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PDF HFBR-0600 Data sheet ( Hoja de datos )
| Número de pieza | HFBR-0600 | |
| Descripción | SERCOS Fiber Optic Transmitters and Receiver | |
| Fabricantes | Hewlett-Packard | |
| Logotipo |  |
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SERCOS Fiber Optic
Transmitters and Receiver
Technical Data
HFBR-0600 Series
Features
• Fully Compliant to SERCOS
Optical Specifications
• Optimized for 1 mm Plastic
Optical Fiber
• Compatible with SMA
Connectors
• Auto-Insertable and Wave
Solderable
• Data Transmission at
Symbol Rates from DC to
over 2 MBd for Distances
from 0 to over 20 Metres
Applications
• Industrial Control Data
Links
• Reduction of Lightning and
Voltage Transient Suscepti-
bility
• Tempest-Secure Data
Processing Equipment
• Isolation in Test and
Measurement Instruments
• Robotics Communication
SERCOS
SERCOS is a SErial Realtime
COmmunication System, a
standard digital interface for
communication between controls
and drives for numerically
controlled machines. The SERCOS
interface specification was written
by a joint working group of the
VDW (German Machine Tool
Builders Association) and ZVEI
(German Electrical and Electronic
Manufacturer’s Association) to
allow data exchange between NC
controls and drives via fiber optic
rings, with isolation and noise
immunity. The HFBR-0600 family
of fiber optic transmitters and
receivers comply to the SERCOS
specifications for transmitter and
receiver optical characteristics
and connector style (SMA).
Description
The HFBR-0600 components are
capable of operation at symbol
rates from DC to over 2 MBd and
distances from 0 to over 20
metres. The HFBR-1602 and
HFBR-1604 transmitters contain
a 655-nm AlGaAs emitter capable
of efficiently launching optical
power into 1000 µm plastic
optical fiber. The optical output is
specified at the end of 0.5 m of
plastic optical fiber.
The HFBR-1604 is a selected
version of the HFBR-1602, with
power specified to meet the
SERCOS high attenuation
specifications.
The HFBR-2602 receiver incor-
porates an integrated photo IC
containing a photodetector and dc
amplifier driving an open-
collector Schottky output
transistor. The HFBR-2602 is
designed for direct interfacing to
popular logic families. The
absence of an internal pull-up
resistor allows the open-collector
output to be used with logic
families such as CMOS requiring
voltage excursions higher than
VCC. The HFBR-2602 has a
dynamic range of 15 dB.
CAUTION: The small junction sizes inherent to the design of this component increase the component's
susceptibility to damage from electrostatic discharge (ESD). It is advised that normal static precautions be
taken in handling and assembly of this component to prevent damage and/or degradation which may be
induced by ESD.
1 page  
5
Notes:
1. 2.0 mm from where leads enter case.
2. Typical data at TA = +25°C.
3. Thermal resistance is measured with
the transmitter coupled to a connector
assembly and fiber, and mounted on a
printed circuit board.
4. Pins 2, 6, and 7 are welded to the
cathode header connection to minimize
the thermal resistance from junction to
ambient. To further reduce the thermal
resistance, the cathode trace should be
made as large as is consistent with
good RF circuit design.
5. PT is measured with a large area
detector at the end of 0.5 metre of
plastic optical fiber with 1 mm
diameter and numerical aperture of
0.5.
6. When changing µW to dBm, the optical
power is referenced to 1 mW (1000
µW). Optical Power P(dBm) = 10 log
[P (µW)/1000 µW].
7. Measured at the end of 1mm plastic
fiber optic cable with a large area
detector.
8. 8 mA load (5 x 1.6 mA), RL = 560 Ω.
9. Propagation delay through the system
is the result of several sequentially
occurring phenomena. Consequently it
is a combination of data-rate-limiting
effects and of transmission-time
effects. Because of this, the data-rate
limit of the system must be described
in terms of time differentials between
delays imposed on falling and rising
edges. As the cable length is increased,
the propagation delays increase. Data-
rate, as limited by pulse width distor-
tion, is not affected by increasing cable
length if the optical power level at the
receiver is maintained.
10. Pulse width distortion is the difference
between the delay of the rising and
falling edges.
11. Both HFBR-1602 and HFBR-1604
meet the SERCOS "low attenuation"
specifications when operated at 35 mA;
only HFBR-1604 meets the SERCOS
"high attenuation" limits when operated
at 60 mA.
Figure 1. Forward Voltage and
Current Characteristics.
Figure 2. Typical Transmitter Output
vs. Forward Current.
Figure 3. Transmitter Spectrum
Normalized to the Peak at 25°C.
Figure 4. Typical Propagation Delay through
System with 0.5 Metre of Cable.
Figure 5. Typical HFBR-160X/2602 Link
Pulsewidth Distortion vs. Optical Power.
5 Page | ||
| Páginas | Total 6 Páginas | |
| PDF Descargar | [ Datasheet HFBR-0600.PDF ] | |
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