with Allegiant Series of Switcher/Control Systems,
Divar Series of Digital Video Recorders, and System4
Series of Multiplexers
The Bosch Fiber Optic Series are transmission products
that provide efficient, high quality video and data
transmission via fiber optic cable. Fiber optic signals are
immune to ground loops, radio frequency interference
(RFI), electromagnetic interference (EMI), and cross talk
because the video carrier is infrared light and is
transmitted through a nonconductive fiber optic cable.
Interference-free operation ensures reliable service. Unlike
microwave, wire, and coaxial cable transmission systems,
fiber optic transmission is difficult, if not impossible to
tap. And, since fiber optic cable is nonconductive and
does not radiate a signal, it is difficult to detect and
locate. These compact devices are available in a surface
mount enclosure or in a modular style package that can be
rack-mounted using an optional EIA 48 cm (19 in.)
compatible rack unit.
Model Summary
Model No.Description/Use
LTC 4641, LTC 4642 SeriesSingle-channel Video Transmissions
LTC 4744, LTC 4745 Series4-Channel Video Transmissions
LTC 4628, LTC 4629 SeriesVideo/Bi-Phase Data Transmissions
LTC 4651 SeriesRS-232/ Bi-Phase Data Transmissions
LTC 4637 SeriesCard Cage Enclosure for Rack-mount
Models
Functions
Compatibility
Bosch ProductBosch Fiber Optics Series
AutoDome with VG4-SFIBER-MMLTC 4629 Series
Unity Pack Series KBE-xxxx-xxFLTC 4642 Series
IntuiKey Series KeyboardsLTC 4671 Series
LTC 5136 ControllerLTC 4651 Series
Certifications and Approvals
Electromagnetic
Compatibility (EMC)
Product SafetyComplies with CE regulations, UL, CSA,
Laser Diode ModelsComply with FDA performance Standard
Complies with FCC Part 15, ICES-003
and CE regulations
EN and IEC Standards
for Laser Products, Title 21; Code of Federal Regulations Subchapter J
www.boschsecurity.com
Page 2
2 | LTC 4600 and 4700 Series Fiber Optics
Installation/Configuration Notes
LTC 4641 and LTC 4642 Series
The LTC 4641 Series Transmitters and LTC 4642 Series
Receivers are designed for transmission of CCTV analog
video signals. Efficient installation is assured because
there are no user adjustments required. The wide
bandwidth transmission capability of these units enables
clear, sharp black and white or color pictures to be
transmitted over long distances. The compact
transmitters are small enough to be connected directly to
a camera’s BNC connector, thereby simplifying
installation.
LTC 4641 and LTC 4642 Series video transmission
1 Camera
2 Bosch KBE-xxxx-xxF pre-packaged camera
3 Coax Cable
4 Fiber Optic Video Transmitter
5 Fiber Optic Cable: Up to 4 km (2.5 miles) using 62.5/125 micron
6 Fiber Optic Video Receiver
LTC 4641 and LTC 4642 Series
Models No.DescriptionPower
Source
LTC 4641/60Mini Video Trans-
mitter
LTC 4641/50Mini Video Trans-
mitter
LTC 4642/60Video
Receiver
LTC 4642/50Video
Receiver
LTC 4642/00Video
Receiver, Rack
120 VAC,
50/60 Hz
230 VAC,
50/60 Hz
120 VAC,
50/60 Hz
230 VAC,
50/60 Hz
LTC 4637
Rack
2
Requires
LTC 4642 Series
Receiver
LTC 4642 Series Re-
ceiver
LTC 4641 Series
Transmitter
LTC 4641 Series
Transmitter
LTC 4641 Series
Transmitter
Module
2 Appropriate external power pack supplied with surface-mount models or power provided
by
LTC 4637 rack unit for rack-mount models.
