GARDASOFT VTR1 Manuale utente
USER MANUAL
VTR1 Strobe Light
Revision 4
Gardasoft Vision Ltd
Trinity Court, Swavesey
Cambridge, CB24 4UQ. UK
Tel: +44 1954 234970
Fax: +44 1954 231567
Web: www.gardasoft.com
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1Disclaimer
Except as prohibited by law:
All hardware, software and documentation is provided on an “as is” basis. This information
is for guidance only. Installers must perform their own risk assessment specific to each
installation.
It is essential that the user ensures that the operation of the product is suitable for their
application.
The user must ensure that incorrect functioning of this equipment cannot cause any
dangerous situation or significant financial loss to occur.
Deliberate acts of endangerment and vandalism are not covered by this document and must
be considered by the installer.
While care has been taken in the preparation of this document Gardasoft Vision Ltd and
Gardasoft Products Ltd will not accept any liability for consequential loss of any kind
except those required by law.
All trademarks acknowledged. Hardware, software and documentation are Copyright 2002 –
2013 Gardasoft Products Ltd. Hardware manufactured by Gardasoft Vision Ltd under licence.
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2Getting Started
Read the sections on Safety (Sections 3 and 4) and Specifications (Appendix A) and check the
VTR1 fulfils your requirements. See the back cover for other Gardasoft Vision strobe lights.
Mount the VTR1 as described in Section 4. Connect the VTR1 up to a supply as described in
Connections (Section 5). Set up the VTR1 for the desired operation as described in Configuration
Commands (Section 9).
Visit www.gardasoft.com for application notes on this product. There is also a Support page
which has information on troubleshooting problems.
2.1 Summary of Features
Throughout this manual, references to the VTR1 refer to all variants in the VTR1 range unless
otherwise stated. The convention for the part number is:
VTR1-mm-www-aa-ccc
where:
mm M for master only, MS for master/slave pair
www Wavelength of light in nanometres: 740, 850, 940, W (white)
aa Beam angle in degrees: 12 or 30
ccc Communications: ETH, RS232
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3Safety
Read this before using the VTR1. Always observe the following safety precautions. If in doubt,
contact your distributor or Gardasoft Vision. The following symbols mean:
Warning: read instructions to understand possible hazard
Warning: Possible hazardous voltage
Warning: Surface may get hot
Where these symbols appear in the manual, refer to the text for precautions to be taken.
3.1 Heat
The VTR1 can dissipate up to 5W. It should be positioned away from flammable
materials.
Read the section on “Mounting the VTR1 (Section 5). Do not exceed the power ratings given in
the manual.
3.2 Electrical
The internal circuit exceeds 46.7V but should not exceed 60V. Pulse peak voltages
above 46.7V are considered hazardous. Do not have the cover removed with the
power on. Do not open the cover within 1 minute of turning the power off.
The VTR1 does not have complete tracking isolation of inputs and outputs.
3.3 General
The VTR1 must not be used in an application where its failure could cause a danger to
personal health or damage to other equipment.
If the equipment is used in a manner not specified by the manufacturer, the protection provided
by the equipment may be impaired.
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4VTR1 Eye Safety
4.1 The VTR1 has been classified for eye safety according to IEC62471, as follows:
VTR1 740nm versions Risk Group Exempt
VTR1 850nm versions Risk Group 1
VTR1 940nm versions Risk Group 1
VTR1 white versions Risk Group 2
4.2 Disclaimer
This information is for guidance only. Installers must perform their own risk assessment specific
to each installation. While Gardasoft Vision has taken every care in the provision of this
information, Gardasoft Vision and Gardasoft Products accept no liability for damages of any
kind, except those required by law.
Deliberate acts of endangerment and vandalism are not covered by this document and must be
considered by the installer.
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5Mounting the VTR1
5.1 Heatsinking
The approximate heat dissipation of the VTR1 can be calculated as follows:
HD = 0.25 * BR * PW * TF + 2
Where:
HD Heat dissipation (W)
PW Strobe pulse width (seconds)
TF Maximum trigger frequency (Hz)
BR Brightness of the light output (%)
Given the range of ambient temperatures and radiated sunlight, the installation must provide
enough heatsinking on the rear surface to keep the internal temperature of the VTR1 below 70oc.
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6Connections
See the Specification (Appendix A) for information on connection ratings.
Assembled cables are available from Gardasoft Vision to the customer’s specification.
All connections are provided on a 10 core cable. The wire allocation depends on the options
provided.
