Ohaus RS422 User Manual

RS485 / RS422 Serial Interface Option Kit P/N 80500731 Instruction Manual

Paquete opcional de interfaz serial RS485 / RS422 N/P 80500731 Manual de instrucciones

Kit d’option d'interface série RS485 / RS422 Réf. 80500731 Manuel d’instructions

Optionssatz mit serieller RS485- / RS422-

Schnittstelle

Teilenr. 80500731 Bedienungsanleitung

Kit opzionale per l’interfaccia seriale RS485 / RS422 N/P 80500731 Manuale di istruzioni

RS485 / RS422 Option Kit EN-1

1. INTRODUCTION

This manual contains installation instructions for the RS485 / RS422 Serial Interface Option Kit used with Ohaus 5000 and 7000 Series Indicators.

Please read this manual completely before installation and operation.

CAUTION: READ ALL SAFETY WARNINGS BEFORE INSTALLING, MAKING CONNECTIONS, OR SERVICING THE RS485 / RS422 OPTION PC BOARD. FAILURE TO COMPLY WITH THESE WARNINGS COULD RESULT IN PERSONAL INJURY AND/OR PROPERTY DAMAGE. RETAIN ALL INSTRUCTIONS FOR FUTURE REFERENCE.

1.1 Kit Contents

Common parts

• RS485 / RS422 pc board

• Instruction manual

T51P, T71P parts (bag marked "T--P")

• Screws (2)

• Long cable

• Short cable

• Strain relief bushing

T51XW, T71XW parts (bag marked "T--XW")

• Screws (2)

• Long cable

• Short cable

• Cable tie

2. INSTALLATION

2.1 Safety Precautions

For safe and dependable operation of this equipment, please comply with all safety precautions mentioned in this manual.

• Installation of these options should only be performed by qualified personnel.

• Disconnect the equipment from the mains power supply before beginning installation.

• If batteries are installed in the indicator’s battery compartment, remove them before beginning installation.

• If the rechargeable battery option is installed in the indicator, disconnect the battery from the charging pc board before beginning installation.

EN-2 RS485 / RS422 Option Kit

2.2 RS485 / RS422 Wiring Guidelines

• Do not run more than one cable through the strain relief bushing.

• Do not use the cable that connects to the RS485 / RS422 pc board to make other connections.

• Twisted pair shielded cable is recommended.

• The strain relief bushing allows a cable diameter from 2 to 6 mm (0.08 to 0.23 in.).

• The terminal block on the RS485 / RS422 pc board allows a wire size of 0.14 to

1.5 mm

2

(26 to 16 AWG). Strip the wire ends to 6 mm (0.25 inch).

Figure 2.1 Wire Preparation

• Connect the wires to the terminal block J2 according to the Figure 2.2.

Operating Mode Jumper location

J4

W1

J1

W2

J2

Termination Resistance Jumper location

Receive - (RXD -)

Receive + (RXD +) Ground (GND)

Transmit - (TXD -)

Transmit + (TXD +)

Figure 2.2 RS485 Connections

RS485 / RS422 Option Kit EN-3

• The RS485 / RS422 option may be configured for either duplex (4-wire) or half duplex (2-wire) operating mode. Jumper W1 must be removed for duplex mode and installed for half duplex mode.

Figure 2.3 Duplex Figure 2.4 Half Duplex

• A ground connection is provided on connector J2 for systems that require it.

• A 120 Ohm termination resistance is provided by installing a jumper on connector

W2 of the RS485 / RS422 pc board. When W2 is shorted, the termination resistance is placed between the RXD + and RXD - lines.

• For more information about RS485 installations, refer to the document TSB-89-A

Application Guidelines for TIA/EIA-485-A

Industry Association.

.

