Hach-lange SC 200 Modbus Module User Manual Manual de usuario descargar pdf (Pagina 4)

This symbol indicates the presence of devices sensitive to Electro-

static Discharge (ESD) and indicates that care must be taken to

prevent damage with the equipment.

Electrical equipment marked with this symbol may not be disposed of

in European public disposal systems after 12 August of 2005. In

conformity with European local and national regulations (EU Directive

2002/96/EC), European electrical equipment users must now return

old or end-of-life equipment to the Producer for disposal at no charge

to the user.

Product overview

Modbus was developed as a PLC communication protocol.

Modbus uses a master/slave data exchange technique. The master

(typically a PLC) generates queries to individual slaves. The slaves, in

turn, reply back with a response to the master. A Modbus message

contains the information required to send a query or request, including

the slave address, function code, data and a checksum.

Installation

C A U T I O N

Personal injury hazard. Only qualified personnel should conduct the tasks

described in this section of the manual.

Install the module to the controller

D A N G E R

Electrocution Hazard. Always remove power from the instrument

before making any electrical connections.

D A N G E R

Electrocution Hazard. High voltage wiring for the controller is conducted behind

the high voltage barrier in the controller enclosure. The barrier must remain in

place except when installing modules, or when a qualified installation technician

is wiring for power, relays or analog and network cards.

N O T I C E

Potential Instrument Damage. Delicate internal electronic components

can be damaged by static electricity, resulting in degraded

performance or eventual failure.

The Modbus network card can be configured to support RS232 and

RS485 communications. Terminal block J1 provides the user connection

to the Modbus network card. For more wiring details, refer to Table 1

and to the following steps to install the Modbus network card.

Table 1 Modbus wiring with RS232 or RS485

Connector Connector

block pin

number

Signal Description Function

J1 9 GROUND Signal common RS232

8 Rx Input into the

module

RS232

7 Tx Output from the

module

RS232

6 GROUND OUT Signal common

(Multi-drop network)

RS485

5 B (-) OUT Output from the

module (Multi-drop

network)

RS485

4 A (+) OUT Output from the

module (Multi-drop

network)

RS485

3 GROUND IN Signal common RS485

2 B (-) IN Input into the

module

RS485

1 A (+) IN Input into the

module

RS485

4 English

1 2 3 4 5 6 7 8 9 ... 311 312

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Hach-lange SC 200 Modbus Module User Manual Manual de usuario Pagina 4

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