Fiber Optic Transmitters and
Receivers for SERCOS, PROFIBUS
and INTERBUS-S Applications
HFBR-1505A/2505A
(SMA Tx/Rx for SERCOS)
HFBR-1515B/2515B
(ST
Tx/Rx for PROFIBUS)
HFBR-1505C/2505C
(SMA Tx/Rx for INTERBUS-S)
Technical Data
Features
Meets Industrial SERCOS,
PROFIBUS, and INTERBUS-S
Standard
SMA and ST
Ports
650 nm Wavelength
Technology
Specified for Use with 1 mm
Plastic Optical Fiber and 200
m Hard Clad Silica
Auto-Insertable and Wave
Solderable
DC 10 MBd Data Rate
Applications
Industrial Control Data
Links
Factory Automation Data
Links
Voltage Isolation
Applications
PLCs
Motor Drives
Sensor, Meter and Actuator
Interfaces
Description
SERCOS
SERCOS, an acronym for SErial
Realtime COmmunications
System, is a standard digital
interface for communication in
industrial CNC applications.
SERCOS is a European
(EN 61491) and international
standard (IEC 61491). The
optical interface allows data rates
of 2, 4, 8, and 16 MBd and data
transfer between numerical
controls and drives via fiber-optic
rings, with voltage isolation and
noise immunity. The HFBR-
1505A and HFBR-2505A
products comply with SERCOS
specifications for optical
characteristics and connector
style, and have guaranteed
performance up to 10 MBd.
(Typically the 16 MBd required
by SERCOS is possible as well
but please contact Agilent
regarding the plan for the
16 MBd device.)
PROFIBUS
PROFIBUS, an acronym of
PROcess FIeld BUS, is an open
fieldbus standard defined for data
rates ranging from 9.6 kBd to
12 MBd in selectable steps for
wire and optical fiber. PROFIBUS
is a German national DIN 19245
standard and a European
CENELEC standard EN 50170.
The ST
connector is the
recommended optical port of the
PROFIBUS optical fiber version
but other connectors are allowed
as well. The HFBR-1515B and
HFBR-2515B comply fully to the
technical guideline using Plastic
Optical Fiber up to 6 MBd, and
have a guaranteed performance at
data rates up to 10 MBd.
(Typically the 12 MBd is possible
as well, but please contact Agilent
regarding the plan for the 12 MBd
device.)
INTERBUS-S
INTERBUS-S, a special open
Sensor/Actuator Bus, is finding a
broad acceptance in the factory
automation industry. The HFBR-
1505C and HFBR-2505C were
specially designed for this
application and can be used with
1 mm POF and 200
m HCS fiber
at the specified data rates of
500 kBd and 2 MBd. The optical
transmission guideline is a
supplement of the German
National DIN E 19258 standard
draft. On the European level,
ST
is a registered trademark of AT&T.
HCS
is a registered trademark of
SpecTran Corporation.
2
Specified Link Performance
0C to +70C unless otherwise noted.
Parameter
Symbol
Min.
Max.
Unit
Condition
Reference
Link Distance with
1
0.1
40
m
POF
Notes 1,2,3,4,6
HFBR-1505A/2505A or
0.1
200
m
HCS
Notes 1,2,3,5,6
HFBR-1515B/2515B
Link Distance with
1
0.1
50
m
POF
Notes 1,2,3,4,7
HFBR-1505C/2505C
0.1
400
m
HCS
Notes 1,2,3,5,7
Pulse Width Distortion
PWD
30
+30
ns
25% to 75%
Note 1
with HFBR-1505A/2505A
duty cycle
or HFBR-1515B/2515B
Pulse Width Distortion
PWD
125
+125
ns
arbitrary duty cycle
Note 1
with HFBR-1505C/2505C
prEN 50254 is the draft of the
INTERBUS-S fieldbus.
Package Information
All HFBR-X5X5X series
transmitters and receivers are
housed in a low-cost, dual-in-line
package that is made of high
strength, heat resistant,
chemically resistant and UL 94
V-O (UL file # E121562) flame
retardant plastic. The
transmitters are easily identified
by the light grey colored
connector port. The receivers are
easily identified by the dark grey
colored connector port. The
package is designed for auto-
insertion and wave soldering so it
is ideal for high volume
production applications.
