Communications Specialties Fiberlink 5012 User manual

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Communications Specialties’ Fiberlink® 5012 User’s Manual
Fiberlink®
5012
Universal Data Transceiver
The Fiberlink® 5012 Universal Data
Transceiver digitally transmits
RS-232/422/485 data over
multimode or single mode ber at
850 or 1310 nm. It transmits and
receives all standard data-related
signals in accordance with EIA
specications. The 5012 is suitable
for simplex, full duplex and
drop-and-repeat operation,
making it ideal for Data
Acquisition, Intelligent
Transportation, Industrial and
Manufacturing applications.

Page 2 Fiberlink® 5012 User’s Manual
Fiberlink® 5012
Contents
Welcome ........................................................................3
Features. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Package Contents ...............................................................3
Quick Installation ................................................................4
Technical Specications
Model Part Number Specications ............................................5
Operation Theory ...............................................................6
Installation Instructions ..........................................................7
Signal and Power Connections ...................................................8
DIP Switch Settings .............................................................10
Conguring a ring or loop data bus .............................................17
Operating Pointers .............................................................17
Troubleshooting ...............................................................19
Maintenance and Repairs .......................................................20
Warranty .......................................................................21
Accessories and Related Products ...............................................22
Contents

Page 3Fiberlink® 5012 User’s Manual
Fiberlink® 5012
Welcome
Thank you for purchasing Communications Specialties, Inc.’s Fiberlink® 5012. The 5012
transmits and receives all standard data-related signals in accordance with EIA
specications. The 5012 is suitable for simplex, full duplex and drop-and-repeat operation,
making it ideal for Data Acquisition, Intelligent Transportation, Industrial and
Manufacturing applications.
Features
• Transmits and receives all standard data-related signals in accordance with EIA
specications
• May be easily user-congured for the desired protocol, including mixed protocols
• Transmitter and receiver may be congured dierently
• Adjustment free; all digital processing and transmission
• Wide operating data rate, with low-speed mode (DC up to 2.1 mbps; 200 Kbps for
RS-232) and high-speed mode (10 Kbps - 10 mbps)
• Extended ambient operating range
• Data-derived or RTS transmit/receive switching (RS-485)
• Indicator LEDS monitor signal and power
• Card version lls one slot in 6000A card cage
• RoHS Compliant
Package Contents
• One Fiberlink® 5012
• This User’s Manual
Welcome | Features | Package Contents

Page 4 Fiberlink® 5012 User’s Manual
Fiberlink® 5012
Quick Installation Guide
The following is a quick installation guide for the 5012 model. It is intended for users familiar
with the installation of ber optic transmission systems to get “up and running” in minimal
time. Since these units are capable of being congured for operation in many dierent
modes, we strongly suggested that you consult the appropriate sections of this manual.
Optical
Connectors
For protocol and
mode selection see
User'sManual for
proper DIP switch
settings
Power
Connector
Signal
Connector
Signal Indicator
LEDs
Power Indicator
LED
5012
Quick Installation

