Black Box USB Director RS-232 Manual de usuario

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]

CUSTOMER

SUPPORT

INFORMATION

NOVEMBER 1994

IC221A-R3

RS-232 ↔V.35 Interface Converter

DSR CTS DATA PWR DSR CTS DATA

232 V.35

RS-232 ↔V.35 INTERFACE CONVERTER

FEDERAL COMMUNICATIONS COMMISSION

RADIO FREQUENCY INTERFERENCE STATEMENT

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 required 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 the Canadian Department of Communications."

"Le présent appareil numérique n'émet pas de bruits radioélectriques dépassant les limites applicables aux

appareils numériques de la classe A prescrites dans le Règlement sur le brouillage radioélectrique édicté

par le ministère des Communications du Canada."

RS-232 ↔V.35 INTERFACE CONVERTER

CONTENTS

1.0 SPECIFICATIONS ......................................................................................................................................4

2.0 INTRODUCTION ......................................................................................................................................5

3.0 INSTALLATION.........................................................................................................................................6

3.1 DIP Shunt Settings........................................................................................................................7

3.2 Terminal Ready Option Strap W7................................................................................................8

3.3 LEDs ..............................................................................................................................................8

4.0 GROUND STRAP AND PIN CONNECTIONS ........................................................................................9

4.1 Ground Strap ................................................................................................................................9

4.2 Pin Connections..........................................................................................................................10

RS-232 ↔V.35 INTERFACE CONVERTER

Speed — Up to 64 Kbps

UL — E87344

CSA — LR58206

MTBF — 125,905 hours

Interface — RS-232, V.35; both interfaces DTE/DCE selectable

Connectors — RS-232: DB25 male; V.35: (1) 34-pin female "M" block

Environmental — Maximum storage temperature: 70° C

Maximum operating temperature: 50° C

Power — 115 VAC, 60 Hz, 13 watts (230-VAC model available on request)

Size — Standalone: 2.3"H x 8"W x 11.9"D (5.8 x 20.3 x 30.2 cm)

Rackmount: Card: 1.2"H x 7.5"W x 10.5"D (3 x 19.1 x 26.7 cm)

Weight — 2 lb. (0.9 kg)

1.0 Specifications

CHAPTER 2: Introduction

The RS-232↔V.35 Interface Converter comes in

standalone units for 115-VAC and 230-VAC

operation. A card version is also available for

rackmounted units. The Card is used for both

115-VAC and 230-VAC operation.

The RS-232↔V.35 Interface Converter provides

bidirectional conversion of all the commonly used

V.35 and RS-232 signals. The unit is designed for

use with one port configured as Data Terminal

Equipment (DTE) and the other port as Data

Communications Equipment (DCE). You should

not operate the unit with both ports configured as

DCE or both ports configured as DTE.

The unit has two jumper-selectable configurations.

One connects RS-232 modem equipment to V.35

terminal equipment (DTE to DCE). The other

connects V.35 modem equipment to RS-232

terminal equipment (DCE to DTE). Both

configurations allow bidirectional data transfer.

Figure 2-1 shows a typical application of the

RS-232↔V.35 Interface Converter.

2.0 Introduction

RS-232

TERMINAL

COMPUTER

(DTE)

RS-232/V.35

DCE DTE V.35

MODEM

DSU

(DCE)

RS-232/V.35

DTE DCE V.35

TERMINAL

COMPUTER

(DTE)

RS-232

MODEM

(DCE)

Figure 2-1. Typical Application of the RS-232<—>V.35 Interface Converter.

RS-232 ↔ V.35

INTERFACE

CONVERTER

RS-232 ↔ V.35

INTERFACE

CONVERTER

RS-232 ↔V.35 INTERFACE CONVERTER

To install the unit, follow the steps below and refer

to Figure 3-1.

1.Attach the cable from the RS-232 device to the

25-pin male connector (J1) on the rear panel of

the RS-232↔V.35 Interface Converter.

2.Attach the cable from the V.35 device to the

34-pin female connector (J2) on the rear panel

of the RS-232↔V.35 Interface Converter.

3.Plug the 4-pin power cord into the receptacle on

the rear panel of the case. Do not plug the

power module into an AC outlet until after the

DIP shunts and Strap W7 are set as explained in

Sections 3.1 and 3-2.

3.0 Installation

Figure 3-1. Strap Selections for RS232 DCE ↔V.35 DTE.

PWR

DATA

CTS

DSR

U11 U10 U9

DCE

DTE

DCE

DTE

DCE

DTE

DCE

XW2B

XW3A

XW3B

XW1A

XW1B

XW2A

XW4B

XW4A

J1 RS-232

INTERFACE

V.35

INTERFACE

AC POWER

CONNECTOR

C3C2C1C4

VR1

DSR

CTS

DATA

RS232

INDICATORS

V.35

INDICATORS

CHAPTER 3: Installation

3.1 DIP Shunt Settings

The RS-232↔V.35 Interface Converter has two

jumper-selectable configurations determined by

DIP shunt settings located inside the unit on the

printed circuit board. Figure 3-1 shows how to

configure the RS-232 side of the converter for DCE

and the V.35 side as DTE. This configuration should

be used when connecting RS-232 DTE equipment

to V.35 DCE equipment, such as a computer to a

CSU/DSU.

