Optical Systems Design OSD138 User manual

OPERATOR MANUAL
OSD138
UNIVERSAL FIBER OPTIC DATA
MODEM

OPTICAL SYSTEMS DESIGN
DOC ID: 10105510
OSD138 OPERATOR MANUAL
PAGE 1
INDEX
1 TECHNICAL SUMMARY.................................................................................................... 2
1.1 PRODUCT DESCRIPTION..................................................................................................... 2
1.1.1 OVERVIEW......................................................................................................................... 2
1.1.2 APPLICATIONS.................................................................................................................. 2
1.1.3 FEATURES AND BENEFITS............................................................................................. 2
1.2 TYPICAL CONFIGURATION................................................................................................ 3
1.3 PRODUCTS AND OPTIONS .................................................................................................. 3
1.4 TECHNICAL SPECIFICATIONS ........................................................................................... 5
1.5 DATA I/O CONNECTOR PIN ASSIGNMENTS .................................................................... 6
2 INSTALLATION AND OPERATION................................................................................. 7
2.1 INTRODUCTION .................................................................................................................... 7
2.2 INSTALLATION ..................................................................................................................... 7
2.2.1 WARNING AND PRECAUTIONS..................................................................................... 7
2.2.2 OSD138 DRAWINGS AND DIMENSIONS....................................................................... 8
2.2.3 POWER SUPPLY CONNECTIONS ................................................................................... 9
2.2.4 BASIC CONNECTIONS ..................................................................................................... 9
2.3 OSD138 OPERATION........................................................................................................... 10
2.3.1 INDICATOR FUNCTIONS............................................................................................... 11
2.3.2 DATA MODE CONTROL SWITCH SETTINGS............................................................. 11
3 MAINTENANCE.................................................................................................................. 13
3.1 INTRODUCTION .................................................................................................................. 13
3.2 EXTERNAL INSPECTION ................................................................................................... 13
3.3 ROUTINE MAINTENANCE................................................................................................. 13
4 WARRANTY ........................................................................................................................ 14
4.1 WARRANTY PERIOD.......................................................................................................... 14
4.2 REPAIRS................................................................................................................................ 14
4.2.1 WARRANTY REPAIRS.................................................................................................... 14
4.2.2 OUT-OF-WARRANTY REPAIRS.................................................................................... 14
4.2.3 SITE REPAIRS .................................................................................................................. 14
4.2.4 EXCLUSIONS ................................................................................................................... 14
TABLE 1: PRODUCT OPTIONS............................................................................................................ 3
TABLE 2: TECHNICAL SPECIFICATIONS ......................................................................................... 5
TABLE 3: DATA CONNECTOR PIN ASSIGNMENTS........................................................................ 6
TABLE 4: DC POWER CONNECTION................................................................................................. 9
TABLE 5: OSD138 INDICATOR FUNCTION .................................................................................... 11
TABLE 6: DATA MODE SWITCH SETTINGS .................................................................................. 12
TABLE 7: RS485 TURNAROUND TIME SWITCH SETTINGS........................................................ 12
FIGURE 1: OSD138 TWO FIBER SYSTEM.......................................................................................... 3
FIGURE 2: OSD138 SINGLE FIBER WDM OPERATION................................................................... 3
FIGURE 3: DATA 8 -WAY TERMINAL BLOCK CONNECTOR ....................................................... 6
FIGURE 4: OSD138 MODULE AND CARD MOUNTING DIMENSIONS......................................... 8
FIGURE 5: OSD138C POWER SUPPLY CONNECTIONS .................................................................. 9
FIGURE 6: OSD138C SIDE VIEW....................................................................................................... 11
FIGURE 7: FRONT VIEW OF DATA MODE SWITCH ..................................................................... 12

