Lumasense-technologies IS 320 Bedienungsanleitung PDF herunterladen (Seite 12)

IS 320 • IGA 320 Manual General  12

Connecting to the RS485 Interface/Baudrate

The pyrometer is operated in half-

duplex mode. To prevent reflections

due to long stubs, A1 and A2, as

well as B1 and B2, are bridged in

the 8-pin round connector of the

connecting cable. This also

safeguards against the interruption

of the RS485 bus system should a

connecting plug be pulled out. The

master labels mark the connections

on the RS485 converter.

The transmission rate of the serial

interface in Baud (Bd) is dependent

on the length of the cable. Values

between 1200 and 38400 Bd may be

set using the InfraWin software (see Chapter 5) or the command “br” when using other

communication software (see the command table in Chapter 8, Data Format UPP). The baud rate

is reduced by 50% when the transmission distance is doubled. Typical cable length for 19200 Bd is

2 km.

3.1.3 Wait Time t

In the case of a slow RS485 connection, it is possible that the connection will not be fast enough

to receive the pyrometer’s answer to an instruction of the master. In this case, a wait time

(between 00 and 99 bit) can be set to slow down the data transfer (e.g.: t

= 02 at a baud rate

9600 means a wait time of

9600

sec).

3.1.4 Connection of Additional Analyzing Devices

Additional analyzing instruments, such as an LED digital display instrument, only need to be

connected to a power supply and the analog outputs from the pyrometer. Other instruments,

such as a controller or printer, can be connected to the display in series as shown below (total

load of resistance max. 500 Ohm).

3.2 Mechanical Installation

3.2.1 Sighting LED Targeting Light

The pyrometer is equipped with a red LED targeting light to facilitate

positioning with the object to be measured. At the optimal distance, this light

shows its smallest diameter and a sharp image. At other distances the point

yellow

LED digital display

Controller

Power supply

green

brown

white

230V ~

24 V DC

°C

Writer

Master

Pyrometer 1

e.g. address 00

Pyrometer 2

e.g

address

Pyrometer 32

e.g. address 31

GRND

LED point

focus

Reflector

shadow

Terminator

120 Ohm

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