Black Box MPI Series Manuale utente

NOVEMBER 1996

ME761A-M/F

Mini Driver MPI

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

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

MINI DRIVER

MPI

MINI DRIVER MPI

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.

TRADEMARKS USED IN THIS MANUAL

Any trademarks mentioned in this manual are acknowledged

to be the property of the trademark owners.

MINI DRIVER MPI

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.

MINI DRIVER MPI

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.

MINI DRIVER MPI

1. Specifications

Protocol: Asynchronous

Speed: Up to 19.2 Kbps

Operation: 4-wire full- or half-duplex, point-

to-point or multipoint

Interface: RS-232/CCITT V.24

Connectors: (1) DB25 male or female,

(1) 5-screw terminal block

Power: From RS232 interface; +6 VDC on

pins 2, 4, or 20

Size: 0.9"H x 2.1"W x 4.3"D

(2.3 x 5.3 x 10.9 cm)

Weight: 0.2 lb. (0.1 kg)

Distance Charts:

Point-to-Point Applications

19-AWG 24-AWG 26-AWG

1200 - 19200 bps 4.0 mi. 2.5 mi. 1.5 mi.

(6.5 km) (4.0 km) (2.5 km)

Multipoint Applications

No. of

Drops 3 5 7

19-AWG 19-AWG 19-AWG

1200 -

19200 bps 1.0 mi 0.75 mi. 0.5 mi.

(1.6 km) (1.2 km) (0.8 km)

2. Introduction

The Mini Driver MPI asynchronous line driver is

used for local data distribution. It connects full-or

half-duplex asynchronous terminals to computers.

The unit operates over unconditioned 4-wire

telephone line, and ensures data integrity for

distances up to four miles depending on the gauge

and data rate (see the Distance Charts, above).

MINI DRIVER MPI

You can strap the Mini Driver MPI to be either

constantly on, or to be controlled by the Request to

Send signal. Operation with controlled carrier

enables the connection of the Mini Driver MPI in a

multipoint configuration (see Figure 1). You can also

use controlled carrier in applications requiring the

passing of a control signal end-to-end—the RTS one

one Mini Driver MPI is passed to the DCD on the

other unit.

Figure 1. Mini Driver MPI In A Multipoint Application

The Mini Driver MPI features a switch selectable

DTE/DCE option. The unit can operate as a DTE

in order to connect to another DCE, such as a

multiplexer port, without the use of cross cable.

You can operate the Mini Driver MPI without

Async Host

Async Terminals

Mini

Driver

MPI

OFFICE COMPLEX

Building A:

MIS DEPT.

Building B:

ACCT. DEPT

Up to seven

drops

4-Wire Unshielded

twisted-pair cable

connecting it to the mains supply. Simply use ultra

low power from the standard RS232C/V.24 data and

control signal voltages. The unit fully operates even

if only Transmit Data and Receive Data are

connected—no control signals are needed. Both

positive and negative signals are generated in

compliance with RS232C/V.24 standards, regardless

of constantly high or constantly low Transmit Data.

Low transmit level minimizes cross-talk onto adjacent

circuits within the same cable. Data is transmitted

and received at a balanced impedance, ensuring

excellent immunity to circuit noise.

The Mini Driver MPI is couples to the telephone line

through isolation transformers which, in conjunction

with electronic circuitry, protect against AC or DC

overvoltages. The transformers are rated at over

1,500V RMS, making the line driver suitable for

connection to local circuits provided by most

telephone administrations.

MINI DRIVER MPI

3. Installation

The Mini Driver MPI is easy to install. Follow the

steps below.

1.Separate the two parts of the plastic cover

by firmly pressing the marked places on the

sides, starting at the cable end.

2.Connect the 4-wire telephone line to the

screw terminal block; transmit pair to

"XMT" and receive pair to "RCV". Please

note the correct polarities. If you are using

shielded cables, connect the cable shield to

the "ground" terminal (optional).

3.The following polarity must be observed:

+XMT on the local Mini Driver MPI must

be connected to +RCV on the remote Mini

Driver MPI

-XMT on the local Mini Driver MPI must be

connected to -RCV on the remote Mini

Driver MPI

(Polarity is opposite on the second pair of

wires.)

4.The Mini Driver MPI is factory set for DCE.

To operate the unit as DTE, change the

switch to the DTE position (see Figure 2).

5.Set the CARRIER strap to either ON

(carrier on continuously), or CTRL (carrier

controlled by RTS). See Figure 2

6.To close the unit, press the two halves of

the cover together.

7. Plug the unit directly into the 25-pin

connector of the terminal or computer

port, and fasten with the screws on each

side of the connector.

Figure 2. Strapping Diagram

RCV

GND

XMT

CTRL ON

CARRIER DCE

DTE

MINI DRIVER MPI

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