Optelecom 9482-DT User manual

Optelecom 9000 Series
Installation and Operation Manual
Model 9482-DT
Model 9482-DR
Four Channel Digital Video
Transmitter and Receiver Cards with
“Up-the-Coax” Control Data
9482D cards transport four video signals
with “up-the-coax” control data along with
two duplex data channels and duplex high-
speed port data over one optical fiber.
UM50372, Manual 9482DT/DR, Rev. E

3
Table of Contents
Section Page
Safety Instructions 4
Instrucciones de Seguridad 5
Sicherheitsanleitungen 6
Consignes de Sécurité 7
Fiber Information 8
Functional Description 9
9482DT Indicator and Connector Locations,Functions, and Settings 10
9482DR Indicator and Connector Locations, Functions, and Settings 12
Set Up and Operation of the 9482D 14
Operation of the 9482D with the Network Management System 22
Specifications for the Model 9482D 23

4
Safety Instructions
The optical devices used in this equipment are Hazard Level 1M. As required by IEC60825-1, the installer is responsible for insuring that the
label depicted below is present in the restricted locations where this equipment is installed.
This assembly contains parts sensitive to damage by electrostatic discharge (ESD). Use ESD precautionary procedures
when touching, removing, or inserting parts or assemblies.
The chassis into which this unit is installed must be housed in a properly rated NEMA enclosure.
When this unit is operated in extremely elevated temperature conditions, it is possible for internal and external metal
surfaces to become extremely hot. Care should be taken to insure this unit is installed in a restricted area where only
properly trained service personnel have access to the unit.
The safety information contained in this section, and on other pages of this manual, must be observed whenever this unit is operated,
serviced, or repaired. Failure to comply with any precaution, warning, or instruction noted in the manual is in violation of the standards of
design, manufacture, and intended use of the unit. TKH Security Solutions USA assumes no liability for the customer’s failure to comply
with any of these safety requirements.
RM-1
LASER RADIATION
DO NOT VIEW DIRECTLY WITH OPTICAL INSTRUMENTS (MAGNIFIERS)
CLASS 1M LASER PRODUCT
CAUTION:
DISCONNECTED OPTICAL CONNECTORS MAY EMIT OPTICAL ENERGY.
DO NOT VIEW BEAM WITH OPTICAL INSTRUMENTS (MAGNIFIERS)
This product contains Class 1M lasers or LEDs.
• Class 1M laser product according to IEC60825-1:1993+A1+A2
• CAUTION: Use of controls or adjustments or procedures other than those specified herein may result in hazardous radiation exposure.
• Precautions should be taken to prevent exposure to optical radiation when the unit is removed from its enclosure or when fiber is
disconnected from the unit.
•Laser radiation may be present on a fiber connection to this unit even when the power has been removed from the unit.
•This unit is intended for installation in locations where only trained service personnel have access to the fiber connections.
•The locations of all optical connections are listed in the Connection Locations and Function section of this manual.
•Optical outputs and wavelengths are listed in the Specifications section of this manual.
Hazard Level 1M
The border shall be black and
the background shall be yellow