Page 5Fiberlink® 5012 User’s Manual
Fiberlink® 5012
Technical Specications
Technical Specications
Model Part Number Specication
System Protocols* EIA RS-232, RS-422, RS-485, 2-wire or 4-wire
System Data Rate* Low speed: RS-232, DC-200 kbps,
RS-422/485, DC to 2.1 mbps
High speed: RS-422/485, 10 kbps to 10 mbps
Modes of Operation* Simplex, duplex, drop-and-repeat,
Asynchronous, RTS or
Data Derived T/R control
Operating Wavelength 850 nm or 1310 nm
Optical Connectors ST (MM) or FCPC (SM)
Operating Temperature -35 to +75 degrees C
Wavelength Loss Budget (dB) Distance (km) Loss Budget (dB) Distance (km)
Low Speed Low Speed High Speed High Speed
850 MM 0-12 0-4 0-6 0-2
1310 MM 0-14 0-14 0-8 0-8
1310 SM 0-15 0-35 0-8 0-20
* Note that as provided from the factory, the universal data transceiver is set to the RS-232 point-to-point
(200 kbps) and low speed modes of operation. In the low speed mode the unit will operate with all duty
cycles including DC (logic 0 or logic 1 continuously). In the high speed mode of operation, the system will
operate properly with all duty cycles from 50-50% to 70-30%.
General Information
The Universal Data Transceiver is fully compatible with EIA standards for RS-232, RS-422 and
RS-485 at data rates from 0 (DC) to 2.1 mbps (200 kbps for RS-232) in the low speed mode
or from 10 kbps to 10 mbps in the high speed mode. It may be used for simplex or full
duplex asynchronous transmissions in both point-to-point systems and drop-and-repeat
data networks. It may also be used as a protocol converter. Although there are no operating
controls, the user must congure the unit for the protocol, speed and mode of operation
desired.
The universal data transceiver comes in two versions, the 5012 stand-alone model and the
5018A card-cage model. The two models are fully compatible with each other.

Page 6 Fiberlink® 5012 User’s Manual
Fiberlink® 5012 Operation Theory
Theory of Operation
The transmitting section of the universal data transceiver converts an incoming RS-232,
RS-422 or RS-485 signals into pulses of light at the transmitting LED located in the “Transmit
(or Tx)” optical connector on the unit. These pulses of light equate to ON for a positive input
level and OFF for a negative or zero input level.
The receiving section of the universal data transceiver produces a user selectable RS-232,
RS-422 or RS-485 compatible output from the received light at the photodiode located in
the “Receive (or Rx)” optical connector on the unit. Due to the fact that all internal logic
signals are converted to either light-on or light-o, any protocol may be used in conjunc-
tion with any other protocol, thereby allowing the transceiver to be used as a data
converter as well as a general data transceiver. In addition, provision is incorporated to
allow drop and repeat operation with any protocol.
During normal operation, the RTS line (terminal block position 6) is not used. In external
RTS operation (for RS-485), terminal block position 6 is used as an enable input to toggle
the unit between transmit and receive. In this mode a positive input switches the unit to
the transmit mode while a zero input switches the unit to the receive mode. As an alter-
native, the unit may be automatically switched from transmit to receive by means of an
internal data-driven timer (Data-Derived T/R switching).
1
2
3
6
LED Driver
Current/Voltage
Converter
Transmit
LED
Receive
Photodiode
UNIVERSAL DATA TRANSCEIVER BLOCK DIAGRAM
Protocol Converter
4
5
Signal
Terminal Block

Page 7Fiberlink® 5012 User’s Manual
Fiberlink® 5012
Installation instructions
There are no operating controls on the universal data transceiver. Simply set the mode of
operation with the internal DIP switches and then connect the signal, power supply and
ber optic cables between the two units.
1. Connect the data processing equipment to be used to the 6 position terminal block
on the 5012 . Refer to the signal and power connections section on page 6 for specics.
Be certain that the various connections are made properly. Also be sure to only use
the positions called out for any particular protocol.
2. Set the internal DIP switches for the protocol, speed and mode of operation accord-
ing to the instructions beginning on page 8. Note: As provided from the factory, the
unit is set for RS-232, point-to-point.
3. Connect operating power ( +10 to +18 VDC ). Refer to Figure 1 for DC power
connections.
4. Connect the 5012 units together with two conductor ber optic cable. Be certain
that the “Transmit” connector of one unit is connected to the “Receive” connector of
the other unit.
5. The system should now be operational.
Installation
9-24 Volts
AC or DC
( - ) Negative
(+) Positive
The transmitting element in the Fiberlink® 5012 transmitter
unit contains a solid state Laser Diode located in the optical
connector. This device emits invisible infrared electromagnetic
radiation which can be harmful to human eyes. The radiation
from this optical connector, if viewed at close range with no
ber optic cable connected to the optical connector, may be
sucient intensity to cause instantaneous damage to the
retina of the eye. Direct viewing of this radiation should be
avoided at all times!
Figure 1:
5012 Power Connector
DC Input Polarity

