OT Systems FT120DB Series User manual

All Digital Fiber Optic Manufacturing Specialists
Installation and Operation Manual
FT120DB Series
10-bit Digital Series
1-ch Video with 2 Bi-directional Data
Fiber Optic Converter
OT Systems Ltd., 2009
Rev 1.1

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Models covered in this manual
Standalone Units
Single-Mode Transmitters
FT120DB-SSTSA
FT120DB-SSTLSA
Single-Mode Receivers
FT120DB-SSRSA
FT120DB-SSRLSA
Multi-Mode Transmitter
FT120DB-SMTSA
Multi-Mode Receiver
FT120DB-SMRSA
Card Modules
Single-Mode Transmitters
FT120DB-SST
FT120DB-SSTL
Single-Mode Receivers
FT120DB-SSR
FT120DB-SSRL
Multi-Mode Transmitter
FT120DB-SMT
Multi-Mode Receiver
FT120DB-SMR
Remark:
If the optical connector is FC type, the suffix in the model number will be “-FXX”. Eg.
FT120DB-FST

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Table of Contents
(1) SAFETY INSTRUCTIONS.......................................................................................3
(2) PRODUCT OVERVIEW ..........................................................................................4
2.1 Introduction.......................................................................................................4
2.2 Models selection table ......................................................................................5
(3) INSTALLATION .......................................................................................................6
3.1 General.............................................................................................................6
3.2 Standalone unit installation...............................................................................6
3.3 Card module installation ...................................................................................7
(4) CABLE CONNECTIONS & SETUP PROCEDURES...............................................7
4.1 System cable connections ................................................................................7
4.2 Data port assignment and pin connections.......................................................9
4.3 Dip switch setting procedures.........................................................................10
4.4 Ground connection .........................................................................................12
(5) OPERATIONAL GUIDES ......................................................................................13
5.1 FT120DB Series Transmitter ..........................................................................13
5.2 FT120DB Series Receiver ..............................................................................13
(6) SPECIFICATIONS.................................................................................................14
(7) DRAWINGS...........................................................................................................15
(8) WARRANTY INFORMATION ................................................................................15
(9) CONTACT INFORMATION ...................................................................................15

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(1) Safety Instructions
Please be familiar with all information in this manual prior to installation and
operation.
Note 1: The products described each contains a Class 1 laser or LED fiber optic emitter. The
following safety precautions apply.
Warning: Do not disconnect the fiber optic connector while the unit is powered up.
Exposure to Class I invisible optical radiation is possible when the internal fiber optic
connector is disconnected while the unit is powered up.
Caution: Any access to the controls, adjustments, or performing operations, which are
other than those facilitated and/or specified may result in hazardous radiation exposure.
Permanent eye damage or other bodily injuries may be resulted from such exposure even
for only seconds.
Note 2: This assembly contains parts sensitive to damage by electrostatic discharge (ESD). ESD
precautionary procedures should be applied in the course of touching, removing or inserting parts
or assemblies.

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(2) Product Overview
2.1 Introduction
The FT120DB Series products comprise of either single-mode or multi-mode fiber optic
transmitters and receivers catering for optical transmission of ONE forward (Tx →Rx) video and
TWO bi-directional (Tx ↔Rx) data signals in one fiber. The products work at wavelengths
1310nm and 1550nm with either a 9/125um or 62.5/125um fiber for single-mode or multi-mode
transmission respectively.
A non-compressed 10-bit digital video transmission scheme is implemented which supports
multi-systems video in NTSC, PAL and SECAM formats. Transparent data transmission is also
accomplished in RS232, RS422 and RS485 formats regardless of the types of communication
protocol implemented within the system. Time Division Multiplex (TDM) technique is employed for
digital transmission of forward video and data; whereas optical Wavelength Division Multiplex
(WDM) technique is employed for simultaneous reverse data transmission so as bi-directional
data transmission is accomplished.
For the single-mode transmission, we also offer specifically designed products for long-haul
transmissions up to 60km. Their model names include a letter “L” in the suffix, e.g.
FT120DB-SSTLfor Tx, FT120DB-SSRLfor Rx, etc.
The FT120DB Series units are available as standalone units, which can be mounted
horizontally or vertically wall-mounted on any fixtures. The standalone unit comes with an
external power adaptor FT-PA/12V, which can be powered by a local residential power supply
outlet.
The FT120DB Series units are also available as plug-in cards installed in 19” rack-mount
chassis deployed in small, medium to large systems. Each plug-in card occupies two slot space
inside the rack-mount chassis. The rack mount chassis has to be ordered separately which is
integrated with a power supply unit for powering the installed card modules.

