Black Box TL553A-R3 Manuale utente
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SUPPORT
INFORMATION
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Mail order: Black Box Corporation, 1000 Park Drive, Lawrence, PA 15055-1018
JULY 2000
TL553A-R3
TL553AE-R3
TL554A-R3
TL554AE-R3
TL601A-R2
TL601AE-R2
RS-232 Data Sharers
PWR
MASTER PORT
CTS CD RXD
RTS DISABLED
RTS ENABLED
RTS STATUS
ABCD E F G H
RS-232 DATA SHARER-8
MASTERPORT
CTSCDRXDRTSDISABLED
RTSENABLED
PWR
RTS STATUS
AB
RS-232 DATA SHARER-2
1
FCC AND IC STATEMENTS
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 J 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.
2
RS-232 DATA SHARERS
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.
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.
3
NOM STATEMENT
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-232 DATA SHARERS
TRADEMARKS USED IN THIS MANUAL
IBM is a registered trademark of International Business Machines
Corporation.
Molex is a registered trademark of Molex Incorporated.
Any other trademarks mentioned in this manual are acknowledged to be the property
of the trademark owners.
TABLE OF CONTENTS
5
5
Contents
Chapter Page
1. Specifications ............................................................................................. 6
2. Introduction ............................................................................................... 8
2.1 Typical Synchronous Application ...................................................... 9
2.2 Typical Asynchronous Application .................................................. 11
3. The Front Panel ....................................................................................... 11
3.1 The LEDs ........................................................................................... 11
3.2 The RTS Toggle Switches ................................................................. 11
4. Jumper-Selectable Options ...................................................................... 12
4.1 Jumper W1—Tying Signal Ground to Frame Ground ................... 13
4.2 Jumper W2—RTS Delay ................................................................... 14
4.3 Jumper W3—RXD Broadcast or Gated Mode ................................. 14
4.4 Jumper W4—Priority Selection (4- and 8-Port Models Only) ........ 15
4.5 Timeout Jumpers .............................................................................. 15
5. Installation ................................................................................................ 18
6. Operation (Port Selection) ..................................................................... 20
7. Troubleshooting ...................................................................................... 22
7.1 Calling Your Supplier ....................................................................... 22
7.2 Shipping and Packaging ................................................................... 22
Appendix: Pin Descriptions ........................................................................... 23
6
RS-232 DATA SHARERS
1. Specifications
Interface........................................Serial EIA RS-232C/CCITT V.24;
Master Port: DTE; Slave Ports: DCE
Protocol........................................Asynchronous or synchronous
Operation......................................Full- or half-duplex
Contention Type ..........................RTS/CTS
Clock Source................................External (provided by DCE)
Data Rates....................................Transparent to all data rates up to 115.2 Kbps
User Controls...............................Front-panel switches: RTS enabled/disabled;
Jumpers: RTS Delay (0 or 25 ms);
RXD Broadcast or Gated Mode;
RTS Timeout Period (10 or
30 seconds or none);
RTS Timeout Signal (RXD only or
RXD and TXD)
Indicators......................................RS-232 Data Sharer–2: (6) LEDs (Power, RTS A, RTS B,
Master Port CD, CTS, and RXD)
RS-232 Data Sharer–4: (8) LEDs (Power, RTS A through
RTS D, Master Port CD, CTS,
and RXD)
RS-232 Data Sharer–8: (12) LEDs (Power, RTS A through
RTS H, Master Port CD, CTS,
and RXD)
Connectors...................................RS-232 Data Sharer–2: (3) DB25 female data ports;
RS-232 Data Sharer–4: (5) DB25 female data ports;
RS-232 Data Sharer–8: (9) DB25 female data ports
Pins Supported............................DB25 pins 1 through 10, 15, 17, 20, 22
