Hans Turck GmbH & Co.KG ñ D-45472 Mülheim an der Ruhr ñ Witzlebenstraße 7 ñ Tel. 0208 4952-0 ñ Fax 0208 4952-264 ñ more@turck.com ñ www.turck.com1 / 4

Isolating switching amplifier

2-channel

IM1-231EX-R

The 2-channel IM1-231EX-R isolating switch-

ing amplifier is equipped with intrinsically safe

input circuits.

Sensors according to EN 60947-5-6 (NAMUR)

or potential-free contact transmitters can be

connected to the device.

The output circuits each feature a relay with

a changeover contact. In addition, the device

features a common alarm output.

Via four switches on the front, the output

mode (work or quiescent current behavior, i.e.

NO/NC) can be switched on and off separate-

ly for each channel as well as wire-break (WB)

and short-circuit monitoring (SC).

When using mechanical contacts, wire-break

and short-circuit monitoring must be switched

off or the contacts must be wired to resistors

(II) (see circuit diagram).

The Pwr LED lights green to indicate opera-

tional readiness. The 2-color LED 1 lights yel-

low to indicate the switching status of the out-

put. In the event of an input circuit error, the 2-

color LED turns red, with the input circuit mon-

itoring switched on. Thereupon the output and

the alarm relay drop out.

■ 2 relay outputs (changeover)

■ Output mode adjustable (NO/NC mode)

■ Input circuits monitored for wire-break/

short-circuit (ON/OFF switchable)

■ Common alarm output

■ Complete galvanic isolation

■ Input reverse-polarity protected

■ ATEX, IECEx, TR CU, INMETRO, NEPSI

■ Installation in zone 2