TKH Siqura VBS 2020 TX User manual

VBS 2020 TX and VBS 2050 TX
Stand-alone optical video transmitters
USER MANUAL
1. General Description
An optical video baseband transmitter VBS 2020 or
2050 TX converts an electrical composite video
signal into an optical, intensity modulated
equivalent, using AM techniques. The VBS 2020
TX uses an optical wavelength of 850 nm and
needs a multimode optical fiber connection,
whereas the VBS 2050 TX transmits at 1300 nm
and works with single-mode or multimode fiber. In
the latter case, at least 10 dB link attenuation is
required.
VBS 2020 TX and 2050 TX stand-alone trans-
mitters are designed for use in combination with
TKH Security optical receiver modules from the
VBS 2000 series –that is, the VBS 2010/2020 and
VBS 2040/2050 single and triple receivers,
respectively.
The units may be powered with TKH Security's
PSA 12 DC power supply; for applications in harsh
environments, a PSU 12 DC is recommended.
Other technical specifications are listed in section 4.
2. Indicators and connectors
Figure 1 shows the signal connection facilities and
the indicator on the signal I/O side of a VBS stand-
alone transmitter. The green LED (2) signals
POWER ON. The optical output has an ST
connector (1), while a 75 BNC connector (3) is
used for input.
The other side of the unit carries a DC power
connector (4, see figure 2). The negative terminal is
tied to the housing.
3. Installation and maintenance
In some cases, the unit can be fitted inside a camera
housing. Use the correct power supply voltage (see
section 4, Technical Specifications).
To maintain reliable operation of the module,
observe the following:
- Prevent dust from collecting on the unit
- Protect the module against moisture.
If the output from an optical connection fed by this
module is too low, check the optical link first.
Safety and EMC information is found in the final
section of this document.
2
1
3
Figure 2.
Stand-alone transmitter VBS 2020 or 2050 TX, with
DC power connector. Note that the negative
terminal is tied to the housing
Figure 1.
Stand-alone transmitter VBS 2020 or 2050 TX,
perspective view. See section 2 for explanation.
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© Siqura 2017
Version 002701-2f
VBS2020&2050TX (MW10)

2
4. Technical specifications
VBS 2020 TX
VBS 2050 TX
Optical
Wavelength
850
1300
nm
Source
LED
LED
Fiber type
62.5, 50
62.5(1), 50(1), 9
m
Output level
-18
-28(2)
dBm
System link budget(3)
16
12(2)
dB
Video (with corresponding VBS RX)
Video system
PAL/SECAM/NTSC
Bandwidth (-3 dB)
10
MHz
Differential gain
<5
%
Differential phase
<5
o
Input impedance
75