Specifications
Power Requirements Transmitter
(surface-mount versions only)
Power Requirements Receiver (sur-
9–12 VDC @ 150 mA;
10–14 VAC @ 200 mA
12 VDC @ 150 mA
face-mount versions only)
Number of FibersOne (1)
Optical Budget14 dB
Maximum Distance4 km (2.5 miles)
Wavelength850 nm
Optical EmitterLED
Transmitter Output Power25 uW (–16 dBm)
Technology TypeAM modulation, with AGC
Rack Slots Required when used with
LTC 4637 Rack
One (1),
(rack-mount version only)
Video Bandwidth5 Hz to 10 MHz
Differential Gain< 5%
Differential Phase< 5°
Tilt< 1%
Signal-to-Noise Ratio (SNR)> 55 dB @ 10 dB attenuation
> 60 dB @ 7 dB attenuation
Shipping Weight< 0.9 kg (2 lb)
MTBF> 100,000 hours
Dimensions
Transmitter (L x W x H)
(surface-mount version)
Receiver (L x W x H)
(surface-mount version)
6.4 x 4.1 x 2.5 cm
(2.5 x 1.6 x 1.0 in.)
10.7 x 8.9 x 2.5 cm
(4.2 x 3.5 x 1.0 in.)
Page 3
LTC 4600 and 4700 Series Fiber Optics | 3
LTC 4744 and LTC 4745 Series
The LTC 4744 Transmitter and LTC 4745 Receiver are
designed for the transmission of up to 4 CCTV analog
video signals using one multimode fiber cable. This link
operates in the 1310 nm range and incorporates 8-bit
video encoding exceeding the requirements of EIA
RS-250C for Medium Haul video transmissions. Integral
LED status indicators provide an indication of operating
parameters.
LTC 4744 and LTC 4745 Series – 4 channel video
transmission
Rack
2
Requires
LTC 4744 Series
Transmitter
Models No.Description
LTC 4745/004-ch. Video
Receiver
Power Source
LTC 4637
Rack Module
2 Appropriate external power packs supplied with surface-mount models or power provided
by
LTC4637 rack unit for rack-mount models.
Specifications
Power Requirements Transmitter
+12 VDC @ 500 mA
and Receiver (surface-mount
versions only)
Number of FibersOne (1)
Optical Budget17 dB
Maximum Distance3 km (1.9 miles)
Wavelength1310 nm
Optical EmitterLaser diode
Technology Type8-Bit digital video encoding
Rack Slots Required when used
Two (2), rack-mount version only
with LTC 4637 Rack
Video Bandwidth10 Hz to 6.5 MHz
Differential Gain< 2%
Differential Phase< 0.7°
Tilt< 1%
Signal-to-Noise Ratio (SNR)60 dB @ maximum optical loss budget
Shipping Weight< 0.9 kg (2 lb)
MTBF> 100,000 hours
1 Camera
2 Coax Cable
3 Fiber Optic Video Transmitter
4 Fiber Optic Cable: Up to 3 km (1.9 miles) using 62.5/125 micron Mul-
timode Fiber Optic Cable
5 Fiber Optic Video Receiver
6 Video Quad Unit
LTC 4744 and LTC 4745 Series
Rack
2
Requires
LTC 4745 Series
Receiver
LTC 4745 Series
Receiver
LTC 4745 Series
Receiver
Models No.Description
LTC 4744/604-ch. Video
Transmitter
LTC 4744/504-ch. Video
Transmitter
LTC 4744/004-ch. Video
Transmitter
Power Source
120 VAC,
50/60 Hz
230 VAC,
50/60 Hz
LTC 4637
Rack Module
LTC 4745/604-ch. Video
Receiver
LTC 4745/504-ch. Video
Receiver
120 VAC,
50/60 Hz
230 VAC,
50/60 Hz
LTC 4744 Series
Transmitter
LTC 4744 Series
Transmitter
Dimensions
Transmitter (L x W x H)
(surface-mount versions)
Receiver (L x W x H)
(surface-mount versions)
17.8 x 12.5 x 2.5 cm
(7.0 x 4.9 x 1.0 in.)
17.8 x 12.5 x 5.0 cm
(7.0 x 4.9 x 2.0 in.)
