The 1-channel Ex-area temperature measuring amplifier IM34-12EX-RI is designed to

evaluate the temperature-dependent changes

of Ni100/Pt100 RTDs, thermocouples types B,

E, J, K, L, N, R, S and T or low voltages in a

range of -100…+160 mV and to output them

as temperature-linear current signals 0/4…20

mA.

Alternatively, Ni100/Pt100 RTDs in 2, 3 or 4-

wire technology can also be operated at the

input circuit of the measuring amplifier. The

Ni100/Pt100 input can either be used as external cold junction compensation for the thermocouple or as independent measuring input.

The device has an additional relay output to

monitor over or undershoot of a limit value.

The measuring range, limit value and the device functions are set via rotary coding switches or rather slide switches.

The following settings are available:

■ Type of probe

■ Connection of the Ni100/Pt100 resistor in

2, 3 or 4-wire technology

■ Measuring range, start -100…- 1 °C in 1-K

steps, 0…990 °C in 10-K steps

■ Limit value

■ Measuring range, end 0…1990 °C in 10-K

steps

■ Input circuit monitoring for wire-break

■ Behaviour of the current output in case of

errors in the input circuit: 0 or > 22 mA

■ Internal or external cold junction compensation

■ Relay output mode

The signals are transformed according to ITS

90/IEC 584 for thermocouples and according

to IEC 751 for Pt100 RTDs and provided temperature linear at the current output.

■ Input for Pt100/ Ni100 resistors, thermocouples and millivolt signals in 2, 3 or 4-

wire technology

■ Output circuit: 0/4…20 mA, limit value relay

■ Upper and lower limit adjustable via rotary

coding switch

■ Complete galvanic isolation

■ Input reverse-polarity protected

■ ATEX, IECEx, CFMUS, UL, TR CU, INMETRO, CCOE, NEPSI, KOSHA

■ Installation in zone 2