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2.2 Models selection table
Type
Mode
Models
1
Descriptions Installation
requirements
Remarks
Standalone Units
SIngle-Mode
FT120DB-SSTSA
Single-mode 1-Ch. Video Transmitter &
2-Ch. Data Transceiver Standalone Unit
Horizontally or
vertically
wall-mounted
Standalone
unit
FT-PA/12V
external
power
adaptor is
included for
the
Standalone
unit
2
FT120DB-SSTLSA
Single-mode Long-haul 1-Ch. Video
Transmitter & 2-Ch. Data Transceiver
Standalone Unit
FT120DB-SSRSA
Single-mode 1-Ch. Video Receiver &
2-Ch. Data Transceiver Standalone Unit
FT120DB-SSRLSA
Single-mode Long-haul 1-Ch. Video
Receiver & 2-Ch. Data Transceiver
Standalone Unit
Multi-Mode
FT120DB-SMTSA
Multi-mode 1-Ch. Video Transmitter &
2-Ch. Data Transceiver Standalone Unit
FT120DB-SMRSA
Multi-mode 1-Ch. Video Receiver &
2-Ch. Data Transceiver Standalone Unit
Card Modules
Single-Mode
FT120DB-SST
Single-mode 1-Ch. Video Transmitter &
2-Ch. Data Transceiver Card Module
Housed in
FT-C18
chassis
3
FT-C18
chassis has
to be
ordered
separately
FT120DB-SSTL
Single-mode Long-haul 1-Ch. Video
Transmitter & 2-Ch. Data Transceiver
Card Module
FT120DB-SSR
Single-mode 1-Ch. Video Receiver &
2-Ch. Data Transceiver Card Module
FT120DB-SSRL
Single-mode Long-haul 1-Ch. Video
Receiver & 2-Ch. Data Transceiver
Card Module
Multi-Mode
FT120DB-SMT
Multi-mode 1-Ch. Video Transmitter &
2-Ch. Data Transceiver Card Module
FT120DB-SMR
Multi-mode 1-Ch. Video Receiver &
2-Ch. Data Transceiver Card Module
1
If the optical connector is FC type, the suffix in the model number will be “-FXX”. Eg. FT120DB-FST
2
FT-PA/12V works under 100 -240VAC, 50/60Hz power supply
3
Refer to FT-C18 product manual for specifications

