Black Box TL553A-R3 Manuale utente

CUSTOMER

SUPPORT

INFORMATION

Order toll-free in the U.S. 24 hours, 7 A.M. Monday to midnight Friday: 877-877-BBOX

FREE technical support, 24 hours a day, 7 days a week: Call 724-746-5500 or fax 724-746-0746

Mail order: Black Box Corporation, 1000 Park Drive, Lawrence, PA 15055-1018

Web site: www.blackbox.com • E-mail: [email protected]

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

RS-232 DATA SHARER-2

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.

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.

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.

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

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

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

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)

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

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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