5
Instrucciones de Seguridad
Los dispositivos ópticos usados en este equipo son de Nivel de Riesgo 1M. Según lo exige la norma IEC60825-1, el instalador es responsable
de asegurar que la etiqueta descrita a continuación esté presente en las áreas restringidas donde se instale este equipo.
Este ensamblaje contiene piezas sensibles al daño por descargas electrostáticas (ESD, por sus siglas en inglés). Use
procedimientos para prevenir las descargas electrostáticas al tocar, desmontar o insertar piezas o ensamblajes.
El chasis en el cual está instalada esta unidad debe estar dentro de un alojamiento debidamente calificado por NEMA.
Cuando se opera esta unidad en condiciones de temperatura sumamente elevada, es posible que las superficies internas
y externas de metal se pongan extremadamente calientes. Debe tenerse cuidado para asegurar que esta unidad se
instale en un área restringida donde sólo tenga acceso a la unidad el personal de servicio debidamente capacitado.
Debe observarse la información de seguridad contenida en esta sección, y en otras páginas de este manual siempre que se opere, dé
servicio o repare esta unidad. Si no se cumple con alguna precaución, advertencia o instrucción indicada en este manual se infringen los
estándares de diseño, fabricación y el uso destinado a la unidad. TKH Security Solutions USA no asume ninguna responsabilidad si el cliente
no cumple con alguno de estos reequisitos de seguridad.
RM-1
RADIACIÓN LÁSER
NO VER DIRECTAMENTE CON INSTRUMENTOS ÓPTICOS (DE AUMENTO)
PRODUCTO LÁSER CLASE 1M
PRECAUCIÓN:
LOS CONECTORES ÓPTICOS DESCONECTADOS PUEDEN AMITIR ENERGĺA ÓPTICA
NO VER EL HAZ CON INSTRUMENTOS ÓPTICOS (DE AUMENTO)
Este producto contiene rayos láser o diodos emisores de luz Clase 1M.
• Producto láser Clase 1M conforme a la norma IEC60825-1: 1993+A1+A2
•PRECAUCIÓN: El uso de los controles, ajustes o procedimientos, aparte de los aquí especificados, pueden ocasionar exposición peligrosa a la
radiación.
•Deben tomarse precauciones para evitar la exposición a la radiación óptica cuando se saque la unidad de su alojamiento, o cuando se
desconecte la fibra de la unidad
• Puede haber radiación laser en una conexión de fibra a esta unidad aun cuando se haya eliminado la corriente de la unidad.
•Este equipo está destinado a instalarse en lugares donde sólo el personal de servicio debidamente entrenado tenga acceso a las conexiones
de fibra.
•La ubicación de todas las conexiones ópticas se enumeran en la sección Ubicación de los conectores y funciones de este manual.
•Las salidas ópticas y longitudes de onda aparecen en la sección Especificaciones de este manual.
El bordo debe ser negro y
el fondo debe ser amarillo
Nivel de Riesgo 1M

6
Sicherheitsanleitungen
Die optischen Vorrichtungen in diesem Gerät haben Gefahrenstufe 1M. Wie vorgeschrieben durch IEC60825-1 ist der Installateur dafür
verantwortlich, sicherzustellen, dass die unten abgebildeten Schilder an den Orten mit eingeschränktem Zugang, an denen dieses Gerät
aufgestellt ist, vorhanden sind.
Diese Baugruppe enthält Teile, die durch elektrostatische Entladungen (ESD) beschädigt werden können.
Vorsichtsmaβnahmen
zum Schutz vor elektrostatischer Entladung treffen, wenn Teile oder Baugruppen berührt, ausgebaut oder eingefügt
werden.
Das Gestell, in dem diese Einheit eingebaut ist, muss in einem entsprechend klassifizierten NEMA-Schutzgehäuse
untergebracht
sein.
Wenn diese Einheit bei besonders hohen Temperaturen betrieben wird, können interne und externe Metallflächen
extrem heiβwerden. Es muss darauf geachtet werden, dass diese Einheit in einem Bereich mit eingeschränktem Zugang
aufgestellt wird, damit nur geschultes Wartungspersonal Zugang zur Einheit hat.
Die in diesem Abschnitt und auf anderen seiten dieses Handbuchs enthaltenen Sicherheitsinformationen müssen befolgt werden, wenn
diese Einheit betrieben, gewartet oder repariert wird. Falls Vorsichtsmassnahmen, Warnungen oder Anweisungen in diesem Handbuch
nicht befolgt werden, verstösst dies gegen die Konstruktions, und Herstellungsstandards und erfolgt im gegensatz zum vorgesehenen
Verwendungszweck dieser Einheit. TKH Security Solutions USA übernimmt keine Haftung für das Verabsäumnis des Kunden, diese
Sicherheitsanforderungen einzuhalten.
RM-1
LASER-STRAHLUNG
NICHT DIREKT MIT OPTISCHEN INSTRUMENTEN (LUPEN) ANSEHEN
LASER-PRODUKT DER KLASSE 1M
VORSICHT:
ABGEKLEMMTE OPTISCHE STECKVERBINDER KÖNNEN OPTISCHE ENERGIE FREI SETZEN
NICHT MIT OPTISCHEN INSTRUMENTEN (LUPEN) IN DEN STRAHL BLICKEN.
Dieses Produkt enthält Laser oder LEDs der Klasse 1M.
• Laserprodukt der Klasse 1M gemäß IEC60825-1:1993+a1+A2
• VORSICHT: Wenn die Bedienungselemente anders als hier beschrieben bzw. andere Einstellungen verwendet werden, kann es zu
schädlicher Strahlenaussetzung kommen.
•Es müssen Vorsichtsmaßnahmen getroffen werden, um Aussetzung an optischer Strahlung zu vermeiden, wenn die Einheit aus dem Gehäuse
genommen oder die Faseroptik von der Einheit getrennt wird.
• In einer Faseroptik-Verbindung dieser Einheit kan auch dann Laserstrahlung vorhanden sein, wenn die Stromversorgung zur Einheit
abgeschaltet wurde.
•Diese Einheit ist zum Einbau an Orten vorgesehen, an denen nur geschultes Personal Zugang zu den Faseroptik-Verbindungen hat.
•Die Lage aller optischen Verbindungen ist im Abschnitt über die Lage von Anschlüssen und Funktionsweise dieses Handbuchs zu finden.
•Optsiche Ausgänge und Wellenlängen sind im Abschnitt mit den technischen Daten dieses Handbuchs zu finden.
Gefahrenstufe 1M
Schwarzer Rand und
gelber Hintergrund