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(3) Installation
3.1 General
All OT Systems products are thoroughly inspected, tested and securely packed before
delivery to ensure a stable, intact and trouble-free service. Please check the equipment upon
receipt for any visible damage which may have been caused during transit.
The FT120DB Series standalone units (Fig. 3.1) can be either horizontally or vertically
wall-mounted, or mounted on any fixtures, etc. The Standalone unit works with an external power
adaptor FT-PA/12V powered by a local residential power supply outlet.
The FT120DB Series card modules are housed inside the FT-C18 rack-mount chassis (Fig.
3.2) with an included power supply unit. The whole chassis is powered by a local residential
power supply outlet. FT-C18 is a standard 19” (483mm) rack-mount chassis which occupies 4
rack units space (177.8mm) in height. Each FT120DB card module occupies two slot space
inside and a total of 9 cards can be housed inside the chassis.
3.2 Standalone unit installation
a) Mount the standalone unit onto a fixture, e.g. a plank, (either on the wall or on a flat surface)
with four screws piercing through the holes on the mounting frame to secure it in position.
b) The provided power adaptor should also be mounted on the same fixture or in the proximity
for connection of the supply cables to the unit, provided that an AC power supply socket is
nearby for powering the adaptor.
c) Once the unit is powered up, check that the red POWER LED on the unit is lit. If not, check
the power supply cable connections between the unit and the power supply socket.
d) Connect all the signal inputs and outputs at the back of the unit with appropriate cables:
fiber optic cable for optical link, BNC cable for video input/output (Tx/Rx), and UTP cables for
data inputs/outputs (Tx/Rx).
e) With all the signals available at the input and output ports, check the status of LEDs located
on the unit. With correct status of each LED, installation is now completed [for LEDs status, see
Operational Guides on this manual’s section (5)].
Fig. 3.1 Standalone unit Fig. 3.2 FT-C18 chassis

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3.3 Card module installation
a) Insert the card module into the FT-C18 chassis along the top and bottom card guides of two
empty slots and push the card into the multi-pin socket at the rear firmly.
b) Repeat the above procedure for all the rest card modules. Unused slots must be covered
with blank panels (provided separately).
c) Once the chassis is powered up, check that the red POWER LED on the front and back
panels of the card modules are lit. If not, check the power supply cable connections between the
chassis and the power supply socket. For failures of individual card’s POWER LEDs, check the
corresponding card modules, whether they have been inserted properly.
d) Connect all the signal inputs and outputs at the back of the unit with appropriate cables:
fiber optic cable for optical link, BNC cable for video input/output (Tx/Rx), and UTP cables for
data inputs/outputs (Tx/Rx).
e) With all the signals available at the input and output ports, check the status of LEDs located
on the unit . With correct status of each LED, installation is now completed [for LEDs status, see
Operational Guides on this manual’s section (5)].
(4) Cable Connections & Setup Procedures
4.1 System cable connections
Signal Type Cable Type Connector
Optical Single-mode or Multi-mode fiber ST (or FC) Connector
Video Coaxial Video Cable BNC Connector
Data Twisted-pair Cable Screw Terminal Block
Typical System Cable Connections Diagrams:
Standalone Transmitter Standalone Receiver
Fig 4.1 Standalone unit to Standalone unit connection diagram

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Standalone Transmitter Card Module Receiver
Fig 4.2 Standalone unit to Card Module connection diagram
Card Module Transmitter Card Module Receiver
Fig 4.3 Card Module to Card Module connection diagram

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4.2 Data port assignment and pin connections
Data ports assignment and pin connections are identical for Data1 and Data2. Data1 on Tx
communicates with Data1 on Rx and Data 2 on Tx communicates with Data2 on Rx.
For data input and output connections, please note the following pin assignment:
Pin Assignment
(Screw Terminal
Block)
Data format
1 2 3 4 5 6 7
RS422/485 (4-Wire) IN(+) IN(-) OUT(+) OUT(-)
N/A N/A N/A
RS485 (2-Wire) IN/OUT (+) IN/OUT (-)
N/A N/A N/A N/A N/A
RS232 N/A N/A N/A N/A IN OUT Sig. COM
4-Wire RS422/485 Full Duplex Data communication connection diagram:
Transmitter End Receiver End
User’s Equipment
DATA PORT
(7-PIN)
DATA PORT
(7-PIN)
User’s Equipment
TX(+) 1 IN(+) 1 IN(+) TX(+)
TX(-) 2 IN(-) 2 IN(-) TX(-)
RX(+) 3 OUT(+) 3 OUT(+) RX(+)
RX(-) 4 OUT(-) 4 OUT(-) RX(-)
5 N/A 5 N/A
6 N/A 6 N/A
7 N/A 7 N/A
Fig. 4.4.1 Connector Pin Assignments for 4-wire RS422/485 data format at Data port
2-Wire RS485 Half Duplex Data communication connection diagram:
Transmitter End Receiver End
User’s Equipment
DATA PORT
(7-PIN)
DATA PORT
(7-PIN)
User’s Equipment
TX/RX(+) 1 IN/OUT(+) 1 IN/OUT(+) TX/RX(+)
TX/RX(-) 2 IN/OUT(-) 2 IN/OUT(-) TX/RX(-)
3 N/A 3 N/A
4 N/A 4 N/A
5 N/A 5 N/A
6 N/A 6 N/A
7 N/A 7 N/A
Fig. 4.4.2 Connector Pin Assignments for 2-wire RS485 data format at Data port.

