the GSM functionality, these services
allow for communication with web servers at higher data rates. The communication is based on the
TCP/IP protocol. Using these services requires a connection to a specific Danfoss server.
Operating modes
WS devices can be operated in the following modes:
•
Real-time mode
•
Data Logging / File Transfer mode
Real-time mode
CAN messages are received by the device and sent via the Danfoss Web portal server to the remote PC.
On this computer there may be an analysis software which can handle the CAN messages. A bi-
directional data transfer is possible. When higher layer protocols are used, a special firmware and
software adaptation may be necessary due to the delay times caused by the GSM/3G network. For this
operation a permanent connection (GSM/3G coverage) is necessary.
Data logging / File-transfer mode
In this operation mode the WS unit logs specific CAN messages and GPS position data according to its
configuration and sends them in a special format to the Danfoss server. The WS devices have an internal
non-volatile memory which allows to store the files in case of a GSM outage. When the connection is
recovered the files are sent to the server automatically.
Technical Information
WS 403 Remote Solution
Device functions
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MCU, RTC and external memory
The device has a 32 bit microcontroller ARM Cortex M4.
•
can be clocked up to 168MHz
•
extensive peripheral 1MB NOR flash as code memory
•
192KB SRAM for data storage and a real-time clock, which is buffered by a super capacitor (backup
time> 48h @ 25 °C ).
•
Synchronization: GNSS/DTS portal Accuracy: +2.5 s/day
in addition, the unit is equipped with various external memories:
•
SRAM, 512KB volatile memory, connection via 16-bit data bus access time <= 45ns, optionally
buffered super capacitor (backup time> 48h @ 25 °C)
•
Serial FRAM, 16KB of non-volatile, cyclic writable memory for storing variables (e.g. operating hours
counter), 10 ^ 12 write cycles
•
Serial NOR Flash, 32 MB of non-volatile memory for storing configurations and place of logging data,
10 ^ 5 write cycles.
The dimensioning the memory size allows sufficient reserves to implement additional firmware features
at a later date.
CAN Interface
WS503/WS503-BP features two CAN interfaces. Communication through various CAN protocols such as
CANopen, J1939, is possible.
The CAN interface meets the specification CAN 2.0 A/B protocol and the physical layer according to ISO
11898-2 high-speed up to 1 Mbit/s.
Support for CAN-FD is not available.
The CAN interface is operational only when power supply is energized.
Mobile connection
The WS unit is equipped with an HSPA/UMTS/GSM/GPRS/EDGE module. It is used instead of the previous
dual-band UMTS. Integrated into the device is a SIM card slot and the network operator SIM card. The SIM
card remains internally in the housing. Inserting the SIM card is only possible by unscrewing the housing.
Furthermore, an embedded SIM is provided which can be used on a Sim card switching. It can only ever
be either posted at the same time the replaceable SIM card or embedded SIM in the mobile network.
Switching between two SIM card requires a restart the whole device.
The functionality depending on the ambient temperature can be assured for the maximum transfer rate
in the HSPA standard only between -38 °C to 55 °C.
For the frequency band cover a GSM quad-band and UMTS band six-module is used, which covers all
GSM frequency bands and the main UMTS frequency bands worldwide.
Supported frequency bands
- GSM/GPRS/EDGE
850 / 900 / 1800 / 1900 MHz
- UMTS/HSPA
800 / 850 / 900 / 1700 / 1900 / 2100 MHz
Supported transmission rates
Supported transmission rates
Upload Download
GPRS
85.6 Kbit/s 85.6 Kbit/s
Technical Information
WS 403 Remote Solution
WS 403 functionalities
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Supported transmission rates (continued)
EDGE
236 Kbit/s 236 Kbit/s
UMTS
384 Kbit/s 384 Kbit/s
HSDPA
- 7.2 Mbit/s
HSUPA
5.7 Mbit/s
GNSS connection
The WS unit has an integrated GNSS receiver for position determination that supports the GNS systems
GPS, GLONASS and Galileo in the future via firmware update when it is ready. The latest version of GNS
systems allows simultaneous viewing of two GNS-systems and additionally supports the Chinese GNS-
system BeiDou.
The RF signal from the active GNSS receiver antenna is connected via a SMA connector at the same time,
the active antenna is supplied through this connector.
3-axis accelerometer
The device has a 3-axis accelerometer that can measure continuous acceleration values in the normal
fashion:
•
Measuring range > = ± 16g
•
Resolution > = 10 bit
•
sampling rate > = 10Hz
•
tolerance < = 2% of full-scale value (@ 25 °C)
The acceleration sensors register and evaluate accelerations in the X, Y, and Z axes, and send them via the
CAN bus.
The axis reference versus are showed in the following image:
P301 770
Interface for micro-SD card
The micro-SD card interface remains internally in the housing.
Technical Information
WS 403 Remote Solution
WS 403 functionalities
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Danfoss | March 2016 L1426375 | BC00000241en-US0203 | 17
Inserting the micro-SD card is only possible by unscrewing the housing.
The micro SD card is connected via SDIO to the MCU. There are both micro-SD and microSDHC cards.
Technical Information
WS 403 Remote Solution
WS 403 functionalities
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WS403 is equipped with the following connectors:
•
1x Main connector
•
1x GSM connector
•
1x GPS connector
Main connector
The main connector serves for
•
connecting the WS device to the CAN bus network
•
supplying the WS device with power
Therefore, WS403 has to be connected to the CAN bus network in order to operate.
W
Warning
•
Do not connect the housing to Ground externally. This will suspend the reverse voltage protection of
the power supply. Applying a reversed voltage in this case will destroy the supply circuits.
•
To avoid damage to the device, connect/disconnect the main connector only if the power supply to
the device is switched off.
•
To maximize the performance of the GPS receiver, mount the GPS antenna in a place where it is level
with the local geographic horizon and has full view of the sky above. If you are using separate
GSM/3G and GPS antennas, mounting them at least 2 meters away from each other will also help to
improve the GPS performance.
5-pin M12 CAN/power connector
The table and drawing below show the pin assignment of the 5-pin M12 connector. The colors stated in
the table below are the conductor colors of the cable listed in the section Accessories and provided in the
WS Kit.
CAN/power connector 5-pin M12, male, A-coded, front view
Pin Designation Color Description
5
21
4
3
P301 764
1 Ground Brown Power supply
2 VCC 6 … 32 V DC White Power supply
3 n.c. (not connected) Blue
4 CAN-High Black CAN
5 CAN-Low Grey, green CAN
GSM/3G connector
GSM/3G connector FME, male, front view
Pin Designation Description
P301 765
2
1
1 Signal GSM/3G
2 Ground Shield/housing
Technical Information
WS 403 Remote Solution
Connectors
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GPS connector
GPS connector SMA, female, front view
Pin Designation Description
P301 766
2
1
1 Signal GSM/3G
2 Ground Shield/housing
Technical Information
WS 403 Remote Solution
Connectors
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