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Isolating switching amplifier

4-channel

IM1-451EX-R

The 4-channel IM1-451EX-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

an NO contact. In addition, the device features

a common alarm output.

Via eight 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.

■ 5 relay outputs (NO)

■ 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, UL,

C

FM

US

, CSA, TR CU, IN-

METRO, TIIS, NEPSI

■ Installation in zone 2