7
Consignes de Sécurité
Les appareils optiques utilisés dans cet équipement correspondent à un niveau de danger 1M. Comme exigé par la norme IEC60825-1, il
incombe à
l’installateur de s’assurer que l’étiquette ci-dessous est présente aux endroits d’accès limité où cet équipement est installé.
Cet ensemble contient des pièces sensibles aux décharges électrostatiques (ESD). Prendre les précautions relatives aux
ESD avant
de toucher, retirer ou insérer des pièces ou des ensembles.
Le châssis dans lequel est installé cet appareil doit être place dans une enceinte NEMA conforme aux spécifications
nominales.
Lorsque cet appareil fonctionne à une température ambiante extrêmement élevée, il est possible que les surfaces
métalliques internes et externes deviennent extrêmement chaudes. S’assurer que cet appareil est installé dans une zone
dont l’accès est limité à un personnel de maintenance correctement formé.
Les consignes de sécurité contenues dans cette section et dans le reste de ce manuel doivent être respectées a chaque fois que cet appareil
est utilisé ou fait l’objêt d’une maintenance ou d’une réparation. Le non-respect d’une précaution, d’un avertissement ou d’une instruction
figurant dans ce manuel est une violation des normes de conception, fabrication et indication d’usage de l’appareil. TKH Security Solutions
USA n’est pas responsable du non-respect de ces consignes de sécurité par le client.
RM-1
RAYONNEMENT LASER
NE PAS REGARDER DIRECTEMENT AVEC DES INSTRUMENTS OPTIQUES (LOUPES)
PRODUIT LASER DE CLASSE 1M
ATTENTION:
LES CONNECTEURS OPTIQUES DEBRANCHES PEUVENT EMETTRE UNE ENERGIE OPTIQUE.
NE PAS REGARDER LE FAISCEAU AVEC DES INSTRUMENTS OPTIQUES (LOUPES)
Ce produit contient des lasers ou diodes électroluminescentes de classe 1M.
• Produit laser de classe 1M conformément à IEC60825-1:1993+A1+A2
• ATTENTION: L’ utilisation de commandes ou réglages, ou de procedures différentes de celles indiquées ici risque de provoquer une
exposition dangereuse au rayonnement.
• Prendre des précautions pour empêcher une exposition au rayonnement optique lorsque l’ appareil est retiré de son boîtier ou lorsque la
câble optique fibre est débranché de l’ appareil.
•Un rayonnement laser pourra être present dans un câble optique branché sur cet appareil, même une fois l’alimentation coupée.
•Cet appareil est prévu pour une installation à des endroits où seul un personnel de maintenance formé accès aux câbles optiques.
•Les points de branchement de tous les cables optiques sont indiqués à la section Points de branchement et function de ce manuel.
•Les sorties et longueurs d’ onde optiques figurant à la section Caractéristiques techniques de ce manual.
Niveau de danger 1M
La bordure doit être noire et
le fond jaune