Wire Colour Ethernet
version RS232 version
Black Power Supply − Power Supply −
Red Power Supply + Power Supply +
White TRGI −TRGI −
Brown TRGI +TRGI +
Grey Ethernet TX+ No connect
Pink Ethernet TX−
RS232 TX
(output from VTR1)
Yellow Ethernet RX+RS232 RX
(input to VTR1)
Green Ethernet RX− RS232 GND
Orange TRGO−TRGO−
Purple TRGO+TRGO+
6.1 Power Supply
Choose a PSU that limits its output current by design, by setting the current limit on the supply
(if this feature exists) or use fuses. Remember to derate the fuse, if mounted in an enclosure, as
the temperature will be higher than ambient. The external power supply will need to be able to
supply at least 1A.
The use of a regulated power supply with 100% short circuit protection is recommended. If
however a non-regulated power supply is used, then the maximum ripple voltage of this power
supply must not exceed 10% of the actual DC value.
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Low voltage and mains wiring should be routed separately. If they must be loomed together
ensure that low voltage insulation rating is sufficient or that supplementary insulation is used.
Power supply cable length is recommended not to exceed 3m. If longer cables are fitted, or if
surge or transient interference greater than +/-60V may occur on the power supply lines,
additional surge protection should be provided.
6.2 Trigger Input Option
There is an optional opto-isolated trigger input. The opto-isolator isolates voltages up to 50V.
Signal Function
TRGI –ve Trigger input –ve.
TRGI +ve Trigger input +ve.
The trigger input circuit is as follows:
The trigger input circuit operates as follows:
When a voltage of 5V to 24V is applied across TRGI –ve and TRGI +ve, the trigger input is
logic 1 (on). When a voltage of 0V to 2V is applied across TRGI –ve and TRGI +ve, the trigger
input is logic 0 (off).
The trigger input takes about 3mA at all voltages from 5V to 24V.
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6.3 Trigger Output Option
There is an optional trigger output which is opto-isolated. The opto-isolator only isolates voltages
up to 50V.
Signal Function
TRGO –ve Trigger input –ve.
TRGO +ve Trigger input +ve.
The trigger output circuit is as follows:
The trigger output can be used to switch a signal of up to 24V, switching up to 20mA when on.
When the output is logic 1 (on) a current of up to 20mA can flow. The maximum current must be
limited to 50mA by the external circuit. The forward voltage is less than 2V.
When the output is logic 0 (off) a voltage of up to 24V can be blocked.
6.3.1 Ethernet Option
The Ethernet connection is 10BaseT operating at 10Mbits per second.
6.3.2 Serial Option
The RS232 connections are as follows. The communications port should be set to 115Kbaud, no
parity, 8 data bits and 1 stop bit.
Connecting to the specified pin on a 9-way female D-type will allow straight through connection
to a PC COM port.
Signal Function Connection pin on a
standard PC 9-way Female
D-Type
GND Connected to power input –ve 5
RX Receive input to VTR1 3
TX Transmit output from VTR1 2
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7General Description
The VTR1 current controller provides repeatable intensity and timing control for strobe lighting.
Two modes of operation are provided for the light output:
Pulse (Strobe):
In pulse mode output is pulsed once per trigger. One trigger input is used as a trigger. The
delay from trigger to pulse, the pulse duration and the brightness can be set.
Switched:
In switched mode a trigger input can be used to switch the output current on and off. The
sense of the trigger signal can be active high or active low.
The set up is non-volatile, so the VTR1 will resume the same operation after a power cycle.
7.1.1 Pulse and Duty Cycle Limits
In both pulsed and switched modes, the pulse width and duty cycle are internally limited to
prevent damage to the light.
The brightness can be set up to 100%, but only for short periods and at low duty cycles, so that
the lighting does not overheat and get damaged. In pulse mode, the duty cycle is limited by
ignoring triggers which are too soon after the previous trigger.
Output
Brightness
Allowed Pulse
Width for 850nm
and 940nm lights
Allowed Duty
Cycle for 850nm
and 940nm lights
Allowed Pulse
Width for white
and 740nm lights
Allowed Duty
Cycle for white
and 740nm lights
0 to 20% 3ms 6% 3ms 3%
21 to 30% 3ms 6% 2ms 3%
31% to 50% 3ms 3% 2ms 2%
51% to 100% 1ms 2% 1ms 1%
So for example, if the brightness is set to 40%, then a VTR1-850 will not allow pulses greater
than 3ms long. With 1ms pulses, if a trigger occurs within 33ms of a previous trigger (so that the
duty cycle would be greater than 3%) the trigger is ignored.
If necessary the VTR1 will limit the duty cycle by increasing the retrigger delay.
When the VTR1 internal temperature gets too high, the allowed duty cycle is reduced and
event 149 is generated. This typically happens at 60oC.
Indice
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