OPTICAL SYSTEMS DESIGN
DOC ID: 10105510
OSD138 OPERATOR MANUAL
PAGE 2
1TECHNICAL SUMMARY
1.1 PRODUCT DESCRIPTION
1.1.1 OVERVIEW
The OSD138 is a high performance universal fiber optic modem capable of transmitting and receiving
RS422, RS232 or RS485 full duplex, asynchronous data over distances of several kilometres at the
speeds from DC to 1Mbps. The 6-way switch is used to configure the Data Mode and RS485
turnaround times.
The OSD138 is available in two physical configurations: card or module. The card versions are
designed to fit the 3RU-high 19” OSD370 chassis (or OSD350 chassis) which allows multiple OSD
card products to be conveniently powered from and located in the one chassis. The module case
versions are intended for isolated use and require an external power source.
The OSD138 operates over up to 5km of standard low cost multimode fiber optic cable and over up to
at least 50km of singlemode fiber.
The OSD138 can be used with any standard multimode optical fiber, and is available optionally for
singlemode fiber use. Wavelength Division Multiplexing (WDM) is available to allow the use of a
single fiber for transmission and reception. For 2-wire RS485 transmission, the OSD138 is also
available with Single Fiber Single Wavelength operation (SFSW) which will interoperate with the
OSD155 RS485 modem.
1.1.2 APPLICATIONS
▲ Long distance RS422, RS232 or RS485 links
▲ Links requiring a module at one end and a card at the other
▲ Secure, noise immune government and industrial communications
1.1.3 FEATURES AND BENEFITS
▲ Multi-protocol operation
▲ 2 and 4-wire RS485, TTL, RS422, Manchester, Biphase or RS232 operation
▲ Extends link lengths to 5km on multimode and over 50km on singlemode fiber
▲ Full duplex, asynchronous, DC to 1Mbps
▲ Plugs directly into the OSD370 or OSD350 standard chassis (card version)
▲ ST optical connectors standard
▲ Safe transmission in hazardous environments
▲ More secure than copper cables
▲ Robust and reliable

OPTICAL SYSTEMS DESIGN
DOC ID: 10105510
OSD138 OPERATOR MANUAL
PAGE 3
1.2 TYPICAL CONFIGURATION
FIGURE 1: OSD138 TWO FIBER SYSTEM
FIGURE 2: OSD138 SINGLE FIBER WDM OPERATION
1.3 PRODUCTS AND OPTIONS
The standard configuration options available for the OSD138 are described in Table 1.
TABLE 1: PRODUCT OPTIONS
OPTION DESCRIPTION
C Stand-alone Modem Case
L Single mode operation
WA or C.WA 1-fiber Wavelength Division Multiplexed (WDM) multimode operation with
Tx:850nm & Rx:1310nm, works in pair with WB or C.WB
WB or C.WB 1-fiber Wavelength Division Multiplexed (WDM) multimode operation with
Tx:1310nm & Rx:850nm, works in pair with WA or C.WA
L.WA or LC.WA 1-fiber Wavelength Division Multiplexed (WDM) singlemode operation with
Tx:1310nm & Rx:1550nm, works in pair with L.WB or LC.WB
L.WB or LC.WB 1-fiber Wavelength Division Multiplexed operation (WDM) singlemode
operation with Tx:1550nm & Rx:1310nm, works in pair with L.WA or
LC.WA
OSD138 OSD138
Tx
Rx Tx
Fiber Interface
Data
I/O
DATA
INPUT/
OUTPUT
Data
I/O
Rx
DATA
INPUT/
OUTPUT
OSD138.WA OSD138.WB
Tx
Rx
Fiber Interface
Data
I/O
Data
I/O
DATA
INPUT/
OUTPUT
DATA
INPUT/
OUTPUT
Tx
Rx

OPTICAL SYSTEMS DESIGN
DOC ID: 10105510
OSD138 OPERATOR MANUAL
PAGE 4
OSD138 (example only)
ITEM DESCRIPTION
- Two Fiber version
SFL Single Fiber Singlemode version
SFM Single Fiber Multimode version
ITEM DESCRIPTION
- Multimode for two-fiber version
L Singlemode for two-fiber version
ITEM DESCRIPTION
- Card version (3RU high chassis mount for OSD370or OSD350)
C Stand-alone case version (extrusion case)
ITEM DESCRIPTION
- Two optical fiber operation or SFL version or SFM version
WA Wavelength Division Multiplexed (WDM) single fiber operation with Tx @
1310nm and Rx @ 1550nm.
SFM L C WA
1 2 3 4
1
3
4
2