Handling and Design
Information
When soldering, it is advisable to
leave the protective cap on the
unit to keep the optics clean.
Good system performance
requires clean port optics and
cable ferrules to avoid
obstructing the optical path.
Clean compressed air often is
sufficient to remove particles of
dirt; methanol on a cotton swab
also works well.
Recommended Chemicals for
Cleaning/Degreasing X5X5X
Products
Alcohols:
methyl, isopropyl, isobutyl.
Aliphatics:
hexane, heptane.
Other:
soap solution, naphtha.
Do not use partially halogenated
hydrocarbons such as
1,1,1 trichloroethane, ketones
such as MEK, acetone,
chloroform, ethyl acetate,
methylene dichloride, phenol,
methylene chloride or
N-methylpyrolldone. Also, Agilent
does not recommend the use of
cleaners that use halogenated
hydrocarbons because of their
potential environmental harm.
CAUTION: The small junction size inherent in the design of these components increases the
components' susceptibility to damage from electrostatic discharge (ESD). It is advised that
normal static precautions be taken in handling and assembly of these components to prevent
damage and/or degradation which may be induced by ESD.
Notes:
1. With recommended Tx and Rx circuits (60 mA nominal drive current).
2. POF HFBR-Exxyyy 0.23 dB/m worst case attentuation.
3. HCS
10 dB/km worst case attenuation.
4. Including a 3 dB optical safety margin accounting for link service lifetime.
5. Including a 2 dB optical safety margin accounting for link service lifetime.
6. Signaling rate DC to 10 MBd.
7. Signaling rate DC to 2 MBd.
3
Absolute Maximum Ratings
Parameter
Symbol
Min.
Max.
Unit
Reference
Storage and Operating Temperature
T
S,O
40
85
C
Peak Forward Input Current
I
F,PK
90
mA
Note 6
Average Forward Input Current
I
F,AVG
60
mA
Reverse Input Voltage
V
R
3
V
Lead Soldering Cycle
Temp
T
SOL
260
C
Note 7
Time
10
s
HFBR-15X5X
Transmitters
The HFBR-15X5X transmitter
incorporates a 650 nm LED in a
light gray nonconductive plastic
housing. The high light output
power enables the use of both
PIN
FUNCTION
1
4
5
6
7
8
CONNECTED TO PIN 4
CONNECTED TO PIN 1
GND
GND
CATHODE
ANODE
Electrical/Optical Characteristics
0C to +70C unless otherwise noted.
Parameter
Symbol
Min.
Typ.
[1]
Max.
Unit
Condition
Ref.
Optical Power
P
T
/
T
0.02
dB/C
Temperature
Coefficient
Forward Voltage
V
F
1.8
2.1
2.65
V
I
F, dc
= 60 mA
Fig. 1
Forward Voltage
V
F
/
T
1.8
mV/C
Fig. 1
Temperature
Coefficient
Breakdown Voltage
V
BR
3.0
13
V
I
F, dc
= 10
A
Peak Emission
PK
640
650
660
nm
Fig. 3
Wavelength
Full Width Half Max
FWHM
21
30
nm
Fig. 3
Diode Capacitance
C
O
60
pF
V
F
= 0 V, f = 1 MHz
Thermal Resistance
JC
140
C/W
Notes 4,5
Rise Time (10% to 90%)
t
r
13
ns
10% to 90%,
Fall Time (90% to 10%)
t
f
10
ns
I
F
= 60 mA
plastic optical fiber (POF) and
Hard Clad Silica (HCS
). This
transmitter can be operated up to
10 MBd using a simple driver
circuit. The HFBR-1505X is
compatible with SMA connectors,
while the HFBR-1515X mates
with ST
connectors.
5
6
7
8
4
1
BOTTOM VIEW,
HFBR-15x5x
SEE NOTE 10
EYE SAFETY: The HFBR-15x5x is a Class 1 LED Product and eye safe when used within the data
sheet limits and under normal operating conditions. This includes all reasonably foreseeable
single fault conditions per IEC60825-1 and amendments.
4
Peak Output Power
0C to +70C unless otherwise noted.
Model Number
Symbol
Min.
Max.