, published by the Telecommunications

EN-4 RS485 / RS422 Option Kit

2.3 80500731 Installation in T51P and T71P

WARNING: ELECTRICAL SHOCK HAZARDS EXIST WITHIN THE

HOUSING. THE HOUSING SHOULD ONLY BE OPENED BY AUTHORIZED AND QUALIFIED PERSONNEL. REMOVE ALL POWER CONNECTIONS TO THE UNIT BEFORE OPENING. IF THE UNIT CONTAINS AN OPTIONAL RELAY CONTROL BOARD, ADDITIONAL AC OR DC POWER CONNECTIONS MAY STILL EXIST WITHIN THE HOUSING.

Refer to Figure 2.5 when performing these steps.

1. Remove the four screws from the corners of the rear housing.

2. Pull the front housing forward.

3. Remove the plastic hole cover located next to the RS232 connector on the rear

housing.

3. Install the strain relief bushing in the exposed hole.

4. Attach the RS485 / RS422 pc board to the rear housing using the two self

tapping screws supplied.

5. Connect the long cable to connector J1 or J4 on the RS485 / RS422 pc board

and connector J8 on the main pc board. Note: If the Relay option pc board is already installed, do not use the long cable. Connect the short cable between the RS485 / RS422 pc board and the Relay pc board instead.

6. Feed the communication cable through the strain relief bushing and under the

left side of the main pc board.

7. Attach the wires of the communication cable to the terminal block on the RS485

/ RS422 pc board.

8. Position the cable in the slots along the left side of the rear housing.

9. Pull the excess cable through the strain relief bushing and tighten the external

nut on the bushing.

10. Close the housing and reinstall the four screws.

RS485 / RS422 Option Kit EN-5

RS485 / RS422 pc board Screws (2)

Long

cable

9 pin

connectors

Connector

J8

External

cable

Strain relief bushing

RS232 connector

Figure 2.5. T51P, T71P

EN-6 RS485 / RS422 Option Kit

2.9 80500731 Installation in T51XW and T71XW

WARNING: ELECTRICAL SHOCK HAZARDS EXIST WITHIN THE

HOUSING. THE HOUSING SHOULD ONLY BE OPENED BY AUTHORIZED AND QUALIFIED PERSONNEL. REMOVE ALL POWER CONNECTIONS TO THE UNIT BEFORE OPENING. IF THE UNIT CONTAINS AN OPTIONAL RELAY CONTROL BOARD, ADDITIONAL AC OR DC POWER CONNECTIONS MAY STILL EXIST WITHIN THE HOUSING.

Refer to Figure 2.6 when performing these steps.

1. Remove the hex bolts from the corners of the rear housing.

2. Pull the front housing forward.

3. Attach the RS485 / RS422 pc board to the rear housing using the two machine

screws supplied.

4. Connect the long cable to connector J1 or J4 on the RS485 / RS422 pc board

and connector J8 on the main pc board. Note: If the Relay option pc board is already installed, do not use the long cable. Connect the short cable between the RS485 / RS422 pc board and the Relay pc board instead. Then skip to step 6.

5. Secure the long cable to the cable tie mount using the cable tie.

6. Remove the hole plug from one of the available strain relief bushings.

7. Feed the communication cable through the strain relief bushing.

8. Attach the wires of the communication cable to the terminal block on the RS485 /

RS422 pc board.

9. Pull the excess cable through the strain relief bushing and tighten the external nut

on the bushing.

10. Close the housing and reinstall the four hex bolts.

RS485 / RS422 Option Kit EN-7

RS485 / RS422 pc board 9 pin connectors Screws (2)

Long

cable

Cable tie

Cable

mount

Connector

J8

Rear

housing

Terminal

block

Cable

from

external

device

Strain

relief

bushing

Front

housing

Figure 2.6. T51XW, T71XW

EN-8 RS485 / RS422 Option Kit

3. OPERATION

Refer to the instruction manual supplied with indicator. Set up the RS485 / RS422 communication and printing parameters as described in the COM2 and PRINT2 menu sections. Send and receive data as described in the SERIAL COMMUNICATION section.