OPTICAL SYSTEMS DESIGN
DOC ID: 10105510
OSD138 OPERATOR MANUAL
PAGE 5
1.4 TECHNICAL SPECIFICATIONS
Table 2 below provides the technical specifications for the OSD138
TABLE 2: TECHNICAL SPECIFICATIONS
SPECIFICATION PERFORMANCE
Data rate DC to 1Mbps NRZ
Pulse Distortion and Jitter <±0.3µsec over full dynamic range
Wavelength 850nm nominal (1300nm for the OSD138L)
Coupled Transmit Power >-15 to -12dBm peak into 62.5/125 multimode fiber
>-15 to -12dBm peak into 10/125 singlemode fiber (OSD138L only)
Receiver Sensitivity <-37dBm peak for 1 x 10
-9
BER
Optical Link Budget >22dB at 850nm (>5km of multimode fiber for OSD138)
>22dB at 1300nm (>50km of singlemode fiber for OSD138L)
Receiver Saturation >-12dBm peak
Input User selectable between RS422/485 levels, TTL on the + input with - input
floating or RS232 levels
User Controls
A 6-way user settable lever switch controls:
RS422/RS232 or RS485
RS232 polarity
2-wire or 4-wire RS485
RS485 bias on/off
RS485 turnaround times
Electrical Connectors
9-pin male subminiature D connector for power on card
2-way terminal block with screw clamps for power on module
8-way terminal block with screw clamps for data
Optical Connector ST standard
Operating Temperature -20 to 75°C
Relative Humidity 0 to 95% non-condensing
Power Requirements +11
DC
to +35V
DC
or 22 to 28V
AC
at less than 1.8VA
Weight 150g (card)
280g (module)
Dimensions(mm) 210D x 25W x 100H (card)
114D x 105W x 31H (module)
10213812
NOTE:
Many combinations of laser types and optical levels, receiver types and sensitivity levels are
possible. Contact OSD for details.

OPTICAL SYSTEMS DESIGN
DOC ID: 10105510
OSD138 OPERATOR MANUAL
PAGE 6
1.5 DATA I/O CONNECTOR PIN ASSIGNMENTS
TABLE 3: DATA CONNECTOR PIN ASSIGNMENTS
8 WAY DATA
TERMINAL
BLOCK
FUNCTION
1 RS422 INPUT + / RS485 (2W I/O, 4W INPUT +)
2 RS422 INPUT - / RS485 (2W I/O, 4W INPUT -)
3 GROUND
4 RS422 OUTPUT + / RS485 (4W OUTPUT +)
5 RS422 OUTPUT - / RS485 (4W OUTPUT -)
6 RS232 TRANSMIT
7 RS232 RECEIVE
8 GROUND
FIGURE 3: DATA 8 -WAY TERMINAL BLOCK CONNECTOR
CAUTION:
The modem case is floating and should be connected to ground. Failure to do so may result in
interference on the data lines.
When connecting data cables between the OSD138 and the host equipment please ensure that both
equipment are grounded together otherwise unreliable data may occur.
RS485 2-Wire half duplex is used to connect several devices to the same bus when only one unit
transmits data at a time. All units are normally in high impedance receive mode waiting for data. When
transmission of data is requested, the device waits for a protocol specific turn-around time delay before
transmitting after which it returns to receive mode.
RS485 4-Wire full duplex is used for master/slave arrangement. Devices are polled and respond faster
with no turn-around time delay required between request/response. The receiver is always enabled
allowing the devices to receive data even while responding to a request.
Note: If a link doesn't seem to be working correctly (no communication or just one way
communication), try swapping the polarity of the data lines on both ends. Some devices are marked
opposite the RS485 standard.
12345678
8-Way Data Connector
Power Connector
12
See section 2.2.3