Page 8 Fiberlink® 5012 User’s Manual
Fiberlink® 5012
Signal and Power Connections
The power terminal block connections for the model 5012 are as follows: +10 to +18 VDC,
position 2. DC return, position 1. Note that this input is also reverse-polarity protected.
RS-232 Signal Connections:
Description EIA Designation Terminal Positions
Chassis Ground/Common (AA) 1
Transmit Data (BA) (input) 2
Receive Data (BB) (output) 4
Signal Common (AB) 1
All other terminal block positions should not be connected for this format.
RS-422 Signal Connections:
Chassis Ground 1
Transmit Data (+) (input) 2
Transmit Data (-) (input) 3
Receive Data (+) (output) 4
Receive Data (-) (output) 5
All other terminal block positions should not be connected for this format.
The transmitting element in the “-7” single mode version of the universal data
transceiver uses a solid state Laser Diode located in the “Transmit” or “Tx”
optical connector on the unit. This device emits invisible infrared electro-
magnetic radiation which, if viewed at close range without a ber optic cable
connected to the optical connector, may be of sucient intensity to cause
instantaneous damage to the retina of the eye. As a result, direct viewing of
this radiation should be avoided at all times.
Signal and Power Connections

Page 9Fiberlink® 5012 User’s Manual
Fiberlink® 5012
RS-485 2-Wire Signal Connections:
Chassis Ground 1
Transmit/Receive Data (+) (input/output) 2
Transmit/Receive Data (-) (input/output) 3
RTS Enable (when used) (input) 6
All other terminal block positions should not be connected for this format.
RS-485 4-Wire Signal Connections:
Chassis Ground 1
Transmit Data (+) (input) 2
Transmit Data (-) (input) 3
Receive Data (+) (output) 4
Receive Data (-) (output) 5
RTS Enable (when used) (input) 6
All other terminal block positions should not be connected for this format.
When the RTS mode of operation is used, the input to terminal 6 must be “high” for the unit to transmit data
and “low” to receive data.
Modes of Operation:
On the 5012 stand-alone model of the universal data transceiver, there are two internal DIP
switches which are accessible on the bottom of the housing. These must be set to congure
the desired mode of operation.
Signal and Power Connections

Page 10 Fiberlink® 5012 User’s Manual
Fiberlink® 5012 DIP Switch Settings
Setting the MODE DIP switch
Switch setting example
For all protocols, positions 1 and 2 of the MODE DIP switch should be set as follows:
· Low speed mode (DC to 2.1 mbps):
Position 1 = ON, Position 2 = OFF
· High speed mode (10 kbps to 10 mbps):
Position 1 = OFF, Position 2 = ON
For RS-232, the data rate is limited to 200 kbps. For RS-422/485, the data rate is as above.
The universal data transceiver will not operate properly if positions 1 and 2 are both set to either ON or OFF.
12345678
O P E N
12345678
O P E N
12345678
O P E N
Switch ON
Switch O

Page 11Fiberlink® 5012 User’s Manual
Fiberlink® 5012
Use the following protocol-specic settings to nish conguring the MODE DIP switch
on your universal data transceiver.
RS-232 Point-to-Point (Factory-Default Setting)
123456
O P E N
All O
12345678
O P E N
See speeds
on pg 10
Mode T/R
RS-232 Drop-and-Repeat
123456
O P E N
All O
12345678
O P E N
See speeds
on pg 10
Mode T/R
When using this mode of operation, any RS-232 driver not transmitting data must be in the low or - voltage
state as per EIA RS-232D.
RS-422 Point-to-Point
123456
O P E N
All O
12345678
O P E N
See speeds
on pg 10
Mode T/R
No end-of-line terminating resistors are provided. If required, they must be connected externally.
DIP Switch Settings