3.1 Use of RS485 Addresses

The RS485 / RS422 interface option allows up to 99 unique addresses. The use of scale addresses above the actual number of network connections allows for simplified swapping of scales on an existing network. Scales may be swapped with no risk of repeated addresses on a network. Multiple network systems could be created with unique scale addresses to give absolute scale identification.

The address may be set to OFF to allow compatibility with RS422 point-to-point or receive only multi-drop systems.

3.2 Sending Commands to the RS485 Interface

Commands sent to the RS485 interface must be preceded by the “@” character and its two digit address set up in the COM2 menu. For example, to send a print command to the RS485 interface that is setup as address 01, the user must send the following sequence: “@01P”.

3.3 Receiving Data from the RS485 Interface

Each response from the RS485 interface is preceded by the @ character and the two digit address. For example, a typical response to “@01P” would be “@01 10.005 kg”.

RS485 / RS422 Option Kit EN-9

4. MAINTENANCE

4.1 Service Information

For Service assistance in the United States, call toll-free 1-800-526-0659 between 8:00 AM and 5:00 PM Eastern Standard Time. An Ohaus Product Service Specialist will be available to assist you. Outside the USA, please visit our website www.ohaus.com to locate the Ohaus office nearest you.

5. TECHNICAL DATA

5.1 Specifications

Part Number 80500731 Standard Complies to TIA/EIA-485-A Input loading Allows up to 32 transceivers on the serial bus Addresses 01 to 99 Flow Control Software (Xon/Xoff)

EN-10 RS485 / RS422 Option Kit

Paquete opcional RS485 / RS422 ES-1

1. INTRODUCCIÓN

Este manual contiene instrucciones de instalación para el paquete opcional de interfaz serial RS485 / RS422 usado con los indicadores Ohaus serie 5000 y 7000.

Lea completamente este manual antes de instalar y trabajar con su báscula.

PRECAUCIÓN: LEA TODAS LAS ADVERTENCIAS DE SEGURIDAD ANTES DE INSTALAR, HACER CONEXIONES O DAR SERVICIO A LA TARJETA DE PC DE OPCIÓN RS485 / RS422. LA FALTA DE CUMPLIMIENTO DE ESTAS ADVERTENCIAS PODRÍA RESULTAR EN LESIONES PERSONALES Y/O DAÑOS A LA PROPIEDAD. CONSERVE TODAS LAS INSTRUCCIONES PARA REFERENCIA FUTURA.

1.1 Contenido del paquete

Partes comunes

• Tarjeta de PC RS485 / RS422

• Manual de instrucciones

Partes T51P, T71P (bolsa marcada "T--P")

• Tornillos de fijación (2)

• Cable largo

• Cable corto

• Manguito de alivio de tensión

Partes T51XW, T71XW (bolsa marcada "T--XW")

• Tornillos de fijación (2)

• Cable largo

• Cable corto

• Cinta para cable

2. INSTALACIÓN

2.1 Precauciones de seguridad

Para una operación segura y confiable de este equipo, siga todas las precauciones de seguridad mencionadas en este manual.

• La instalación de estas opciones sólo debe hacerse mediante personal calificado.

• Desconecte el equipo de la alimentación eléctrica principal antes de comenzar la instalación.

• Si hay baterías instaladas en el compartimiento de baterías del indicador, retírelas antes de comenzar la instalación.

• Si está instalada la opción de baterías recargables en el indicador, desconecte las baterías de la tarjeta de PC de carga antes de comenzar la instalación.

ES-2 Paquete opcional RS485 / RS422

2.2 Recomendaciones de cableado de la RS485 / RS422

• No instale más de un cable a través del manguito de alivio de tensión.

• No use el cable que se conecta con la tarjeta de PC RS485 / RS422 para hacer otras conexiones.

• Se recomienda cable blindado par trenzado.

• El manguito de alivio de tensión permite el paso de un cable de diámetro entre 2 a 6 mm (0.08 a 0.23 pulgadas).

• El bloque de terminales en la tarjeta de PC RS485 / RS422 permite calibres de cables de 0.14 a 1.5 mm cables 6 mm (0.25 pulgadas).

