Black Box SME-422 Manual de usuario

DSR CTS TXD PWR DCD RTS RXD

SME 422

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]

NOVEMBER 1993

ME101A-R2 ME101AE-R2 ME101-C

ME102A-R2 ME102AE-R2 ME102C-R2

ME103A-R2 ME103AE-R2 ME103C-R2

ME105A-R2 ME105AE-R2

Synchronous Modem Eliminator

SME–422

SME–V.35

SME–530

SME–X.21

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

UL is a registered trademark of Underwriters Laboratories

Incorporated.

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.

SYNCHRONOUS MODEM ELIMINATORS SME–422, –V.35, –530, –X.21

Contents

Chapter Page

1. Specifications ............................................................................................... 1

2. Introduction ................................................................................................. 3

2.1 Overview ................................................................................................ 3

2.2 LED Indicators ...................................................................................... 4

2.3 Power Supply ......................................................................................... 5

2.4 Guidelines for Cable Length ................................................................ 5

3. Configuration ............................................................................................... 6

4. Installation .................................................................................................. 19

5. Troubleshooting ........................................................................................ 20

5.1 Calling Black Box ................................................................................ 20

5.2 Shipping and Packaging ..................................................................... 20

Appendix: Connector Pinouts ......................................................................... 21

CHAPTER 1: Specifications

System

Requirements — SME–422 card (ME101-C) only: RM011 or

compatible rack;

SME–V.35 card (ME102C-R2) and SME–530 card

(ME103C-R2) only: RM060 or compatible rack

Interface — SME–422: EIA RS-449/RS-422

SME–V.35: CCITT V.35

SME–530: EIA RS-530

SME–X.21: CCITT X.21

Clock — Internal or external from either attached device

(user-selectable)

Data Rate — Any speed up to 1.344 Mbps that evenly divides

2.688 Mbps (user-selectable)*

*Special versions of our SMEs are available that support slightly different ranges of data rates

from the standard model’s. Selected data rates supported by the two most popular specials are

listed in Tables 3-6 and 3-7 on pages 14 and 15. Call our technical support for more information.

Maximum

Distance — Up to 2,000 ft. (609.6 m) on each side, depending on

cable quality and data rate

User Controls — All models: (2) Internal 6-position DIP switches for

selecting the data rate;

All models but SME–V.35: (11) Internal jumpers for

setting various options;

SME–V.35: (5) Internal jumpers for setting various

options

Indicators — (6) LEDs: TXD, RXD, RTS, CTS, DCD or RLSD,

and PWR

Connectors — All models: (1) 5-pin Molex®female: low-voltage

AC power;

Card models (1) 3-position card-edge connector:

Rack power;

1. Specifications

SYNCHRONOUS MODEM ELIMINATORS SME–422, –V.35, –530, –X.21

SME–422: (2) DB37 female

SME–V.35: (2) 34-pin M-block female

SME–530: (2) DB25 female

SME–X.21: (2) DB37 female; provided with

(2) adapter cables, DB37 male to DB15 female

Power — 120-VAC standalone models:

From wallmount power supply PS146:

Optimal input: 115 VAC, 60 Hz at 100 mA;

Input range: 104 to 127 VAC, 45 to 65 Hz;

Output: 17 VAC CT at 700 mA;

240-VAC standalone models:

From wallmount power supply PS145E:

Optimal input: 230 VAC, 50 Hz at 50 mA;

Input range: 207 to 253 VAC, 45 to 65 Hz;

Output: 17 VAC CT at 700 mA

Card models: From rack’s power-supply interface

All models: Consumption: 7.5 to 13 W

Temperature — 32 to 122˚F (0 to 50˚C)

Humidity — 0 to 95% noncondensing

Enclosure

(Standalone Units) — Plastic

Size — Standalone models: 2.1"H x 8.8"W x 11.5"D

(5.3 x 22.4 x 29.2 cm);

Card models: 7.5"H x 11"D (19.1 x 27.9 cm)

Weight — Standalone models: 2 lb. (0.9 kg);

Card models: 0.9 lb. (0.4 kg)

CHAPTER 2: Introduction

2.1 Overview

With a Synchronous Modem Eliminator (SME), you can establish

communication between two synchronous devices (terminals, CPUs, etc.) at

greater distances than would be possible without an SME, without having to

buy a modem or line driver. We offer four different SME models, one for

each of four different synchronous interfaces:

• The SME–422 (our product codes are ME101A-R2 for the 120-VAC

standalone, ME101AE-R2 for the 240-VAC standalone, and ME101-C

for the card version) connects devices that use the RS-422 interface.