Power............................................Data Sharers TL553A-R3, TL554A-R3, and TL601A-R2:
From wallmount power supply PS154:
Input: 115 VAC, 60 Hz at 100 mA;
Output: 17 VAC CT at 700 mA;
Data Sharers TL553AE-R3, TL554AE-R3, and TL601AE-R2:
From in-line power supply PS154E:
Input: 230 VAC, 50 Hz at 50 mA;
Output: 17 VAC CT at 750 mA
Operating Temperature...............32 to 140° F (0 to 60° C)
Storage Temperature...................–4 to 158° F (–20 to 70° C)
Humidity .......................................0 to 95% relative humidity, noncondensing
CHAPTER 1: Specifications
7
Mean Time Between Failures
(ground-benign environment) ..RS-232 Data Sharer–2: 180,000 hours;
RS-232 Data Sharer–4: 95,000 hours;
RS-232 Data Sharer–8: 65,000 hours
Enclosure .....................................Steel
Size................................................RS-232 Data Sharer–2: 2.5"H x 8.1"W x 11.3"D
(6.4 x 20.6 x 28.7 cm);
RS-232 Data Sharer–4,
RS-232 Data Sharer–8: 2.9"H x 12.5"W x 11.1"D
(7.4 x 31.8 x 28.2 cm)
Weight...........................................RS-232 Data Sharer–2: 2.4 lb. (1.1 kg);
RS-232 Data Sharer–4: 5.0 lb. (2.3 kg);
RS-232 Data Sharer–8: 5.5 lb. (2.5 kg)
8
RS-232 DATA SHARERS
The RS-232 Data Sharer allows multiple devices, such as mainframe
controllers, terminals, etc., to share a single RS-232 line. You can use this
device to let multiple terminals or controllers share a single modem or
multiplexor port—so you spend less money on telephone-line lease charges
and modem costs.
The RS-232 Data Sharer is available in three models:
• TL601A-R2 and TL601AE-R2 (RS-232 Data Sharer 2-Port)
• TL553A-R3 and TL553AE-R3 (RS-232 Data Sharer 4-Port)
• TL554A-R3 and TL554AE-R3 (RS-232 Data Sharer 8-Port)
Each of the RS-232 Data Sharers supports the following features:
• Transparency to data.
• Transparency to data rates up to 115.2 Kbps.
• Synchronous and asynchronous data transmission.
• Either hardware priority or round-robin priority for selection of terminal
ports. In hardware priority, requests for access to the shared line are
prioritized according to ports’ letter designations: The port represented
by the letter closest to the start of the alphabet is given access. In round-
robin priority, access to the shared line is strictly sequential: Ports receive
access in alphabetical order.
• Front-panel switches for enabling and disabling the RTS (Request to
Send) signal on each input port. With this feature, you can isolate faulty
units or perform process-of-elimination diagnostics. This is because when
the RTS signal is disabled on a port, that port can’t contend for access.
• Jumper-selectable options: RTS delay (0 or 25 ms), RXD operation (gated
or broadcast mode), hardware-prioritized vs. round-robin port selection,
RTS-timeout period (32 seconds, 10 seconds, or disabled), and RTS-
timeout signal (RXD and TXD or TXD only)
In all applications, the Sharer shares a single RS-232 line among multiple
devices. Beyond that, applications will vary depending on the function of the
device connected to the Sharer’s master port. Typical synchronous and
asynchronous applications are described on the following pages.
2. Introduction
CHAPTER 2: Introduction
9
2.1 Typical Synchronous Application
In this kind of application, the devices sharing the line (the “slave devices”)
are usually controllers at a remote site. The shared line runs from the RS-232
Data Sharer to a modem (the “master device”) that is ultimately linked to a
host computer. The controllers must be configured for multipoint modems,
with the Request to Send (RTS) signal switched. RTS has to be switched
because if a controller keeps RTS high, the Sharer will think the controller is
streaming and deny it access to the line (see Section 4.5).
Suggested jumper settings for a Sharer in this type of application:
√Jumper W2 in A–B position (0 ms RTS delay)
√Jumper W3 in A–B position (RXD Broadcast Mode)
√Jumper W4 (4- and 8-Port Sharers only) in A–B position (sequential
polling)
√Timeout-period jumpers in C position (timeout disabled); settings of
timeout-signal jumpers irrelevant.
The RS-232 Data Sharer is transparent to communications protocol (SDLC,
BSC, etc.), data-encoding technique (NRZ, NRZI, etc.), and addressing.
IBM
Mainframe
Modem Modem
Leased
Line
IBM
Controllers
(5294, 3274, etc.)
Figure 2-1. Synchronous application—an RS-232 Data Sharer
in an IBM®multipoint environment.
RS-232 Data
Sharer-4
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