Page 12 Fiberlink® 5012 User’s Manual
Fiberlink® 5012
RS-422 Drop-and-Repeat
123456
O P E N
All O
12345678
O P E N
See speeds
on pg 10
Mode T/R
No end-of-line terminating resistors are provided. If required, they must be connected externally. When
using this mode, any RS-422 driver not transmitting data must be in the “low” state (terminal block position
2, negative with respect to position 3).
RS-485 2-Wire Point-to-Point RTS Enable
123456
O P E N
All O
12345678
O P E N
See speeds
on pg 10
Mode T/R
In this mode, the input to terminal 6 must be “high” for the unit to transmit data and “low” to receive data.
No end-of-line terminating resistors are provided. If required, they must be connected externally.
RS-485 2-Wire Drop-and-Repeat RTS Enable
123456
O P E N
All O
12345678
O P E N
See speeds
on pg 10
Mode T/R
In this mode, the input to terminal 6 must be “high” for the unit to transmit data and “low” to receive data.
No end-of-line terminating resistors are provided. If required, they must be connected externally.
DIP Switch Settings

Page 13Fiberlink® 5012 User’s Manual
Fiberlink® 5012
RS-485 2-Wire Point-to-Point Data Derived T/R
123456
O P E N
See baud rate
settings on pg 15
12345678
O P E N
See speeds
on pg 10
Mode T/R
After transmitting the last data bit, the above settings will determine how long the transceiver continues
to wait in the transmit mode for data before reverting to the receive state. The times specied are only
recommendations but will be correct for most applications. If desired, they can be varied to meet specic
data requirements. No end-of-line terminating resistors are provided. If required, they must be connected
externally.
RS-485 2-Wire Drop-and-Repeat Data Derived T/R
123456
O P E N
See baud rate
settings on pg 15
12345678
O P E N
See speeds
on pg 10
Mode T/R
After transmitting the last data bit, the above settings will determine how long the transceiver continues
to wait in the transmit mode for data before reverting to the receive state. The times specied are only
recommendations but will be correct for most applications. If desired, they can be varied to meet specic
data requirements. No end-of-line terminating resistors are provided. If required, they must be connected
externally.
RS-485 4-Wire Point-to-Point RTS Enable
123456
O P E N
All O
12345678
O P E N
See speeds
on pg 10
Mode T/R
In this mode, the input to terminal 6 must be “high” for the unit to transmit data and “low” to receive data.
No end-of-line terminating resistors are provided. If required, they must be connected externally.
DIP Switch Settings

Page 14 Fiberlink® 5012 User’s Manual
Fiberlink® 5012
RS-485 4-Wire Drop-and-Repeat RTS Enable
123456
O P E N
All O
12345678
O P E N
See speeds
on pg 10
Mode T/R
In this mode, the input to terminal 6 must be “high” for the unit to transmit data and “low” to receive data.
No end-of-line terminating resistors are provided. If required, they must be connected externally.
RS-485 4-Wire Point-to-Point Data-Derived T/R
123456
O P E N
See baud rate
settings on pg 15
12345678
O P E N
See speeds
on pg 10
Mode T/R
After transmitting the last data bit, the above settings will determine how long the transceiver continues
to wait in the transmit mode for data before reverting to the receive state. The times specied are only
recommendations but will be correct for most applications. If desired, they can be varied to meet specic
data requirements. No end-of-line terminating resistors are provided. If required, they must be connected
externally.
RS-485 4-wire Drop-and-Repeat Data-Derived T/R
123456
O P E N
See baud rate
settings on pg 15
12345678
O P E N
See speeds
on pg 10
Mode T/R
After transmitting the last data bit, the above settings will determine how long the transceiver continues
to wait in the transmit mode for data before reverting to the receive state. The times specied are only
recommendations but will be correct for most applications. If desired, they can be varied to meet specic
data requirements. No end-of-line terminating resistors are provided. If required, they must be connected
externally.
DIP Switch Settings