Unit
Condition
Reference
HFBR-1505A
P
T
10.5
5.5
dBm
POF, I
F, dc
= 35 mA
Notes 2,3,11
SERCOS
7.5
3.5
POF, I
F, dc
= 60 mA
Figure 2
18.0
10
HCS
, I
F, dc
= 60 mA
HFBR-1515B
10.5
5.5
POF, I
F, dc
= 35 mA
Notes 2,3,11
PROFIBUS
7.5
3.5
POF, I
F, dc
= 60 mA
Figure 2
18.0
8.5
HCS
, I
F, dc
= 60 mA
HFBR-1505C
6.2
0.0
POF, I
F, dc
= 60 mA
Notes 3,8,9
INTERBUS-S
16.9
8.5
HCS
, I
F, dc
= 60 mA
Figure 2
Notes:
1. Typical data at 25C.
2. Optical power measured at the end of 0.5 meters of 1 mm diameter plastic optical fiber with a large area detector.
3. Minimum and maximum values for P
T
over temperature are based on a fixed drive current. The recommended drive circuit has
temperature compensation which reduces the variation in P
T
over temperature, refer to Figures 4 and 6.
4. Thermal resistance is measured with the transmitter coupled to a connector assembly and fiber, and mounted on a printed circuit
board.
5. To further reduce the thermal resistance, the cathode trace should be made as large as is consistent with good RF circuit design.
6. For I
F,PK
> 60 mA, the duty factor must maintain I
F,AVG
60 mA and pulse width
1
s.
7. 1.6 mm below seating plane.
8. Minimum peak output power at 25C is 5.3 dBm (POF) and 16.0 dBm (HCS
) for 1505C series only.
9. Optical power measured at the end of 1 meter of 1 mm diameter plastic or 200
m hard clad silica optical fiber with a large area
detector.
10. Pins 1 and 4 are for mounting and retaining purposes, but are electrically connected; pins 5 and 6 are electrically isolated. It is
recommended that pins 1, 4, 5, and 6 all be connected to ground to reduce coupling of electrical noise.
11. Output power with 200
m hard clad silica optical fiber assumes a typical 10.5 dB difference compared to 1 mm plastic optical
fiber.
Figure 1. Typical Forward Voltage vs.
Drive Current.
Figure 2. Typical Normalized Optical
Power vs. Drive Current.
Figure 3. Typical Normalized Optical
Spectra.
2.5
1
10
100
IF,DO TRANSMITTER DRIVE CURRENT mA
V
F
FORWARD VOLTAGE V
2.3
2.1
1.9
1.7
1.5
-40 C
0 C
25 C
70 C
85 C
10
1
10
100
IF,DO TRANSMITTER DRIVE CURRENT mA
P
T
NORMALIZED OUTPUT POWER dB
0
-10
-20
-30
-40
-40 C
25 C
85 C
1.4
610
650
690
WAVELENGTH nm
NORMALIZED SPECTRAL OUTPUT POWER
1.2
0.8
0.4
0.2
0
-40 C
0 C
630
670
0.6
1.0
25 C
70 C
85 C
5
Figure 4. Typical Normalized Optical
Power vs. Temperature (in
Recommended Drive Circuit).
Figure 5. Typical Optical Pulse Width
Distortion vs. Temperature and
Power Supply Voltage (in
Recommended Drive Circuit).
1.2
-40
-20
0
20
40
60
80
TEMPERATURE C
NORMALIZED OUTPUT POWER
1.1
1.0
0.9
0.8
0.7
VCC = 5.0 V
VCC = 5.25 V
VCC = 4.75 V
2
-40
-20
0
20
40
60
80
TEMPERATURE C
PWD ns
1
-1
-2
-4
-5
VCC = 5.0 V
VCC = 4.75 V
-3
0
VCC = 5.25 V
Recommended Drive Circuit for HFBR-x505A/x515B
Figure 6. Recommended Transmitter and Receiver Drive Circuit (I
F, on
= 35 mA or 60 mA Nominal at T
A
= 25C).
8
7
6
5
1
4
U2
HFBR-15X5
5
6
7
8
4
1
U3
HFBR-25X5
R2
2.7
C4
0.1 F
+5 V VCC
0 V
TTL OUTPUT
8
2
1
3
4
+5 V VCC
0 V
TTL INPUT
R1
C1
10 F
C2
0.1 F
U1
DS75451
TTL COMPATIBLE TRANSMITTER
TTL COMPATIBLE RECEIVER
R1
IF
82.5
35 mA
47
60 mA
+
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