LTC 4628 and LTC 4629 Series
The LTC 4628 and LTC 4629 are a bidirectional
transmission system designed to implement a complete
CCTV system using a single optical fiber cable. This
system independently transmits an analog video signal
from the camera location to the controller location, while
simultaneously transmitting Bosch Bi-Phase control code
from the controller location to the camera location. The
video channel is compatible with monochrome or color
cameras. The data channel is compatible with control
systems that utilize Bosch Bi-Phase, simplex RS-232, or
RS-422 signals. Both units incorporate LED indicators to
provide quick visual indication of the module
performance.
www.boschsecurity.com
Page 4
4 | LTC 4600 and 4700 Series Fiber Optics
LTC 4628 and LTC 4629 Series – video/data transmission
1 AutoDome Series Pan/Tilt/Zoom Camera
2 Bi-Phase Control Data Cable
3 Fiber Optic Transceiver
4 Fiber Optic Cable: Up to 4 km (2.5 miles) using 62.5/125 micron Mul-
timode Fiber Optic Cable
5 Allegiant Series Switcher/Controller, Divar Digital Video Recorder, or
System4 Series Multiplexer
6 IntuiKey Series Keyboard
7 Bi-Phase Control Data Cable
8 Video
LTC 4628 and LTC 4629 Series
Models No.DescriptionPower
Source
LTC 4628/60Video/Data
Transceiver
LTC 4628/50Video/Data
Transceiver
LTC 4628/00Video/Data
120 VAC,
50/60 Hz
230 VAC,
50/60 Hz
LTC 4637 RackLTC 4629 Series
Transceiver
2
Requires
LTC 4629 Series
Transceiver
LTC 4629 Series
Transceiver
Transceiver
Rack Module
LTC 4629/60Data/Video
Transceiver
LTC 4629/50Data/Video
Transceiver
LTC 4629/00Data/Video
Transceiver
120 VAC,
50/60 Hz
230 VAC,
50/60 Hz
LTC 4637
Rack
LTC 4628 Series
Transceiver
LTC 4628 Series
Transceiver
LTC 4628 Series
Transceiver
Rack Module
2 Appropriate external power pack supplied with surface-mount models or power provided
by LTC 4637 rack unit for rack-mount models.
Specifications
Power Requirements LTC 4628 (surfacemount versions only)
Power Requirements LTC 4629 (surface-
24 VAC C.T. ,
11–14 VDC @ 200 mA
12 VDC @ 200 mA
mount versions only)
Number of FibersOne (1)
Optical Budget14 dB
Maximum Distance4.0 km (2.5 miles)
Technology TypeAM Video modulation
Wavelength850 nm / 1310 nm
Optical EmitterLED
Transmitter Output Power25 uW (–16 dBm)
Rack Slots Required (when used with
LTC 4637 Rack)
One (1), rack-mount version
only
Video Bandwidth5 Hz to 10 MHz
Differential Gain< 5%
Differential Phase< 5°
Tilt< 1%
Signal-to-Noise Ratio (SNR)> 55 dB @ 10 dB
attenuation
> 60 dB @ 7 dB
attenuation
Data RateDC to 100 kbps (NRZ)
Shipping Weight< 0.9 kg (2 lb)
MTBF> 100,000 hours
Dimensions
L x W x H (surface-mount versions)17.8 x 12.5 x 2.5 cm
(7.0 x 4.9 x 1.0 in.)
LTC 4671 Series
The LTC 4671 Series are Transceivers designed especially
for the transmission of RS-485 signals used by system
keyboards in the Allegiant Series of switcher/controller
systems, the Divar Series of digital video recorders, and
the System4 Series of multiplexers. The unit contains
both a transmitter and a receiver operating in the 850 nm
range to allow bidirectional communication using two
fibers between the main control site and its remote
keyboard.
Page 5
1 2
3
4 5
6
7 8
9
0
Shot
Mon
Prod
Clr
BOSCH
LTC 4671 Series – keyboard data transmission
1 Allegiant Series Switcher/Controller, Divar Digital Video Recorder, or
System4 Series Multiplexer
2 Separate Video Signal Transmission Link
3 Fiber Optic Data Transceiver
4 Up to 4 km (2.5 miles) using 62.5/125 micron Multimode Fiber Optic
Cables
5 Keyboard Data
6 IntuiKey Series Keyboard
LTC 4671 Series
LTC 4600 and 4700 Series Fiber Optics | 5
Specifications
Shipping Weight< 0.9 kg (2 lb)
MTBF> 100,000 hours
Dimensions
L x W x H (surface-mount versions)17.8 x 12.5 x 2.5 cm
(7.0 x 4.9 x 1.0 in.)