• The SME–V.35 (our product codes are ME102A-R2 for the 120-VAC

standalone, ME102AE-R2 for the 240-VAC standalone, and ME102C-R2

for the card version) connects devices that use the CCITT V.35 interface.

• The SME–530 (our product codes are ME103A-R2 for the 120-VAC

standalone, ME103AE-R2 for the 240-VAC standalone, and ME103C-R2

for the card version) connects devices that use the RS-530 interface.

• The SME–X.21 (our product codes are ME105A-R2 for the 120-VAC

standalone and ME105AE-R2 for the 240-VAC standalone) connects

devices that use the CCITT X.21 interface.

Before you install your SME, you’ll have to configure it by setting its internal

straps (jumpers) and switches. Two options are configured with DIP switches:

clock source and data rate. (All SME models except the SME–X.21 can either

provide internal clocking or use an external source. The SME–X.21 uses its

internal clock only. All SME models can be set to use a variety of data rates up

to 1.344 Mbps.) Besides the DIP switches, all SME models have additional

straps for customizing their interface leads.

Once the unit is configured, installation is simple: Run cable from the

devices to connectors J1 and J2 on the rear panel of the SME, then plug in

the SME’s power cord.

Figure 2-1 on the next page shows typical SME applications.

2. Introduction

SYNCHRONOUS MODEM ELIMINATORS SME–422, –V.35, –530, –X.21

2.2 LED Indicators

The six LED indicators on the front panel of the SMEs function as follows:

2.3.1 T

RANSMIT

ATA

(TXD)

Lit when the device connected to J1 is sending data.

2.3.2 R

ECEIVE

ATA

(RXD)

Lit when the device connected to J1 is receiving data.

2.3.3 R

EQUEST TO

END

(RTS)

Lit when the device connected to J1 raises RTS.

2.3.4 C

LEAR TO

END

(CTS)

Lit when J1 is clear to send.

Figure 2-1. Typical SME applications.

SME–X.21

MAINFRAME

COMPUTER

MAINFRAME

COMPUTER

Length of Cable;

422 Interface

specified

MAINFRAME

OR MINI

SME-422 REMOTE

CONTROLLER

MINI, OR

MAINFRAME

SME–422, SME–V.35, or

SME–530 ,

CHAPTER 2: Introduction

2.3.5 P

OWER

(PWR)

Lit when power is applied to the unit (that is, when the unit’s power supply

is working and is plugged into a working outlet).

2.3.6 D

ATA

ARRIER

ETECT

(DCD)

ECEIVE

INE

IGNAL

ETECT

(RLSD)

SME–422: Lit when the device connected to J1 raises RTS.

SME–V.35: Lit when the device connected to J2 raises RTS.

SME–530: Lit when the device connected to J1 outputs RLSD (DCD).

SME–X.21: Lit when the SME raises Receiver Ready on J1.

2.3 Power Supply

All 120-VAC standalone models of the SME come with UL®listed wallmount

power supply PS146, whose input is rated at 115 VAC/60 Hz. All 240-VAC

standalone models of the SME come with VDE listed wallmount power supply

PS145E, whose input is rated at 230 VAC/50 Hz. The output of both power

supplies is 17 VAC center-tapped at 0.7 amps. Their output connectors, which

you should plug into connector P1 on the SME when you’re ready to finish

the installation, are indexed to help prevent incorrect insertion.

2.4 Guidelines for Cable Lengths

The maximum length of cable you can run between the

SME and either

of the devices you want to attach to it depends on:

• the cabling standards of the interface that your SME uses.

• the data rate you select (higher data rates often require shorter cable

runs).

• noise sources between the SME and the device (cable run too close to

noise sources will not be able to successfully carry data).

Other concerns not mentioned here might also affect the maximum distance

attainable in your application. For additional information, refer to the

published standards for your SME’s interface (EIA RS-422 or RS-530, CCITT

V.35 or X.21).

