Black Box RS-232, RS-485 User Manual

MARCH 1998 IC620A-F IC623A-M IC620A-M IC624A-F IC623A-F IC624A-M

RS-232/485 Converter

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: info@blackbox.com

Code: IC620A

SuperSwitch 8

10/100

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.

This unit is certified.

RS-232/485 CONVERTER

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.

NOM STATEMENT

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.

RS-232/485 CONVERTER

TRADEMARKS

Product names mentioned in this manual may be trademarks or registered trademarks of their respective companies and are hereby acknowledged.

TABLE OF CONTENTS

CONTENTS

1. Specifications . . . . . . . . . . . . . . . . . . . . . . . . . .6

2. Introduction . . . . . . . . . . . . . . . . . . . . . . . . . .8

2.1 Description . . . . . . . . . . . . . . . . . . . . . . .8

2.2 Features . . . . . . . . . . . . . . . . . . . . . . . . .9

3. Configuration . . . . . . . . . . . . . . . . . . . . . . . .11

3.1 Accessing the DIP Switches . . . . . . . . .11

3.1.1 DIP Switch S1 Settings . . . . . . . .16

3.1.2 DIP Switch S2 Settings . . . . . . . .18

3.2 Typical Applications . . . . . . . . . . . . . .20

4. Installation 24

4.1 Twisted-Pair Connection . . . . . . . . . . .22

4.1.1 Twisted-Pair Connections

Using Terminal Blocks . . . . . . .23

4.1.2 Twisted-Pair Connection

Using RJ-11 or RJ-45 . . . . . . . . .29

4.2 Wiring for Multipoint Circuits . . . . . .31

4.3 Connection to the EIA/TIA-574

Interface . . . . . . . . . . . . . . . . . . . . . . . .33

4.4 Operating the Converter . . . . . . . . . . .34

Appendix: EIA/TIA-574 Interface . . . . . . . . .35

RS-232/485 CONVERTER

1. Specifications

Transmission Format — Asynchronous

Data Rate — Up to 115,200 bps

Range — Up to 9 miles (14.4 km)

Serial Interface — EIA/TIA-574 standard RS-232 DCE

Connectors — IC620A-F: (1) DB9 female,

(1) 5-position terminal block,

IC620A-M: (1) DB9 male, (1) 5-position terminal block; IC623A-F: (1) DB9 female, (1) RJ-11 female, IC623A-M: (1) DB9 male, (1) RJ-11 female; IC624A-F: (1) DB9 female, (1) RJ-45 female, IC624A-M: (1) DB9 male, (1) RJ-45 female

Transmit Line — 2-wire or 4-wire unconditioned, unshielded, solid core, twisted pair

Transmit Mode — 4-wire, full- or half-duplex; 2-wire half-duplex

Control Signals — DSR turns ON immediately after the terminal raises DTR; DCD turns ON after recognizing the receive signal from the line;

CHAPTER 1: Specifications

CTS turns ON after the terminal raises RTS

RTS/CTS Delay — 8 msec or “no delay”

Carrier — The carrier is switch-selected either

continuous operation or switched operation, controlled by RTS

Surge Protection — 600 W power dissipation at 1 ms

Temperature — 32 to 122°F (0 to 50°C)

Humidity — 5 to 95%, noncondensing

Maximum Altitude — 10,000 ft. (304.8 m)

MTBF — 209,384 hours

Power — Draws operating power from EIA/TIA-574

data and control signals; no AC power or batteries required. If necessary, 6 to 12 VDC can be applied to pin 9 of the EIA/TIA-574 interface

Size — 2.5"H x 1.2"W x 0.75"D (6.4 x 3.1 x 1.9 cm)

Shipping Weight — 1 lb. (0.5 kg)

RS-232/485 CONVERTER

2. Introduction

2.1 Description

The RS-232/485 Converter (IC620A) is an ultraminiature interface converter. Requiring no AC power or batteries for operation, the Converter supports asynchronous communication up to

115.2 Kbps over one or two unconditioned twisted pairs. Distances up to 15 miles (24 km) are attainable at lower data rates (1.2 Kbps, 19 AWG twisted pair).

The Converter can handle up to 31 terminal drops in a multipoint polling environment. For RS-485 applications that require hardware handshaking, the Converter passes one control signal in each direction (see the last bullet point in Section 2.2 for an explanation). The Converter may be configured for high or low impedance, and the carrier may be set to “constantly on” or “controlled by RTS.” The unit can operate with or without “echo.” RTS/CTS delay may be set for “no delay” or “8 ms delay.”

There are three options for twisted-pair connection: terminal blocks with strain relief, RJ-11, or RJ-45. Silicon Avalanche Diodes provide 600 watts per wire of protection against harmful data-line transient surges.

CHAPTER 2: Introduction

Six models are available:

• DB9F/Term (IC620A-F)

• DB9M/Term (IC620A-M)

• DB9F/RJ-11 (IC623A-F)

• DB9M/RJ-11 (IC623A-M)

• DB9F/RJ-45 (IC624A-F)

• DB9F/RJ-45 (IC624A-M)

2.2 Features

• Operates asynchronously, point-to-point or multipoint, over 2 or 4 wires.

• Up to 31 multipoint device drops in a polling environment.

• Data rates up to 115.2 Kbps.

• Passes transmit and receive data, one control signal in each direction.

• No AC power or batteries required.

• Variable high/low impedance settings.

• Able to operate with or without “echo.”

• Carrier can be set as “constantly on” or “controlled by RTS.”

RS-232/485 CONVERTER

• Twisted-pair connection via strain relief, RJ-11, or RJ-45.

• Silicon Avalanche Diode surge protection.

• A Transmitter On signal received at the RS-485 RCV connection will cause DCD output at the RS-232 connector to assert High.

CHAPTER 3: Configuration

3. Configuration

The Converter is configured using two internal 4-position DIP switches. This section shows how to access the DIP switches, provides an overview of the factory-default settings, and describes all possible configuration options. For instructions on how to configure the Converter for specific applications, see Section 3.2.

3.1 Accessing the DIP Switches

The Converter has a main PC board and a daughterboard. DIP switch S1 is located on the underside of the main PC board (see Figure 3-1). DIP switch S2 is located on the top of the daughterboard (see Figure 3-2).

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