8
Fiber Information
This unit was manufactured with attention to fiber cleanliness by TKH Security Solutions USA. Beyond the
optical safety information contained in this manual, the following guidelines should be observed when
working with optical fibers.
The biggest problem is dirt!
It takes very little contamination to cause problems with optical fiber connections; cleanliness is extremely
important to proper operation of optical equipment.
1. Protect optical connectors by leaving the connector covers in place on unused fiber connections and on
the fiber tips themselves.
2. Personnel who remove and replace fibers should be equipped with a fiber cleaning kit. These are
inexpensive and can be obtained from any fiber equipment supply house. If you choose to, you can use
propanol and lint-free tissue to clean fibers.
a. Do not use isopropanol alcohol (typically called rubbing alcohol) mixed with water. This can cause
additional spots. (Caution: Pure isopropanol is very flammable! )
b. Use lintless tissues to clean fibers.
c. Clean the fiber with a folded tissue moistened with the propanol, pulling the connector tip across
the tissue, then turn the connector 90 degrees and repeat in a different spot on the tissue.
d. Don’t pull the fiber across and then push it back. This will put the dirt that was cleaned off back
on again.
e. Repeat the process on a dry, folded tissue.
3. When removing fibers, always clean them when replacing them no matter how long you had them off.
4. When connecting fibers, pay attention to the bend radius of the fibers. A general rule is to have a 3-inch
(8 cm) bend radius. A bend radius less than 3 inches is an attenuator and can cause optical signal loss.
5. Installers of fiber equipment should be equipped with the equipment manuals and an optical power
meter to measure the optical inputs and outputs in a system. An optical power meter is an inexpensive
tool that can save much time and effort in getting optical communications links up and running. Properly
equipped and trained installers can quickly determine the source of any problems that occur.

9
Functional Description
The 9482DT transmitter accepts four composite video signals in NTSC or PAL format via four BNC video input
ports. The baseband video signals are each sampled at a 15 Mhz rate by an A-to-D converter operating with
nine bits of precision. The resulting digital signals are multiplexed and serialized along with the serial data
from the two data ports and the high-speed port and converted to an optical signal for transmission over the
fiber. The control and data signals from the receiver end arrive via an optical receiver operating at a different
wavelength on the same fiber. The optical signal is converted back into a serial bit stream and demultiplexed
into data signals for the two data ports, the duplex high-speed port, and for the “up-the-coax” control signals.
The “up-the-coax” control signals are synchronized with the incoming video signals for output on the input
BNC connectors.
The 9482DR receiver accepts the optical signal from the transmitter and demultiplexes it into serial bit
streams for the video and the data. The video stream signal is converted back into four video signals that
are output at the BNC connectors. The data stream is demultiplexed and routed to the two data ports and
the high-speed port. Data input to the two data ports and the high-speed port is multiplexed together with
the “up-the-coax” control data that is input from the video output BNCs, serialized, and converted to an
optical signal for transport to the transmitter on the second wavelength.
The high-speed port provides a duplex 15 MB synchronous RS422 port. The port may be used as a 4-wire 1.5
Mbps asynchronous RS422 port; however, its primary purpose is to support optional accessory cards.
Currently, the port supports the 9961-C/9961A-C and 9962-C/9962A-C Option Module Host cards, the 9971-C
High-Speed Port to 10 Mb Ethernet Card with data ports, and the 9973-C High-Speed Port to 10 Base T 4-Port
Ethernet Switch card. Contact the factory to determine if there are other accessory cards available that will
operate on high-speed ports. RJ45 Cat5 cable used to connect the High-Speed port may not exceed 1.3
meters (4 feet) in length.
The 9482D cards operate on 6VDC as supplied by the chassis into which they are installed.