LTC 4651 Series
The LTC 4651 Transceivers are designed especially for the
transmission of Bosch Bi-Phase control code signals used
in the Allegiant Series of switcher/controllers, various
DVRs, multiplexers, and other camera control systems.
They are also compatible with Manchester code and
standard RS-232 signals. These units operate in the
850 nm range and contain a removable screw terminal
type connector that allows easy connection to the
shielded twisted pair cable carrying the control signal.
These units can also be used as an RS-232C transceiver
that is compatible with EIA Standard RS-232C levels. The
system is suitable for simplex asynchronous data
transmissions using one fiber, or full duplex asynchronous
data transmissions using two fibers up to 64 kbaud.
Models No.DescriptionPower
Source
LTC 4671/60RS-485
Transceiver
LTC 4671/50RS-485
Transceiver
LTC 4671/00RS-485
Transceiver
120 VAC,
50/60 Hz
230 VAC,
50/60 Hz
LTC 4637
Rack
2
Requires
LTC 4671 Series
Transceiver
LTC 4671 Series
Transceiver
LTC 4671 Series
Transceiver
Rack Module
2 Appropriate external power pack supplied with surface-mount models or power provided
by LTC 4637 rack unit for rack-mount models.
Specifications
Power Requirements (surface-mount ver-
12 VDC @ 200 mA
sions only)
Number of FibersTwo (2)
Optical Budget14 dB
Maximum Distance4.0 km (2.5 miles)
Wavelength850 nm
Optical EmitterLED
Transmitter Output Power25 uW (–16 dBm)
Rack Slots Required (when used with
LTC 4637 Rack)
One (1), rack-mount version
only
Data RateDC to 150 kbps
LTC 4651 Series – RS232 data transmission
1AutoDome Series Pan/Tilt/Zoom Camera
2Separate Video Signal Transmission Link
3Bi-Phase Control Data Cable
4Fiber Optic Data transceiver
5Up to 3.5 km (2 miles) using 62.5/125 micron Multimode Fiber Op-
tic Cable
6Controller Junction Box
7Bi-Phase Control Data Cable
8Data
9Controller
www.boschsecurity.com
Page 6
6 | LTC 4600 and 4700 Series Fiber Optics
LTC 4637/60
power supply
Power
BOS CH
LT C 4637
LTC 4651 Series
Models No.DescriptionPower
Source
LTC 4651/60Bi-Phase/RS-232
Transceiver
LTC 4651/50Bi-Phase/RS-232
Transceiver
LTC 4651/00Bi-Phase/RS-232
Transceiver, Rack
120 VAC,
50/60 Hz
230 VAC,
50/60 Hz
LTC 4637
Rack
Requires
2
LTC 4651 Series Transceiver
LTC 4651 Series Transceiver
LTC 4651 Series Transceiver
Module
2 Appropriate external power pack supplied with surface-mount models or power provided
by LTC 4637 rack unit for rack-mount models.
Specifications
Power Requirements (surface-mount ver-
12 VDC @ 150 mA
sions only)
Number of FibersOne (1) for Bi-Phase and
simplex RS-232 transmissions;
Two (2) for duplex RS-232
transmissions
Optical Budget14 dB
Maximum Distance3.5 km (2 miles)
Wavelength850 nm
Optical EmitterLED
Transmitter Output Power25 uW (–16 dBm)
Rack Slots Required (when used with
LTC 4637 Rack)
One (1), rack-mount version
only
Data RateDC to 1.5 Mbps (NRZ)
Shipping Weight< 0.9 kg (2 lb)
MTBF> 100,000 hours
Dimensions
L x W x H (surface-mount versions)10.7 x 8.9 x 2.5 cm
(4.2 x 3.5 x 1.0 in.)
LTC 4637 Series Rack
The LTC 4637 Series Rack Units provide the option to
rack-mount LTC 4600 Series Fiber Optic Modules in a
standard EIA 48 cm (19 in.) rack. The unit incorporates an
integral power supply that supplies power to all modules
installed in the rack-mount unit. The supply also utilizes a
standard IEC AC power connector for easy power cord
replacement or exchange with various worldwide
AC power plug configurations. Modules installed in the
rack-mount unit can be hot-swapped, so it is not
necessary to power down the rack when removing or
replacing modules. The integral power supply
incorporates an automatic electronic current limiting
feature for each individual rack-mount slot. This design
eliminates the possibility of a single-point failure causing a
complete shut down of the entire rack. The current
limiting function is also self-resetting, should the fault or
overload be of a temporary or intermittent nature.