Input level
1 (±3 dB)
Vpp
Electrical
Power supply voltage
12 ± 1
Vdc
Power consumption
0.5
0.75
W
Environmental
Ambient temperature
Full performance
+5 to +45
oC
Operation
-40 to +74
oC
Relative humidity
<95 (no condensation)
%
Electrical safety
AL / IEC / EN 60950-1
UL recognition file
E242498
Laser safety
IEC 60825-1, IEC 60825-2
EMC immunity
EN 55024, EN 50130-4,
EN 61000-6-2
EMC emission
EN 55022 (Class B)
FCC 47 CFR 15 (Class B)
Mechanical
Outer dimensions
33 x 60 x 90
mm
Weight
0.140
kg
Optical connector
ST
Video connector
BNC
Power connector
Combicon (2-pin)
1Certain restrictions apply, see section 1
2 Into 9 m fiber
3With matching VBS receivers
Table 1. Technical specifications of stand-alone
optical transmitters VBS 2020 TX and 2050 TX
5. Safety, EMC, ESD
General
The safety information contained in this section, and on
other pages of this manual, must be observed whenever this
unit is operated, serviced, or repaired. Failure to comply with
any precaution, warning, or instruction noted in the manual
is in violation of the standards of design, manufacture, and
intended use of the unit.
Installation, adjustment, maintenance and repair of this
equipment are to be performed by trained personnel aware of
the hazards involved. For correct and safe use of the
equipment and in order to keep the equipment in a safe
condition, it is essential that both operating and servicing
personnel follow standard safety procedures in addition to the
safety precautions and warnings specified in this manual, and
that this unit be installed in locations accessible to trained
service personnel only.
Siqura assumes no liability for the customer’s failure to
comply with any of these safety requirements.
UL/IEC/EN 60950-1: General safety requirements
The equipment described in this manual has been
designed and tested according to the UL/IEC/EN 60950-1
safety requirements.
If there is any doubt regarding the safety of the equipment, do
not put it into operation. This might be the case when the
equipment shows physical damage or is stressed beyond
tolerable limits (e.g. during storage and transportation).
Before opening the equipment, disconnect it from all power
sources. The equipment must be powered by a SELV*) power
supply.
When this unit is operated in extremely elevated temperature
conditions, it is possible for internal and external metal
surfaces to become extremely hot.
Optical safety
This optical equipment contains Class 1M lasers or LEDs
and has been designed and tested to meet IEC 60825-
1:1993+A1+A2 and IEC 60825-2:2004 safety class 1M
requirements.
Optical equipment presents potential hazards to testing and
servicing personnel owing to high levels of optical radiation.
When using magnifying optical instruments, avoid looking
directly into the output of an operating transmitter or into the
end of a fiber connected to an operating transmitter, or there
will be a risk of permanent eye damage.Precautions should
be taken to prevent exposure to optical radiation when the
unit is removed from its enclosure or when the fiber is
disconnected from the unit. The optical radiation is invisible
to the eye.
Use of controls or adjustments or procedures other than
those specified herein may result in hazardous radiation
exposure.
The installer is responsible for ensuring that the label
depicted below (background: yellow; border and text: black)
is present in the restricted locations where this equipment is
installed.
The locations of all optical connections are listed in the
Indications and Connectors section of this manual.
Optical outputs and wavelengths are listed in the Technical
Specifications section of this manual.
Hazard Level 1M

3
EMC
Warning: Operation of this equipment in a residential
environment could cause radio interference.
This device has been tested and found to meet the CE
regulations relating to EMC and complies with the limits
for a Class A device, pursuant to Part 15 of the FCC rules.
Operation is subject to the following two conditions: (1) This
device may not cause harmful interference, and (2) This
device must accept any interference received, including
interference that may cause undesired operation. These limits
are designed to provide reasonable protection against
interference to radio communications in any installation. The
equipment generates, uses, and can radiate radio frequency
energy; improper use or special circumstances may cause
interference to other equipment or a performance decrease
due to interference radiated by other equipment. In such
cases, the user will have to take appropriate measures to
reduce such interactions between this and other equipment.
Note that the warning above does not apply to TKH Security
products which comply with the limits for a Class B device.
For product-specific details, refer to the EU Declaration of
Conformity.
Any interruption of the shielding inside or outside the
equipment could make the equipment more prone to fail EMC
requirements.
To ensure EMC compliance of the equipment, use shielded
cables for all signal cables including Ethernet, such as
CAT5E SF/UTP or better, as defined in ISO IEC 11801. For
power cables, unshielded three wire cable (2p + PE) is
acceptable Ensure that all electrically connected components
are carefully earthed and protected against surges (high
voltage transients caused by switching or lightning).
ESD
Electrostatic discharge (ESD) can damage or destroy
electronic components. Proper precautions should be
taken against ESD when opening the equipment.
*) SELV: conforming to IEC 60950-1, <60 Vdc output, output
voltage galvanically isolated from mains. All power supplies or
power supply cabinets available from Siqura comply with these
SELV requirements.
6. Product disposal
Recycling The unit contains valuable materials which
qualify for recycling. In the interest of
protecting the natural environment, properly
recycling the unit at the end of its service life
is imperative.
7. EU Declaration of Conformity
The EU Declaration of Conformity for this product is
available at http://www.tkhsecurity.com/support-files
Accessory:
- 2-pin Combicon connector