10
9482DT Indicator and Connector Locations,Functions, and
Settings
FIGURE 1
1. STATUS INDICATORS
This multicolor LED provides status information about the link as follows:
OFF: Indicates no power is applied to the card.
 Red (No Sync): Indicates the local unit is not receiving sufficient optical signal from the remote unit
or the local demux circuitry is not able to synchronize to the incoming signal.
 Yellow (Sync, No Loop): Indicates that the local unit is synchronized to the remote unit, but the
remote unit is reporting it has not synchronized to the local unit.
 Green (Sync, Loop –Normal Operation): Indicates that the local unit has synchronized to the signal
from the remote unit and the remote unit is reporting it has synchronized to the local unit.
2. VIDEO INPUT PRESENT INDICATORS 1, 2, 3, AND 4
Each of these indicators will illuminate green when a video signal is present on the respective video
input connector.
3. DATA ACTIVE INDICATORS 1, 2, 3, AND 4
Each of these indicators will illuminate green when there is PTZ command output signal activity present
on the respective video input connector.
4. DUPLEX DATA CONNECTOR
This RJ45 connector contains the connections for the two built-in data ports, a fixed RS232 data port,
and a user-programmable RS232, RS485, RS422, or Manchester data port. Refer to the Set Up section of
this manual for instructions on programming and connecting these ports.

11
5. OPTICAL CONNECTOR
The optical connection is made here.
6. VIDEO INPUT CONNECTORS 1, 2, 3, AND 4
These BNC connectors are the inputs for the video signals and outputs of the “up-the-coax” PTZ data.
7. DUPLEX HIGH-SPEED PORT CONNECTOR
This RJ45 connector provides the connections for the high-speed port. Refer to the Set Up section of this
manual for instructions on programming and connecting this port.
8. DIPSWITCH S1
This switch provides the means to set the communications configuration on the programmable data port.
Refer to the Set Up and Operation section for details on setting this switch.

12
9482DR Indicator and Connector Locations, Functions, and
Settings
FIGURE 2
1. STATUS INDICATORS
This multicolor LED provides status information about the link as follows:
OFF: Indicates no power is applied to the card.
 Red (No Sync): Indicates the local unit is not receiving sufficient optical signal from the remote unit
or the local demux circuitry is not able to synchronize to the incoming signal.
 Yellow (Sync, No Loop): Indicates that the local unit is synchronized to the remote unit, but the
remote unit is reporting it has not synchronized to the local unit.
 Green (Sync, Loop –Normal Operation): Indicates that the local unit has synchronized to the signal
from the remote unit and the remote unit is reporting it has synchronized to the local unit.
2. TX VIDEO INPUT PRESENT INDICATORS 1, 2, 3, AND 4
Each of these indicators will illuminate green when a video signal is present on the respective video
input connector at the transmitter end.
3. DATA ACTIVE INDICATORS 1, 2, 3, AND 4
Each of these indicators will illuminate green when there is PTZ command input signal activity present
on the respective video output connector.
4. DUPLEX DATA CONNECTOR
This RJ45 connector supports the two built-in data ports, a fixed RS232 data port, and a user-
programmable RS232, RS485, RS422, or Manchester data port. Refer the Set Up section of this manual
for instructions on programming and connecting these ports.

13
5. OPTICAL CONNECTOR
The optical connection is made here.
6. VIDEO OUTPUT CONNECTORS 1, 2, 3, AND 4
These BNC connectors are the outputs for the video signals and inputs for the “up-the-coax” PTZ data.
7. DUPLEX HIGH-SPEED PORT CONNECTOR
This RJ45 connector provides the connections for the high-speed port. Refer to the Set Up section of this
manual for instructions on programming and connecting this port.
8. DIPSWITCH S1
This switch provides the means to set the communications configuration on the programmable data port.
Refer to the Set Up and Operation section for details on setting this switch.