Page 15Fiberlink® 5012 User’s Manual
Fiberlink® 5012 DIP Switch Settings
Baud Rate Settings (T/R Time 6 position switch)
Baud Rate T/R Time 1 2 3 4 5 6
2400 4.73 ms O O O O O On
4800 2.20 ms O O O O On O
9600 1.10 ms O O O On O O
19.2K 620 us O O On O O O
38.4K 300 us O On O O O O
57.6K 180 us On O O O O O
76.8K 150 us On O On On O O
115.2K 110 us On On On O O O
123456
O P E N
2400
123456
O P E N
19.2k
123456
O P E N
76.8k
123456
O P E N
4800
123456
O P E N
38.4k
123456
O P E N
115.2k
123456
O P E N
9600
123456
O P E N
57.6k

Page 16 Fiberlink® 5012 User’s Manual
Fiberlink® 5012
Optical Fiber
Versions of the universal data transceiver are available to drive most multimode (MM) and
single-mode (SM) optical bers. The specic models are identied by a sux at the end of
the model numbers as follows:
Fiber Size Connector 850nm 1310nm
50µ, 62.5µ MM ST -1 -3
8/10µ SM FCPC N/A -7
A 6300 adapter is available to allow the -1 and -3 versions of the 5012 model to be used
with multimode ber and SMA connectors. A 6310 adapter is available to allow
the -7 versions of these models to be used with single-mode ber and single-mode
ST connectors.
Indicator LEDs
The 5012 model has three green signal indicator LEDs that continuously monitor operation.
One, labeled “Power (or PWR)”, lights when operating power is present. The other two,
labeled “Transmit (or Tx)” and “Receive (or Rx)”, turn on whenever the transmitted or
received data is in the “high” state and o when it is in the “low” state. As a result, they
actually blink at the rate of the operating data. However, most data rates are so fast that
these LEDs will usually appear to be on continuously.
Optical Fiber

Page 17Fiberlink® 5012 User’s Manual
Fiberlink® 5012
Conguring a ring or loop-type data bus
In addition to point-to-point transmissions, the universal data transceiver can be used to
implement a ring or loop-type data bus. This is accomplished by setting the internal DIP
switches as shown in the following diagram.
When the universal data transceiver is used in this mode, any location can receive or insert
data into the ring/loop but only one station at a time is permitted to insert data. All other
stations will receive the data but must maintain their individual input lines in the low state
(RS-232, terminal block position 2 negative with respect to position 1; RS-422, terminal
block position 2, negative with respect to position 3) to prevent loop lock-up. RS-485
operation does not have the above restriction due to the fact that it is in the tri-state mode
when not transmitting.
Note that the rst (or host) location is set to the point-to-point mode. All other locations are
set to the drop-and-repeat mode. This is to prevent loop lock-up or data “echos”.
Conguring a ring or loop data bus
Fiber Optic Cable
Data
Fiber Optic
Transceiver
To Host Computer
Set to point-to-point
mode of operation
Set to drop-and-repeat
mode of operation
Ring or Loop-type Data Bus Conguration
Set to drop-and-repeat
mode of operation
Set to drop-and-repeat
mode of operation
Drop 3 Drop 2 Drop 1
Fiber Optic
Transceiver
Fiber Optic
Transceiver
Fiber Optic
Transceiver

