Lumasense-technologies ISR 50-LO Manuel d'utilisateur télécharger pdf (Page 36)

INFRATHERM pyrometer ISR 50-LO

5.2 Pin assignment for the connection terminal inside the converter

Pin connector color *

)

meaning

1 +24 V DC white + 24 V power supply (18 ... 36 V DC)

2 0 V brown 0 V power supply

3 Ia + green + I

outp.

analog output

4 Ia - yellow - I

outp.

analog output

5 Ext pink external clearing of maximum value storage / hold function

6 0 V relay contact ground (AC/DC) for contamination alarm

7 +24 V DC 24 V output for external clearing of maximum value storage

8 Rel relay contact (AC/DC) for contamination alarm

9 RxD / B black RxD (RS232) or B (RS485)

10 TxD / A violet TxD (RS232) or A (RS485)

11 Gnd / S red DGND (Ground for interface)

24 V

0 V

Ext

0 V

24 V

Rel

RxD/B

TxD/A

Gnd/S

)

The color specification refer to the standard assignment of all IMPAC connection cables

5.2.1 Short description

Pin 1+2:

With the connection to the power (18 ... 36 V DC) the instrument operates immediately.

Pin 3+4: The analog output has to be selected according to the signal input of the connected instrument

(digital display, controller, PLC, etc.).

Pin 5+7: External clearing of maximum value storage:

If the clear time of the maximum value storage is set

to “extern”, the pyrometer always records the highest temperature value until this value is cleared

by connecting the pin 7 (24 V) with pin 5. This can be done via an external contact but it is also

possible to simulate the clearing via an own written software.

Hold function:

when the hold function mode is activated the current temperature reading is frozen

as long as pin 7 (24 V) is connected to pin 5.

Pin 8+6: If the pyrometer is used in ratio mode a relay contact for the integrated contamination alarm is

available. It switches at the too low signal level (adjustable) and can be used to activate a warn-

ing signal. The contact is designed for a maximum switch current of 0.5 A and a maximum volt-

age of 60 V AC or DC.

Pin 9-11: Via serial interface and the provided software InfraWin the temperature can be displayed and

stored on a PC, parametrizing can also be done.

5.3 Connecting the pyrometer to a PC

The pyrom

eters are equipped with a serial interface RS232 or RS485 (switchable at the pyrometer). Stan-

dard on a PC is the RS232 interface. At this interface one pyrometer can be connected if the interface is set

to RS232. Only short distances can be transmitted with RS232 and electromagnetic interferences can affect

the transmission. With RS485 the transmission is to a large extend free of problems, long transmission dis-

tances can be realized and several pyrometers can be connected in a bus system.

If RS485 is not available at the PC, it can be realized with an external converter which converts the RS485 in

RS232 for a standard connection to a PC. When using a converter RS485 Ù RS232 take care, that the

converter is fast enough to receive the pyrometer’s answer to an instruction of the master. Most of the com-

monly used converters are too slow for fast measuring equipment. So it is recommended to use the IMPAC-

converter (order no. 3 852 430).

With a slow RS485 connection it is also possible to set a wait time at the pyrometer which delay the re-

sponse of a command to the pyrometer (see 9.10 Wai

t time).

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Lumasense-technologies ISR 50-LO Manuel d'utilisateur Page 36

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