14
Set Up and Operation of the 9482D
Operation of the 9482DT and 9482DR cards consists of:
Setting the dipswitch on the Receiver and Transmitter cards for the data port mode per the application
requirements, if required
Making the proper connections for the data signals
Connecting accessory cards to the high-speed port as required
Connecting the fiber
CONFIGURING AND CONNECTING THE DATA PORTS
There are two serial duplex data ports on the 9482DT and DR. The connections for each of these ports are
accessed via the RJ45 8-pin connector. One of the two data ports is always RS232 and the other port may be
programmed via dipswitch S1 for RS232, RS422, RS485, Manchester, or Bi-Phase operation. Figure 3 and
Table 1 below show how the dipswitch is configured for the user-programmable data port. Additional figures
show how the electrical connections are made for the data ports. The set up switch is identical on the
transmitter and receiver.
FIGURE 3 FIGURE 4
TABLE 1 —DIPSWITCH SETTINGS
Dipswitch S1
Data Type
1
2
3
4
5
6
7
8
9
10
RS232
DOWN
(ON)
UP
(OFF)
UP
(OFF)
UP
(OFF)
UP
(OFF)
X
X
UP
(OFF)
DOWN
(ON)
UP (OFF)
RS422
UP
(OFF)
UP
(OFF)
DOWN
(ON)
DOWN
(ON)
DOWN
(ON)
T
T
DOWN
(ON)
UP
(OFF)
DOWN (ON)
RS485 2-Wire
DOWN
(ON)
DOWN
(ON)
UP
(OFF)
DOWN
(ON)
DOWN
(ON)
T
T
DOWN
(ON)
UP
(OFF)
DOWN (ON)
RS485 4-Wire
UP
(OFF)
DOWN
(ON)
UP
(OFF)
DOWN
(ON)
DOWN
(ON)
T
T
DOWN
(ON)
UP
(OFF)
DOWN (ON)
Manchester
DOWN
(ON)
DOWN
(ON)
DOWN
(ON)
UP
(OFF)
UP
(OFF)
DOWN
(ON)
T
X
UP
(OFF)
DOWN (ON)
Disabled
UP
(OFF)
UP
(OFF)
UP
(OFF)
X
X
X
X
X
X
X
KEY: ON = Switch On/DOWN; OFF = Switch Off/UP; T = ON (Signal Termination Resistor On) or OFF (Signal Termination Resistor Off); X = Don’t
Care (Switch setting does not affect operation).