SYNCHRONOUS MODEM ELIMINATORS SME–422, –V.35, –530, –X.21

The pages that follow this one contain charts and diagrams that will help you

configure your SME:

• Tables 3-1 through 3-4 discuss the possible settings of the individual straps

(jumpers) inside each SME model. Use the straps to configure several

different options for your SME.

NOTE

Clock timing is supplied to each port (J1 and J2) in the form of a “send timing”

signal (derived from that port’s clock source) and a “receive timing” signal

(derived from the other port’s clock source). The straps that determine how the

SME gets its clock for each port are among those described in Tables 3-1 through

3-4. In the descriptions of these straps, the A position is called “internal,” the B

position is called “recovered,” and the C position is called “external.” When a

port’s timing is internal, the clock is the SME’s internal clock signal. When a port’s

timing is external, the SME gets the clock from that port’s “terminal timing” signal.

When a port’s timing is recovered, the SME gets the clock from the opposite port’s

“terminal timing” signal. For most applications both ports’ straps would be set to

A (internal clock). A small number of applications (those in which one device

supplies the timing across the line) would require one strap set to B and the other

set to C. Extremely few if any applications would require both straps set to C, or

one strap set to C and the other to A. The SME will not work at all if both straps are

set to B, or if one strap is set to B and the other to A. The CCITT X.21 standard

does not include a “terminal timing” signal, so SME–X.21 units won’t work if either

strap is set to B or C.

• Table 3-5 gives the possible settings of the data-rate switches S1 and S2

inside each standard SME model. Use these switches to set the SME’s data

rate to that used in your system. Tables 3-6 and 3-7 show the data-rate

settings for SMEs with special clock modifications (see the notes on pages

1, 14, and 15).

• Figures 3-1 through 3-3 show the printed-circuit-board layout for each

SME model.

Use the appropriate tables and figures to set your SME’s internal straps

and switches (substitute Table 3-6 or 3-7 for Table 3-5 if necessary):

• For the SME–422, use Tables 3-1 and 3-5 and Figure 3-1.

• For the SME–V.35, use Tables 3-2 and 3-5 and Figure 3-2.

• For the SME–530, use Tables 3-3 and 3-5 and Figure 3-3.

• For the SME–X.21, use Tables 3-4 and 3-5 and Figure 3-1.

3. Configuration

CHAPTER 3: Configuration

Table 3-1. SME–422 Strap Settings

STRAP FUNCTION

W1 This strap is used to tie the chassis ground and signal ground together.

The unit comes from the factory without the grounds tied common.

W2 Incoming Call (IC) on J1 (Pin 15) is connected to either ground (A-B) or

+5V (B-C). The unit comes from the factory connected to ground (A-B).

W3 Incoming Call (IC) on J2 (Pin 15) is connected to either ground (A-B) or

+5V (B-C). The unit comes from the factory connected to ground (A-B).

W4 In the A-B position, Data Mode on J1 (Pins 11 and 29) is “OFF” and

connected to Terminal Ready (Pins 12 and 30). In the B-C position, Data

Mode is “ON.” The unit is shipped from the factory with Data Mode OFF

(A-B).

W5 In the A-B position, Data Mode on J2 (Pins 11 and 29) is “OFF” and

connected to Terminal Ready (Pins 12 and 30). In the B-C position, Data

Mode is “ON.” The unit is shipped from the factory with Data Mode OFF

(A-B).

W6 Determines the Clear to Send delay on J1:

Position A = 0 ms (no delay)

Position B = 10 ms

Position C = 50 ms

The unit is shipped from the factory with the delay set for 10 ms.

W7 Determines the Clear to Send delay on J2:

Position A = 0 ms (no delay)

Position B = 10 ms

Position C = 50 ms

The unit is shipped from the factory with the delay set for 10 ms.

W8 In the A-B position, Receiver Ready on J2 (Pins 13 and 31) is derived

from Request to Send on J1 (Pins 7 and 25). In the B-C position,

Receiver Ready on J2 is connected to Signal Ground and is constantly

held ON. The unit is shipped from the factory with Receiver Ready

derived from Request to Send (A-B).

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