Black Box TL170A Manuale utente
JANUARY 1997
TL170A
TL170AE
RS-485 Repeater Hub
CUSTOMER SUPPORT INFORMATION
Order toll-free in the U.S.: Call 877-877-BBOX (outside U.S. call 724-746-5500)
FREE technical support 24 hours a day, 7 days a week: Call 724-746-5500 or fax 724-746-0746
Mailing address: Black Box Corporation, 1000 Park Drive, Lawrence, PA 15055-1018
POWER
CPU
PORT 4
PORT 3
PORT 2
PORT 1
RS485 Repeater Hub
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RS-485 REPEATER HUB
FEDERAL COMMUNICATIONS COMMISSION
AND
INDUSTRY CANADA
RADIO FREQUENCY INTERFERENCE STATEMENTS
This equipment generates, uses, and can radiate radio-frequency energy,
and if not installed and used properly, that is, in strict accordance with the
manufacturer’s instructions, may cause interference to radio communication.
It has been tested and found to comply with the limits for a Class A computing
device in accordance with the specifications in Subpart B of Part 15 of FCC rules,
which are designed to provide reasonable protection against such interference
when the equipment is operated in a commercial environment. Operation of
this equipment in a residential area is likely to cause interference, in which case
the user at his own expense will be required to take whatever measures may be
necessary to correct the interference.
Changes or modifications not expressly approved by the party responsible
for compliance could void the user’s authority to operate the equipment.
This digital apparatus does not exceed the Class A limits for radio noise emission from
digital apparatus set out in the Radio Interference Regulation of Industry Canada.
Le présent appareil numérique n’émet pas de bruits radioélectriques dépassant les limites
applicables aux appareils numériques de classe A prescrites dans le Règlement sur le
brouillage radioélectrique publié par Industrie Canada.
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RS-485 REPEATER HUB
NORMAS OFICIALES MEXICANAS (NOM)
ELECTRICAL SAFETY STATEMENT
INSTRUCCIONES DE SEGURIDAD
1. Todas las instrucciones de seguridad y operación deberán ser leídas antes
de que el aparato eléctrico sea operado.
2. Las instrucciones de seguridad y operación deberán ser guardadas para
referencia futura.
3. Todas las advertencias en el aparato eléctrico y en sus instrucciones de
operación deben ser respetadas.
4. Todas las instrucciones de operación y uso deben ser seguidas.
5. El aparato eléctrico no deberá ser usado cerca del agua—por ejemplo,
cerca de la tina de baño, lavabo, sótano mojado o cerca de una alberca,
etc..
6. El aparato eléctrico debe ser usado únicamente con carritos o pedestales
que sean recomendados por el fabricante.
7. El aparato eléctrico debe ser montado a la pared o al techo sólo como sea
recomendado por el fabricante.
8. Servicio—El usuario no debe intentar dar servicio al equipo eléctrico más
allá a lo descrito en las instrucciones de operación. Todo otro servicio
deberá ser referido a personal de servicio calificado.
9. El aparato eléctrico debe ser situado de tal manera que su posición no
interfiera su uso. La colocación del aparato eléctrico sobre una cama,
sofá, alfombra o superficie similar puede bloquea la ventilación, no se
debe colocar en libreros o gabinetes que impidan el flujo de aire por los
orificios de ventilación.
3
RS-485 REPEATER HUB
10. El equipo eléctrico deber ser situado fuera del alcance de fuentes de calor
como radiadores, registros de calor, estufas u otros aparatos (incluyendo
amplificadores) que producen calor.
11. El aparato eléctrico deberá ser connectado a una fuente de poder sólo del
tipo descrito en el instructivo de operación, o como se indique en el
aparato.
12. Precaución debe ser tomada de tal manera que la tierra fisica y la
polarización del equipo no sea eliminada.
13. Los cables de la fuente de poder deben ser guiados de tal manera que no
sean pisados ni pellizcados por objetos colocados sobre o contra ellos,
poniendo particular atención a los contactos y receptáculos donde salen
del aparato.
14. El equipo eléctrico debe ser limpiado únicamente de acuerdo a las
recomendaciones del fabricante.
15. En caso de existir, una antena externa deberá ser localizada lejos de las
lineas de energia.
16. El cable de corriente deberá ser desconectado del cuando el equipo no
sea usado por un largo periodo de tiempo.