OPTICAL SYSTEMS DESIGN
DOC ID: 10105510
OSD138 OPERATOR MANUAL
PAGE 7
2INSTALLATION AND OPERATION
2.1 INTRODUCTION
This section outlines the methods required to install and operate the OSD138 modem
successfully. It should be studied carefully if damage to the equipment or poor results are to
be avoided.
This equipment has been fully tested prior to dispatch and is ready for immediate operation.
However, it is advisable to check for external transportation damage before operation. If
damage is present, return the unit in its original packaging to the supplier immediately.
2.2 INSTALLATION
2.2.1 WARNING AND PRECAUTIONS
▲ ELECTROMAGNETIC COMPATIBILITY
WARNING: This is a Class A product. In a domestic environment this product may cause radio
interference in which case the user may be required to take adequate measures.
▲ OPTICAL OUTPUT OPERATION
WARNING: Laser Safety: Class 1 Laser Product per IEC/EN 60825-1:20011 standard.
Class 1
The OSD138 is a Class 1 laser product.
PRECAUTIONS
▲ All service personnel should be provided training as to the hazards of direct viewing of laser
radiation and of the precautionary measures during servicing of equipment
▲ Areas where laser products are installed should be restricted in access to trained service
personnel only and appropriate warning signs posted in the work area.
▲ All laser apertures should be covered by protective covers when not connected to optical
fibers. Never leave outputs uncovered.
▲ Laser equipment should be positioned above or below eye level where possible. Apertures
should be positioned away from personnel.
▲ Protective eyewear should be worn in the vicinity of laser equipment.

OPTICAL SYSTEMS DESIGN
DOC ID: 10105510
OSD138 OPERATOR MANUAL
PAGE 8
2.2.2 OSD138 DRAWINGS AND DIMENSIONS
The OSD138 is designed to be mounted on an even surface and to be secured by means of M4 or
smaller screws. The OSD138 card versions is designed to be inserted into a chassis and secured by
means of captivated screws.
(a) Module Version
(b) Card Version
FIGURE 4: OSD138 MODULE AND CARD MOUNTING DIMENSIONS
25
100
210
R2.1
R2.1
Ø8.5
8.0
8.0
DETAIL A
6.0
25.6
104.7
6.0
25.6
DETAIL A
49.5
113.4
31.3
138.4
100.7

OPTICAL SYSTEMS DESIGN
DOC ID: 10105510
OSD138 OPERATOR MANUAL
PAGE 9
2.2.3 POWER SUPPLY CONNECTIONS
The OSD138 card version is powered from the OSD370 or OSD350 chassis. DC power on the OSD138
card version is connected via the DB9 connector. The card version of the OSD138 should be fixed into
the chassis using the captivated screws and can be plugged in or out of the chassis with power on or
off.
The OSD138 module requires external DC or AC power. The voltage range of the OSD138 is +11V
DC
to +35V
DC
or 22 to 28V
AC
with maximum current requirement of 1.8VA. Power should be connected to
the power connector located at the back of the case (see Figure 5), and as indicated in Table 4.
TABLE 4: DC POWER CONNECTION
External Power Pin Specification
Pin 1 +11V to +35V DC or
22 to 28V AC
Pin 2 Ground
FIGURE 5: OSD138C POWER SUPPLY CONNECTIONS
NOTE:
1. The OSD138 card version should be fixed into the OSD370 or OSD350 chassis using the
captivated screws
2. The cards can be plugged in or out of the chassis with power on or off.
2.2.4 BASIC CONNECTIONS
Data signals are connected to the 8-way terminal block connector as set out in Table 3.
The optical fiber cable must be terminated with the appropriate optical connector. Before connection,
inspect the ends of the connectors to ensure that no dust or dirt is present as it could contaminate the
modem connector and result in poor performance.
If it is necessary to clean the cable connectors, use isopropyl alcohol and lint free tissue to remove
contamination.
12345678
8-Way Data Connector
Power Connector
12