15
TABLE 2 —DATA PORT CONNECTOR ELECTRICAL CONNECTIONS
Pin Number
Channel 1
RS232
Channel 2
RS232
Channel 2
RS422
2- or 4-Wire
Channel 2
RS485
2-Wire1
Channel 2
RS485
4-Wire
Channel 2
Manchester
Bi-Phase2
1
Chassis/ Signal
Common
Chassis/ Signal
Common
Chassis/ Signal
Common
Chassis/ Signal
Common
Chassis/ Signal
Common
Chassis/ Signal
Common
2
Input (Rx)
N/A
N/A
N/A
N/A
N/A
3
N/A
Output (Tx)
OUT +
I/O +
OUT +
OUT +
4
N/A
Input (Rx)
IN +
I/O +
IN +
IN +
5
N/A
N/A
IN –
I/O –
IN –
IN –
6
N/A
N/A
OUT –
I/O –
OUT –
OUT –
7
Output (Tx)
N/A
N/A
N/A
N/A
N/A
8
Chassis/ Signal
Common
Chassis/ Signal
Common
Chassis/ Signal
Common
Chassis/ Signal
Common
Chassis/ Signal
Common
Chassis/ Signal
Common
1Pins 3 and 4 and pins 5 and 6 are shorted internally in this mode and either or both may be used for the signal connections.
2 Manchester/Bi-Phase is normally a simplex connection, although this duplex unit will transport signals in either/both directions.
CONNECTING THE DATA PORTS
Data ports can be wired as shown in the following examples. Many different manufacturers of equipment
mark their terminals differently. The data ports on one end of the link may be set to a different data type
than the opposite end. For example, the Receiver end may be set for RS232 to communicate with a PC type
computer port and the opposite end of that data link may be set to RS422 or RS485. No external data
conversion units would be required.
RS232
RS232 is a “point-to-point” or “one-to-one” connection allowing only one transmitter and one receiver per
electrical link. Care should be taken to insure that the Tx or transmitting end on one end of the electrical link
is connected to a receiver or Rx signal on the other. Depending on whether the devices are Data
Communications Equipment (DCE) or Data Terminal Equipment (DTE), the Tx and Rx marking will change.
The 9482D RS232 terminals are called Tx (an output) and Rx (an input).
RS422 AND RS485
RS422 simplex is a “one-to-many” or “daisy chain” connection allowing up to 10 receivers to be electrically
connected to one transmitter. Markings on RS422 devices vary, with Tx+, Rx+, Tx–, and Rx–being common,
as well as TA, TB, RA, and RB. Normally the TA and RA signals are the –signals, with T being an output and
R being an input. The TB and RB signals are the + signals. The termination resistors on the last receiving
device in the electrical daisy chain of receivers should have its termination resistors turned on. Refer to the
example drawings at the end of this section for examples.
RS422 duplex is a one-to-one connection. In RS422 duplex, you are limited to one transmitter at each end of
the link. This is because to connect more than two transmitting devices on one electrical link in RS422 is not
allowed. Markings on RS422 devices vary with TX+, RX+, TX–, and RX–being common, as well as TA, TB, RA,
and RB. Normally the TA and RA signals are the –signals, with T being an output and R being an input. The
termination devices on both ends of the link should be enabled.

16
RS485 duplex 2- and 4-wire can be configured as “one- to-one“ or “one-to-many” as RS485 systems allow up
to 32 devices to be daisy-chained together in one electrical system. Markings on RS485 devices vary,
sometimes being marked the same as RS422 systems in 4-wire connection modes or marked as TD+, RD+,
TD–, and RD–. Normally the A and –signals are the –signals and the B or + signals are the + signals. In
2wire systems, there will only be a + and –signal. Care should be taken to insure the last device in a daisy
chain is terminated. Refer to the example drawings at the end of this section for examples.
Many manufacturers mark their equipment differently; read the accompanying instructions
carefully. A misunderstanding of the terminal markings and functions on data communications devices
causes most problems with data connections.
GROUNDING AND SHIELDS
The common ground/signal ground on the TKH Security USA equipment is also chassis ground. The ground
connection is required on both ends of an electrical connection when RS232 is used. Both the Tx (the output)
and Rx (the input) signals are single-ended connections (unbalanced) and are referenced to signal common.
In RS422 and RS485, the shield wire in the cable is to protect the cable from noise and electrical interference;
the + and –signals on the cable are differential (balanced) and do not require the ground be connected at
both ends. It is generally accepted practice to connect them both, however, better noise immunity may be
obtained by connecting the shield only at the end closest to true earth ground. This may also eliminate
ground loop electrical problems as well. If noise problems are encountered in a data transmission system
when RS422 or RS485 are used, try disconnecting the shield at the camera end of the data link.
EXAMPLES OF DATA CONNECTIONS TO 9482DT AND DR
FIGURE 5—DATA PORT 1RS232 CONNECTIONS

17
FIGURE 6—DATA PORT 2RS232 CONNECTIONS
FIGURE 7—DATA PORT 2RS422 OR RS485 4-WIRE CONNECTIONS

18
FIGURE 8—DATA PORT 2RS488 2-WIRE (DUPLEX)CONNECTIONS
FIGURE 9—DATA PORT 2MANCHESTER/BI-PHASE CONNECTIONS

19
FIGURE 10 —RS422 AND RS485 TERMINATION EXAMPLES

20
FIGURE 11 —RS422 TERMINATION EXAMPLES
FIGURE 12 —RS422 TERMINATION EXAMPLES