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RS232 Data communication connection diagram:
Transmitter End Receiver End
User’s Equipment
DATA PORT
(7-PIN)
DATA PORT
(7-PIN)
User’s Equipment
1 N/A 1 N/A
2 N/A 2 N/A
3 N/A 3 N/A
4 N/A 4 N/A
TX 5 IN 5 IN TX
RX 6 OUT 6 OUT RX
Sig. COM 7 Sig. COM 7 Sig. COM Sig. COM
Fig. 4.4.3 Connector Pin Assignments for RS232 data format at Data port
4.3 Dip switch setting procedures
The only setup procedure is to select the appropriate line terminations and data
transmission formats. Selections must be made by setting the dip switches (Fig. 4.5) through the
access on the front panel.
(a) Dip switches on FT120DB Series Standalone unit
(b) Dip switches on FT120DB Series Card Module
Fig. 4.5 Location of Dip Switches

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Dip switch settings for various types of data transmissions
Function / Switch No. Sw. 3 Sw. 4
RS485 (2-Wire) OFF OFF
RS422/485 (4-Wire)* OFF ON
RS232 ON OFF
* Factory setting [RS422/485 (4-Wire)]
Dip switch settings for line terminations
Line Output Termination Line Input Termination
Function / Switch No. Sw. 1
Line Output Terminated ON
Line Output Unterminated* OFF
Function / Switch No. Sw. 2
Line Input Terminated ON
Line Input Unterminated* OFF
* Factory setting (Line Output and Line Input “Unterminated”)
Industrial practice for line terminations
For RS422 4-wire communication, it is suggested to keep the input and output lines
terminated in the ONE Tx to ONE Rx configuration.
For RS485 2/4-wire communication, the RS485 devices can be disabled to stay on Hi-Z
state. It is very important that the data lines have to be terminated with a resistor being
connected across the pair wires so as to eliminate the residual standing signal waves on the
lines in the Hi-Z line condition. So, it is recommended that the lines should be terminated with the
appropriate resistance. For more than one RS485 devices are connected in a daisy-chain
configuration, only the farthest device of the loop, i.e. the device located at the end of the lines,
should be terminated; whereas the middles ones are set to “Unterminated” status. See the figure
4.6 below for reference.
(a) RS485/422 4-wires Bus structure (b) RS485 2-wire Bus structure
Fig. 4.6 Termination of different Bus structures

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4.4 Ground connection
For enhanced safety precautions to reduce the risks of human hazards and physical
damages caused by lightning and other power surges, in addition to the incorporation of the
surge protective devices into the products, a screw is provided on the Standalone cabinets (Fig.
4.7). It is highly recommended that the Standalone unit must have good ground connections
made to the system earthing terminals in accordance with the local safety practice.
Fig. 4.7 Standalone unit earth terminal location