OPTICAL SYSTEMS DESIGN
DOC ID: 10105510
OSD138 OPERATOR MANUAL
PAGE 10
2.3 OSD138 OPERATION
When using the OSD138 for the first time, check that the unit is in good condition with no visible
damage.
If a card version is used, insert it in an appropriate slot on the OSD chassis and check that the indicators
illuminate as per Table 5 on power up. If a module version (OSD138C) is used, connect the unit to an
appropriate power source and check that the indicators illuminate as per Table 5 on power up.
Plug the digital signal source. Check that the “Power” (see Figure 6) indicator is illuminated green. If it
is not illuminating, there may be a problem with the unit and it should not be used. The "Tx Data" and
"Rx Data" should not illuminate.
Setting of RS422, RS232 or RS485 data transfer is done by setting switches on the 6 Way Data Mode
Switch according to Table 6. If RS485 is used Table 7 gives the settings for turnaround times.
Connect the Data cables to 8-way mating terminal connector according to Table 3 then plug it into the
connector on the OSD138 unit.
The LED indicator "Tx Data" should illuminate amber when Data is being transmitted.
2W RS485 OPERATION WARNING:
It is essential that the external equipment’s 2w RS485 data connection to the OSD138 be the
correct polarity ie
Data + ↔OSD138 I/O +
Data - ↔OSD138 I/O –
or
Data + ↔Pin 1
Data - ↔Pin 2
If these connections are reversed it is likely that the will be no communications or just one way
communications. Such a situation may be indicated by the Tx LED indicator on one unit
permanently glowing (ie it is transmitting) and the Rx LED on the other unit permanently
glowing (ie it is receiving).

OPTICAL SYSTEMS DESIGN
DOC ID: 10105510
OSD138 OPERATOR MANUAL
PAGE 11
Connect the optical cables to the receptacles located on the side of the case or on the front panel of the
card version. When the remote OSD138 is connected and receiving Data the "Rx Data" indicator
should illuminate amber. Please note that when using OSD138 1-fiber WDM option you must connect
WA with WB; refer to page 3 in this manual for descriptions of part numbers.
FIGURE 6: OSD138C SIDE VIEW
2.3.1 INDICATOR FUNCTIONS
The indicator function of the OSD138 modem is summarised in Table 5 below.
TABLE 5: OSD138 INDICATOR FUNCTION
INDICATOR AMBER GREEN LIGHT OFF
POWER - POWER ON POWER OFF
Tx DATA DATA
TRANSMITTED - NO DATA TRANSMITTED
Rx DATA DATA RECEIVED - NO DATA RECEIVED
2.3.2 DATA MODE CONTROL SWITCH SETTINGS
SW5 can add a bias voltage to the RS485 link so that when the link is inactive it pulls the link weakly
to the “Low” state. In normal operation the bias is desirable and the switch is left in the ON state.
However, there may be occasions where external devices already provide this bias. In such cases the
bias is disabled by setting this switch to the OFF state. The settings are given in Table 6 below.
2 wire RS485 operates by sending bursts of data onto a 2 wire bus. In order to determine the direction
of transmission, the OSD138 accepts the first Logical High data signal coming from either copper or
fiber as valid data and then inhibits any signals coming from the opposite direction. This inhibition
lasts from 10µs to 30ms after the active signal returns to the Logical Low state. This time is called the
RS485 Turnaround Delay and is user settable. The settings are given in Table 7 below.
OSD recommends that the unit be initially set to the minimum period of 10µS (ie SW2, SW3 and SW4
all in the ON position). Should there be communication errors change this delay one step at a time
until the system is working correctly.
Optical Connector
6-Way Mode Switch
LED – Tx Data
LED – Power
LED – Rx Data
Optical Connector (2 fiber version only)

OPTICAL SYSTEMS DESIGN
DOC ID: 10105510
OSD138 OPERATOR MANUAL
PAGE 12
The 6-way data control switch is located at the front of OSD138 modem. Switches SW1 (T1), SW5
(T5) and SW6 (T6) are used for setting the data mode options.
TABLE 6: DATA MODE SWITCH SETTINGS
SWITCH STATE FUNCTION
SW1(T1) OFF RS232/RS422
ON 2 WIRE AND 4 WIRE RS485
SW5(T5) OFF NO BIAS RS485
ON BIAS RS485
SW6(T6) OFF RS232/RS422 OR 4 WIRE RS485
ON INVERSE RS232 OR 2WIRE RS485
Switches SW2 (T2), SW3 (T3) and SW4 (T4) are used for setting RS485 turnaround time.
TABLE 7: RS485 TURNAROUND TIME SWITCH SETTINGS
SW2
(T2)
SW3
(T3)
SW4
(T4) RS485 TURNAROUND TIME
ON ON ON 10us
ON ON OFF 30us
ON OFF ON 100us
ON OFF OFF 300us
OFF ON ON 1ms
OFF ON OFF 3ms
OFF OFF ON 10ms
OFF OFF OFF 30ms
FIGURE 7: FRONT VIEW OF DATA MODE SWITCH
Switch setting is example
only
OFF
ON
1 2 3 4 5 6