Page 18 Fiberlink® 5012 User’s Manual
Fiberlink® 5012
Operating considerations for ber optic cable
The universal data transceiver may be supplied with ST or FCPC type optical connectors
and will operate with most common ber optic cables. However, it is important to use the
correct type of ber optic cable as required by your particular transceiver model. Some
models (ending in -1 and -3) are designed for use at 850 nm, while others (ending in -7)
function at 1310 nm.
When using any type of ber optic cable, be careful not to cause excessive strains, especial-
ly at the cable-to-connector junctions. Also, do not subject the cable to sharp bends or pull
it around sharp corners. Whenever possible, service loops or extra slack should be provided
in any installation. While excessive precautions are not necessary, ber optic cable should
be treated with moderate care as it does contain thin, fragile strands of glass.
Notes Regarding Fiber Optic Cable
Multimode ber optic cable contains an optical ber with a light carrying “core” that is only
.0025 inches (62.5µ) diameter. Single-mode ber optic cable has an even smaller “core”, only
00032 to .0004 inches (8-10µ). This is smaller than a human hair! Any minute particle of dirt
or dust can easily block this ber from accepting or radiating light. As a result, the key word
is cleanliness. Always use the dust caps provided with all optical connectors whenever they
are exposed to air. Also, it is a good idea to gently clean the tip of an optical connector with
alcohol whenever dust is suspected.
Mechanical butt splices or optical feedthroughs must be installed properly. Multimode
devices will not operate properly with single-mode devices even though they may look the
same. Using the wrong device can easily add more attenuation than specied, resulting in
impaired performance.
Operating Pointers
Remember to check attenuation of the ber optic cable. The system will only operate
properly if these specications fall within the range of the system’s loss budget.
Considerations | Operating Pointers

Page 19Fiberlink® 5012 User’s Manual
Fiberlink® 5012
Troubleshooting
If your system is not operating properly, the following checklist may help to diagnose the
problem:
A. Check Transmitter or Transmit Section of a Transceiver
1. Is operating power (DC, AC, Voltages) correct?
2. Are you using the correct pins on the connector or terminal block?
3. Is the correct signal level present at transmitter input?
4. Is the optical connector on the transmitting LED clear of any
obstruction or minute dirt particles?
5. Is there a short circuit anywhere in the system due to common
power ground, signal ground and case?
B. Check Optical Connectors
1. Are the connectors the correct size for the ber?
2. Are the ends of the connectors free of all dust or dirt? If not, gently
clean the tip of the connector with a clean cloth or gauze moistened
with alcohol.
3. Is the ber broken in the connector? A quick inspection with an
inexpensive jeweler’s loop can determine this.
4. Is the ber protruding from the tip of the connector? If so,
renishing will be necessary.
C. Check Fiber Optic Cable
1. Is the ber optic cable pulled too tightly around a sharp corner?
2. Is the correct ber size being used with the correct transmitter/
receiver combination?
3. Does the ber pass light at all? A small penlight or ashlight can
usually be used for this test.
4. Does the ber have too much attenuation for the system? The
attenuation measured on the installed cable will always be dierent
than when the cable was still on the reel.
5. When using lengths shorter than 10 meters (30 feet), overloading of
the receiver may occur. The shorter the length of the ber, the
greater the possibility for this condition. Be sure there is adequate
attenuation in any system. For very short distances, contact the
factory for assistance.
D. Check Receiver or Receiving Section of a Transceiver
Follow the same steps as for checking the Transmitter.
Troubleshooting

Page 20 Fiberlink® 5012 User’s Manual
Fiberlink® 5012
Maintenance and Repairs
The Fiberlink® 5012 Series has been manufactured using the latest semiconductor devices
and techniques that electronic technology has to oer. They have been designed for long,
reliable and trouble-free service and are not normally eld repairable.
Should diculty be encountered, Communications Specialties maintains a complete
service facility to render accurate, timely and reliable service of all products.
The only maintenance that can be provided by the user is to ascertain that optical
connectors are free of dust or dirt that could interfere with light transmission and that
electrical connections are secure and accurate. Please see the Troubleshooting section of
this manual for additional information.
An optical power meter, such as the Fiberlink® 6615, a visible light source, such as the
Fiberlink® 6610, and a Three Wavelength Light Source, such as the Fiberlink® 6620, can
greatly assist and expedite troubleshooting of ber optic transmission systems and are
recommended tools all installers should have available.
All other questions or comments should be directed to our Customer Service Department.
It should be noted that many “problems” can easily be solved by a simple telephone call.
If you suspect your problem is caused by the optics or the ber optic cable, and you have
an optical power meter, please take the appropriate measurements prior to contacting
support.
Maintenance and Repairs | Certications
Certications