Black Box 232/CL-E User manual

CUSTOMER

SUPPORT

INFORMATION

SEPTEMBER 1998

CL050A

CL050A-R2

CL050C

CL050AE

RM005

RS-232 ´Current Loop

Interface Converter

(232/CL-E)

232/CL-E

RX TX

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]

FCC STATEMENT

FEDERAL COMMUNICATIONS COMMISSION

AND

CANADIAN DEPARTMENT OF COMMUNICATIONS

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 the Canadian Department of

Communications.

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 le ministère des Communications du Canada.

INSTRUCCIONES DE SEGURIDAD

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.

INSTRUCCIONES DE SEGURIDAD

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 ↔CURRENT LOOP INTERFACE CONVERTER

TRADEMARKS

All applied-for and registered trademarks are the property of their respective

owners.

RS-232 ↔CURRENT LOOP INTERFACE CONVERTER

CONTENTS

1. Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8

2. Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9

3. Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10

4. The Current-Loop Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11

4.1 Testing for Other Active Devices on the Current Loop . . . . . . .11

4.1.1 LED Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11

4.1.2 Voltmeter Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12

4.2 Connecting the Current Loop Wires to the CL050A . . . . . . . . .12

4.2.1 4-Wire Current Loop . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12

4.2.2 2-Wire Current Loop . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13

4.3 Switch SWA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17

4.4 Switch SWB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17

5. The RS-232C Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18

5.1 The RS-232C Interface Pinout . . . . . . . . . . . . . . . . . . . . . . . . . . .18

5.2 Switch SWC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19

5.2.1 DCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19

5.2.2 DTE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19

6. Operations and Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20

6.1 Indicators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20

6.2 Self Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21

7. Current Loop Rack and Cards . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22

7.1 Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22

7.2 Specifications for RM005 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .23

RS-232 ↔CURRENT LOOP INTERFACE CONVERTER

Connectors — RS-232/CCITT V.24: DB25 (female)

Current Loop: 4 screw terminals

Indicators — (2) LEDs indicating RS-232 port activity:

RX for Receive Data from an RS-232 external device

TX for Transmit Data to an RS-232 external device

Switches — 10-position DIP switch for current-loop transmission mode

10-position DIP switch for RS-232 DTE or DCE configuration

4-position DIP switch for electrical current in the current loop

Maximum Transmission

Distance — (based on using 24-AWG solid copper wire):

at 9600 bps: 300 to 400 meters

(984 to 1,312 feet)

at 300 bps: 1000 to 3000 meters

(3,281 to 9,843 feet)

Power — Input — 115/220 VAC, 50 to 60 Hz, 12W

Output — 18 VAC, center tapped, 8VA

Size — 1.75"H x 5.5"W x 8.5"D (4.4 x 14 x 21.6 cm)

Weight — 1.5 lb. (0.7 kg)

CAUTION

Make sure you have the right power supply for your local power. If not,

call Technical Support to get a replacement power supply.

1. Specifications

RS-232 ↔CURRENT LOOP INTERFACE CONVERTER

The RS-232 ↔Current Loop Interface

Converter (CL050) is a bidirectional

self-contained unit that enables the

interconnection of a digital

20/30/60mA unipolar current-loop

interface with an RS-232 interface. The

CL050 cannot be used with an analog

current loop (4 to 20 mA) or bipolar

current loop.

Current loop was designed to transfer

data in a noisy environ-ment with as

much integrity as possible. The

maximum distance that the CL050 can

be placed from other devices on the

current loop (see Chapter 1) is based

on using 24 AWG under ideal

conditions, with the CL050 designated

as the active device in a point-to-point

configuration.

The CL050 can act as either an active

or passive device on the current loop.

As an active device, the CL050 supplies

20, 30, or 60 ma loop current at 18

VDC for operation. As a passive device,

the CL050 will not supply loop current,

but it will operate with 20, 30, or 60 ma

unipolar current at up to 30 VDC.

WARNING!

Only one device on the current

loop may be active. If more than

one device is active, each of the

devices will be permanently

damaged.

Refer to Sections 4.1 and 4.2 for

instructions on testing the current loop

and connecting it to the CL050.

Switch selections allow for half-duplex

or full-duplex operation; 20, 30, or 60

mA loop current; and configuring the

CL050 as either DTE or DCE.

Two LEDs monitor data flow.

If you ordered the CL050A-R2, you

should have received cables with it.

A 220-volt power supply (CL050E) is

also available.

2. Introduction

Figure 2-1. With the CL050, you can interconnect a

current loop interface and an RS-232 interface.

Current

Loop

Device

CL050

Device using

RS-232 Interface

RS-232 ↔CURRENT LOOP INTERFACE CONVERTER

1. Remove the screw located at the

center of the bottom cover.

2. Remove the top cover.

3. Lift the back panel from its guide.

4. Insert the power supply receptacle

into the 4-prong plug (See Figure

7-1 on page 16. The 4-prong plug

is near W1). The receptacle

should be aligned so that the lip is

on the upward side. DO NOT

PLUG THE POWER SUPPLY

INTO AN AC OUTLET!

5. Test your current loop for active

devices. See Section 4.1 on page

11.

6. Connect your current loop to the

CL050. See Section 4.2 on page

12.

7. Insert the back panel into its

guide, making sure the power-

supply cable and current-loop

cable exit through the holes

provided for them.

8. Set switches SWA, SWB and SWC

to the desired positions. The

CL050 is shipped with SWA set to

Full-Duplex, Passive; SWB set to

20mA receive; 20mA transmit; and

SWC set to DTE. See Sections 4.3,

4.4, and 5.2, respectively, on pages

11 and 13 for more information

on these switches.

9. Replace the top cover.

10. Replace the screw.

11. Attach your RS-232C cable.

12. Plug the power supply into an AC

outlet. The CL050 is now ready

for operation.

3. Installation

RS-232 ↔CURRENT LOOP INTERFACE CONVERTER

4.1 Testing for Other Active Devices

on the Current Loop

You must test for an active device on

the current loop if you plan to have the

CL050 supply loop current.

WARNING!

Only one device on the

current loop may be active.

If more than one device is

active at the same time,

each device will be

permanently damaged.

There are two tests that you can run.

Either is sufficient.

4.1.1 LED T

EST

(1) Unplug the CL050 from the AC

outlet.

(2) Set the SWA switch to full duplex,

passive.

(3) Attach the T- of the 4-wire current

loop device (or “-” in a 2-wire current

loop) to R- of the CL050A.

(4) Attach the T+ of the 4-wire current

loop device (or “+” in a 2-wire current

loop) to R+ of the CL050A. See Figure

4-1 (4-wire current loop) or Figure 4-2

(2-wire current loop).

(5) Plug the CL050 into the AC outlet.

4. The Current-Loop Interface

Figure 4-1. Wiring configuration for a 4-wire current loop LED test.

Figure 4-2. Wiring configuration for a 2-wire current loop LED test.

T+

T-

R+

R-

T+

T-

R+

R-

T+

R-

T+

T-

R+

R-

CL050A

R+

R-

T+

T-

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