2

(26 a 16 AWG). Descubra los extremos de los

Figura 2.1 Preparación del cable

• Conecte los hilos en el bloque de terminales J2 como se indica en la Figura 2.2.

Ubicación del puente en modo de operación

J4

W1

J1

W2

J2

Ubicación del puente en la resistencia de terminación

Recepción - (RXD -)

Recepción + (RXD +) Tierra (GND)

Transmisión - (TXD -) Transmisión + (TXD +)

Figura 2.2 Conexiones de la RS485

Paquete opcional RS485 / RS422 ES-3

• La opción RS485 / RS422 puede configurarse para modo de operación dúplex (4 hilos) o medio dúplex (2 hilos). El puente W1 debe retirarse para el modo dúplex e instalarse para el modo medio dúplex.

Figura 2.3 Dúplex Figura 2.4 Medio dúplex

• Se proporciona una conexión a tierra en el conector J2 para los sistemas que la

requieren.

• Se proporciona una resistencia de terminación de 120 ohmios al instalar un

puente en el conector W2 de la tarjeta de PC RS485 / RS422. Cuando se cortocircuita el W2, la resistencia de terminación se coloca entre las líneas RXD + y RXD -.

• Para más información acerca de instalaciones de RS485, consulte el documento

TSB-89-A

Telecommunications Industry Association.

.

Application Guidelines for TIA/EIA-485-A

, publicado por la

ES-4 Paquete opcional RS485 / RS422

2.3 Instalación del 80500731 en T51P y T71P

ADVERTENCIA: EXISTE EL RIESGO DE DESCARGA ELÉCTRICA DENTRO

DE LA CAJA. LA CAJA DEBE SER ABIERTA SOLAMENTE POR PERSONAL AUTORIZADO Y CALIFICADO. DESCONECTE TODAS LAS CONEXIONES DE ENERGÍA HACIA LA UNIDAD ANTES DE ABRIRLA. SI LA UNIDAD CONTIENE UNA TARJETA DE CONTROL DE RELÉ OPCIONAL, ES POSIBLE QUE EXISTAN CONEXIONES DE ENERGÍA ADICIONALES DE CORRIENTE ALTERNA O DE CORRIENTE CONTINUA EN EL INTERIOR DE LA CAJA.

Consulte la Figura 2.5 cuando realice estos pasos.

1. Retire los cuatro tornillos de las esquinas de la caja posterior.

2. Tire de la caja anterior hacia adelante.

3. Retire la tapa de plástico del orificio ubicada junto al conector RS232 en la caja

posterior.

3. Instale el manguito de alivio de tensión en el orificio expuesto.

4. Fije la tarjeta de PC RS485 / RS422 en la caja posterior mediante los dos

tornillos autorroscantes incluidos.

5. Conecte el cable largo en el conector J1 o J4 en la tarjeta de PC RS485 /

RS422 y en el conector J8 en la tarjeta de PC principal. Nota: Si ya está instalada la tarjeta de PC de opción de relé, no use el cable largo. En su lugar, conecte el cable corto entre la tarjeta de PC RS485 / RS422 y la tarjeta de PC de relé.

6. Alimente el cable de comunicación a través del manguito de alivio de presión y

debajo del lado derecho de la tarjeta de PC principal.

7. Fije los hilos del cable de comunicación en el bloque de terminales en la tarjeta

de PC RS485 / RS422.

8. Coloque el cable en las ranuras a lo largo del lado izquierdo de la caja

posterior.

9. Jale el exceso de cable a través del manguito de alivio de tensión y apriete la

tuerca externa en el manguito.

10. Cierre la caja y reinstale los cuatro tornillos.

Paquete opcional RS485 / RS422 ES-5

Tarjeta de PC RS485 / RS422 Tornillos (2)

Cable

largo

9

conectores

de patilla

Conector

J8

Cable

externo

Manguito de alivio de tension

Conector RS232

Figura 2.5. T51P, T71P

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