U11 U10 U9

DCE

DTE

DCE

DTE

DCE

DTE

DCE

XW2B

XW3A

XW3B

XW1A

XW1B

XW2A

XW4B

XW4A

C3C2C1C4

VR1

Figure 3-2. Strap Selections for V.35 DCE ↔ RS232 DTE .

Figure 3-2 shows the converter configured for RS-

232 DTE and the V.35 side as DCE. This

configuration should be used when connecting RS-

232 DCE equipment to V.35 DTE equipment.

RS-232 ↔V.35 INTERFACE CONVERTER

3.2 Terminal Ready Option Strap W7

NOTE

All printed circuit boards identified with

a date code of 8926 and later have the

revised connector with Pin H

supported. In earlier models, Strap W7

controls Pin 20 only.

Strap W7 controls the Terminal Ready (Pin H) and

DTR (Pin 20) function. When the RS-232 port is

configured as DCE, and the V.35 port is configured

as DTE, a jumper over B and C forces Terminal

Ready (Pin H) out of the V.35 port (default). The

jumper between A and B passes DTR (Pin 20) to

Terminal Ready (Pin H).

With the RS-232 port configured as DTE and the

V.35 port configured as DCE mode, a jumper from

B to C forces DTR (Pin 20) out of the RS-232 port

(default). A jumper between A and B passes

terminal ready (Pin H) to DTR (Pin 20).

NOTE

Due to the fact that the LEDs indicate

only incoming signals, the true status

of DTR out will not be reflected by the

LED when strap W7 is placed in the

B-C position. Refer to the diagrams in

Section 4.2.

3.3 LEDs

The RS-232↔V.35 Interface Converter is equipped

with seven LED indicators located on the front

panel. The PWR LED illuminates when power is

applied to the unit.

The three left-most LEDs indicate the state of the

INCOMING V.35 signals. If the V.35 interface is

configured as DTE, the LEDs have the following

meanings:

•DSR — Reflects the state of DSR (Pin E)

•CTS — Indicates the CTS (Pin D)

•Data — Indicates Rx data (Pins R and T)

If the V.35 interface is configured for DCE, the

LEDs have the following meanings:

•DSR — Not connected, off.

•CTS — Indicates the status of RTS (Pin C)

•Data — Indicates Tx data (Pins P and S)

The three right-most LED indicators show the state

of the INCOMING RS-232 signals. If the RS-232

interface is configured as DTE, the LEDs have the

following meanings:

•DSR — Indicates the state of DSR (Pin 6)

•CTS — Indicates the state of CTS (Pin 5)

•Data — Indicates Rx data (Pin 3)

If the RS-232 interface is configured as DCE, the

LEDs have the following meanings:

•DSR— Indicates the state of DTR (Pin 20)

•CTS — Indicates the state of RTS (Pin 4)

•Data — Indicates Tx data (Pin 2)

Table 3-1. Setting the DIP Shunts.

RS-232 INTERFACE V.35 INTERFACE

DCE/DTE Put Shunt In: DCE/DTE Put Shunt In:

DCE XW1A and XW2A DCE XW3A and XW4A

DTE XW1B and XW2B DTE XW3B and XW4B

CHAPTER 4: Ground Strap and Pin Connections

4.1 Ground Strap

Signal grounds (Pin 7 on the RS-232 interface and

Pin B on the V.35 interface) are connected to each

other but not connected to chassis ground (Pin A).

However, for applications requiring the grounds at

a common reference point, the grounds can be

connected by installing a jumper strap across W1

located at the rear of the printed circuit board

between J1 and P1.

4.0 Ground Strap and Pin Connections

SIGNAL GROUND

CLEAR TO SEND

RECEIVE LINE SIGNAL DETECT

LOCAL LOOPBACK

TEST PATTERN

REMOTE LOOPBACK

RECEIVED DATA

RECEIVE TIMING

CHASSIS GROUND

REQUEST TO SEND

DATA SET READY

DATA TERMINAL READY

TEST MODE

REMOTE LOOPBACK

TRANSMITTED DATA

TRANSMIT TIMING

YTRANSMIT TIMING

Figure 4-1. V.35 Interface (male).

Figure 4-2. RS-232 Interface (male).

1 PROTECTIVE GROUND

2 TRANSMITTED DATA

3 RECEIVED DATA

4 REQUEST TO SEND

5 CLEAR TO SEND

6 DATA SET READY

7 SIGNAL GROUND/COMMON RETURN

8 RECEIVED LINE SIGNAL DETECTOR

DCE TRANSMITTER SIGNAL ELEMENT TIMING 15

RECEIVER SIGNAL ELEMENT TIMING 17

DATA TERMINAL READY 20

SIGNAL QUALITY DETECTOR 21

RING INDICATOR 22

DTE TRANSMITTER SIGNAL ELEMENT TIMING 24

RS-232 ↔V.35 INTERFACE CONVERTER

4.2 Pin Connections

The pin connections for RS-232 DCE to V.35 DTE

are shown below.

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