OPTICAL SYSTEMS DESIGN
DOC ID: 10105510
OSD138 OPERATOR MANUAL
PAGE 13
3MAINTENANCE
3.1 INTRODUCTION
The following section outlines the fault-finding procedure for the OSD138 modems. Please take note of
the following:
σPersonnel without appropriate training should not attempt any maintenance except that outlined
below.
σIf further maintenance is attempted you are warned that every care should be taken to ensure that
internal measurements made while the equipment is operational are taken carefully as some
components within the unit are expensive and may be damaged by failure of any portion of their
support circuitry.
σSome components within the unit are electrostatic sensitive and ESD precautions should be taken
when performing maintenance upon the unit.
3.2 EXTERNAL INSPECTION
Visually check for the following:
σCheck that the correct power source is connected to the power socket.
σCheck that the data signals are connected to the modem correctly and that the distant OSD138
modem has been terminated correctly to any external equipment.
σInspect the optical connectors for any contamination and clean using isopropyl alcohol and a lint
free tissue if any contamination is detected.
σCheck that any external termination resistors are connected if the system configuration requires
them.
3.3 ROUTINE MAINTENANCE
σThere is no routine maintenance required with the OSD138.

OPTICAL SYSTEMS DESIGN
DOC ID: 10105510
OSD138 OPERATOR MANUAL
PAGE 14
4WARRANTY
Thank you for purchasing equipment designed, manufactured and serviced by Optical Systems Design
(OSD). OSD warrants that at the time of shipment, its products are free from defects in material and
workmanship and conforms to specifications. Our Warranty conditions are outlined below:
4.1 WARRANTY PERIOD
For warranty period, please call your local OSD distributor.
4.2 REPAIRS
Optical Systems Design reserves the right to repair or replace faulty modules/units. Please obtain a
“Return Material Authorisation” (RMA) form and number before returning goods.
Goods must be returned in adequate packing material to Optical Systems Design, Warriewood or its
nominated authorised representative for all repairs.
4.2.1 WARRANTY REPAIRS
Return shipments to OSD shall be at customer's expense and freight back to the customer will be at
OSD expense.
4.2.2 OUT-OF-WARRANTY REPAIRS
OSD reserves the right to repair or replace any faulty goods. Freight costs and insurance for both
journeys are met by the user. All equipment repaired by OSD will have a 3-Month Warranty from the
date of dispatch.
4.2.3 SITE REPAIRS
By agreement site repairs may be undertaken for which out of pocket, hotel and travel expenses will be
charged.
4.2.4 EXCLUSIONS
This warranty does not apply to defects caused by unauthorized modifications, misuse, abuse or
transport damage to the equipment. All modifications to OSD’s standard product will need written
authorization and will be charged at normal repair rates. All modifications are to be carried out by OSD
Technicians. Warranty is void if unauthorized removal and/or tampering with serial number and/or
repair labels is evident.

OPTICAL SYSTEMS DESIGN
DOC ID: 10105510
OSD138 OPERATOR MANUAL
PAGE 15

OPTICAL SYSTEMS DESIGN
DOC ID: 10105510
OSD138 OPERATOR MANUAL
PAGE 16

OPTICAL SYSTEMS DESIGN
DOC ID: 10105510
OSD138 OPERATOR MANUAL
PAGE 17

Optical Systems Design Pty. Ltd.
7/1 Vuko Pl. Warriewood 2102
P.O. Box 891 Mona Vale
N.S.W. Australia 2103
Telephone: [phone]
Facsimile: [phone]
Email: [e-mail]
Web Site: www.osd.com.au
OPTIC L
SYSTEMS
DESIGN
PTY LTD A.B.N. 83 003 020 504
Printed in Australia