LTC 4637 Series Rack
Models No.Input
Voltage
LTC 4637/60120 VAC,
Voltage Range Output
Max Power
Voltage
108 to 13220 VAC80 W
50/60 Hz
LTC 4637/50230 VAC,
198 to 26420 VAC80 W
50/60 Hz
3 Maximum power dissipation (fully loaded).
Specifications
ConstructionModular style aluminum enclosure, with
detachable IEC type AC power connector
Number of Slots14
IndicatorsPower supply pilot lamp
Power Supplied to Modules20 VAC, Center tapped @ 4.0 A
FusingOne (1) slow-blow for rack power supply;
modules individually electronically fused
ConnectorsAC line cord; 3-terminal adaptor sockets,
per slot
Shipping Weight< 2.15 kg (< 5 lb)
Dimensions
L x W x H48.3 x 17.8 x 13.3 cm
(19.0 x 7.0 x 5.25 in.)
3
Page 7
LTC 4600 and 4700 Series Fiber Optics | 7
Technical Specifications
Common Specifications
NOTE: Specifications noted below apply to all models unless otherwise specified in applica-
ble model section.
Optical Connector TypeST (most modules)
Optical Fiber
Compatibility
50/125 µm or 62.5/125 µm, graded index multimode glass fiber rated for a minimum bandwidth of 600 MHz-Km. For
50/125 fiber, subtract 4 dB from the
specified optical budget value.
Optical Distance
Specifications
Specified transmission distances are limited to the optical loss of the fiber and any
additional loss introduced by connectors,
splices, and patch panels. The modules
are designed to operate over the entire
optical loss budget range, so they do not
require a minimum loss in order to operate.
Data and Power
Removable screw terminal blocks
Connections
ConstructionSurface-mountable metal enclosure de-
signed to maximize
EMI/RFI shielding
Environmental
Operating Temperature–40°C to 74°C (–40°F to 165°F)
Storage Temperature–40°C to 85°C (–40°F to 185°F)
Humidity0% to 95% relative, non-condensing
Accessories
LTC 4600/00 blank panel (1 rack slot). Used to cover unused slots in
LTC 4637 Series racks.
Replacement Power Supply Part Numbers
UPA-1509-60For 120 VAC, 50/60 Hz models
UPA-1509-50For 230 VAC, 50/60 Hz models
Ordering Information
LTC 4600/00 Blank Panel
LTC 4600/00
to cover one slot of the LTC 4637 48-cm (19in.) rack
LTC 4628/00 Video/Data Transceiver,
LTC 4628/00
Rack Module
850 nm FOM, receives data, use with
LTC 4637 series rack
LTC 4628/50 Video/Data Transceiver
LTC 4628/50
850 nm FOM, 230 VAC, 50 Hz
LTC 4628/60 Video/Data Transceiver
LTC 4628/60
850 nm FOM, 120 VAC, 60 Hz
LTC 4629/00 Data/Video Transceiver,
LTC 4629/00
Rack Module
850 nm FOM, use with LTC 4637 series rack
LTC 4629/50 Data/Video Transceiver
LTC 4629/50
850 nm FOM, 230 VAC, 50 Hz
Ordering Information
LTC 4629/60 Data/Video Transceiver
850 nm FOM, 120 VAC, 60 Hz
LTC 4637/50 Rack and Power Supply
for FOM, 48 cm (19 in.), 230 VAC, 50 Hz
LTC 4637/60 Rack and Power Supply
for FOM, 48 cm (19 in.), 110 VAC, 60 Hz
LTC 4641/50 Mini Video Transmitter
Video fiber transmitter, 850 nm, 230 VAC,
50 Hz
LTC 4641/60 Mini Video Transmitter
850 nm FOM, video signals, 120 VAC, 60 Hz
LTC 4642/00 Video Receiver, Rack Module
850 nm FOM, video signals, use with
LTC 4637 series rack