17. Cuidado debe ser tomado de tal manera que objectos liquidos no sean
derramados sobre la cubierta u orificios de ventilación.
18. Servicio por personal calificado deberá ser provisto cuando:
A: El cable de poder o el contacto ha sido dañado; u
B: Objectos han caído o líquido ha sido derramado dentro del
aparato; o
C: El aparato ha sido expuesto a la lluvia; o
D: El aparato parece no operar normalmente o muestra un cambio en
su desempeño; o
E: El aparato ha sido tirado o su cubierta ha sido dañada.
4
RS-485 REPEATER HUB
TRADEMARKS USED IN THIS MANUAL
UL is a registered trademark of Underwriters
Laboratories Incorporated.
Any other trademarks mentioned in this manual are
acknowledged to be the property of the trademark owners.
5
RS-485 REPEATER HUB
1. Specifications
Interface — RS-485 2-wire
Protocol — Asynchronous
Data Rates — Up to 115,200 bps
Indicators — (6) LEDs: Ports 1 through 4,
Power, and CPU
Connectors — (5) DB9 female, (1) 5-pin
DIN power input
Enclosure — Metal
Approvals — Power supply: UL®, CSA
MTBF — 100,000 hours
Maximum
Altitude — 15,000 feet (4570 m)
Operating
Temperature — 32 to 158°F (0 to 70°C)
Relative Humidity
Tolerance — 10 to 95%, noncondensing
6
RS-485 REPEATER HUB
Power — TL170A: 115 VAC, 60 Hz,
17 VAC (center-tapped),
20 watts;
TL170AE: 230 VAC,
50 Hz, 17 VAC (center-
tapped), 20 watts
Size — 1.5"H x 6.75"W x 7"D
(3.8 x 17.2 x 17.8 cm)
Weight — 3 lb. (1.4 kg)
7
RS-485 REPEATER HUB
2. Introduction
The RS-485 Repeater Hub expands one RS-485
2-wire port to four RS-485 2-wire ports. The CPU
port connects to your existing 2-wire multidrop line
as usual, and up to four RS-485 2-wire lines may be
connected to the remaining ports.
A typical application uses a polled environment
where a master device polls the connected
equipment, and each unit has a unique identity. All
connected devices receive the poll from the master,
but only the device whose identity matches the poll
request will respond.
The RS-485 Repeater Hub delivers the poll request
to all four ports and delivers the response to the CPU
port. The Hub contains terminations that can be
applied by installing the appropriate internal shunt.
You can select termination individually for each port,
including the CPU port.
All ports have LED indicators, which flash when the
Hub receives data. A Power LED glows steadily when
proper power is supplied.
All data connections are made via female DB9
connectors. The metal case is internally grounded
8
RS-485 REPEATER HUB
to the earth ground carried to the AC wall receptacle
via the wallmount transformer. Using the two tabs in
the enclosure, the Hub can be mounted on a flat
surface.
You can also install a surge-suppressed power strip
between to AC transformer and the AC line to
provide additional protection to the Hub. When
using a power strip, make sure the earth-ground
connection is secure from the AC outlet through
the strip to the Hub.
You can special-order an RS-485 Repeater Hub with
an optional surge protector built into the unit. Call
Technical Support for more information.
9
RS-485 REPEATER HUB
3. Installation
WARNING!
Ground-potential differences are a hazard not only to
your equipment, but to you as well. During installation,
never work with any device connected to the AC power
line. Make all connections to all devices before
connecting any of them to sources of AC power.
1. Keeping in mind the warning above, position
the RS-485 Repeater Hub in a clean, stable
environment near a 115-volt AC power source.
Fasten the Hub to a flat surface using two #10
screws.
NOTE
The Hub’s metal enclosure is connected to earth ground
via the AC transformer. The surface to which the Hub is
mounted should also be at local earth-ground potential
if the surface is metal. Fastening the Hub with screws
which scuff the paint on the Hub’s mounting tabs will
establish an earth-ground connection to a metal
mounting surface.
2. Route your main data cable from the main data
line to the Hub’s CPU port. Secure the
connections by tightening the data connector’s
screwlocks.
3. Route up to four more data cables from your
devices to the remaining port(s) on the Hub.
Secure the connectors.
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