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(5) Operational Guides
5.1 FT120DB Series Transmitter
LED Indicators
Indicator Color Description
PWR Red Lit when power is supplied to the Transmitter.
OL Yellow Lit when optical signal from receiver to transmitter is active.
VIDEO IN /
VIN Green
Lit when video signal is fed into the VIDEO IN connector.
DATA1 IN Red Blinks when input data is available at Tx.
OUT Green Blinks when output data is available at Tx.
DATA2 IN Red Blinks when input data is available at Tx.
OUT Green Blinks when output data is available at Tx.
Signal Ports
OPT - ST (or FC) Optical Connector for fiber cable connection.
VIDEO IN - BNC Video Connector for video signal input.
DATA - 7-pin Screw Terminal Blocks for data signals.
5.2 FT120DB Series Receiver
LED Indicators
Indicator Color Description
PWR Red Lit when power is supplied to the Receiver.
OL Yellow Lit when optical signal from transmitter to receiver is active.
VIDEO OUT /
VOUT Green
Lit when video signal is received at VIDEO OUT connector.
DATA1 IN Red Blinks when input data is available at Rx.
OUT Green Blinks when output data is available at Rx.
DATA2 IN Red Blinks when input data is available at Rx.
OUT Green Blinks when output data is available at Rx.
Signal Ports
OPT - ST (or FC) Optical Connector for fiber cable connection.
VIDEO OUT - BNC Video Connector for video signal output.
DATA - 7-pin Screw Terminal Blocks for data signals.

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(6) Specifications
MODELS*
PARAMETERS
FT120DB-SST(R)SA
FT120DB-SST(R)
(Single-Mode)
FT120DB-SST(R)LSA
FT120DB-SST(R)L
(Single-Mode)
FT120DB-SMT(R)SA
FT120DB-SMT(R)
(Multi-Mode)
OPTICAL
No. of Fiber / Connector 1 / ST (or FC) 1 / ST (or FC) 1 / ST (or FC)
Wavelength 1310/1550 nm 1550/1310 nm 1310/1550 nm
Optical Power Budget 17 dB 24 dB 23 dB
Max Distance 40 km 60 km 4 km
ELECTRICAL VIDEO
Channel / Connector 1 / BNC
System PAL, NTSC, SECAM
Bandwidth 6.5 MHz
Input/Output Impedance 75 Ohm
Input/Output Level 1.0 Vp-p typical
Differential Gain < 1% typical
Differential Phase < 1
o
typical
SNR >65dB
DATA
Channel / Connector 2 / 7-pin Screw Terminal
Direction Bi-directional (Duplex)
Electrical Format RS232, RS422, RS485 (2-wire, 4-wire) Tri-state
Transmission Rate 0~256Kbps
POWER
Power consumption 12VDC @ 5.4W
Power Supply Standalone Unit: FT/PA12V DC Adaptor
Card module: Powered by FT-C18 chassis
Connector (Standalone unit) 2-pin Screw Terminal
PHYSICAL
Weight Standalone unit: 0.76 kg Card module: 0.3 kg
Dimensions (W x H x D) Standalone unit: 156 x 50.5 x 223 mm (MAX)
Card module: 148 x 41 x 213 mm (MAX)
ENVIRONMENTAL
Operating Temperature -40
o
C ~ +75
o
C
Storage Temperature -40
o
C ~ +85
o
C
Relative Humidity 0 ~ 95% non-condensing
MTBF >100’000 Hours
* If the optical connector is FC type, the suffix in the model number will be “-FXX”. Eg. FT120DB-FST

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(7) Drawings
Fig. 7.1 Dimensional drawings of Standalone unit (mm)
(8) Warranty Information
All OT Systems products are subject to limited life-time warranty offered by the company in
normal circumstances. Please refer to the OT Systems Products Warranty Statement for details.
Access to the statement is available in our company website at www.ot-systems.com.
(9) Contact Information
OT Systems Ltd. (Hong Kong)
Unit 1023, 10/F Landmark North
39 Lung Sum Avenue
Sheung Shui, N.T., Hong Kong
Tel. [phone]
Fax. [phone]
[email protected]
OT Systems Ltd. (USA)
River Heights Business Park
5375 US Highway 34
Oswego, IL 60543, USA
Tel. [phone]
Fax. [phone]
[e-mail]