The IMX12-CD01-2R-2U-0/L relay coupler

switches intrinsically safe circuits on the field

side and ensures a safe galvanic isolation between the input and output circuits (relay).

Possible applications include, for example,

remote resetting, fire alarm testing or remote

calibration of strain gages. The device is suitable for use in Zone 2. The device also enables the creation of safety-related applications up to and including SIL3 (high and low

demand in accordance with IEC 61508).

The relay coupler is equipped with three relay

outputs (changeover contacts). The input signals are interpreted as low or high signals depending on the input level, and provided as a

corresponding output signal. The inputs are

not polarized. Input E1 and input E2 switch

output A1 and output A2 respectively. Input

E3 controls output A1, output A2 and output

A3 simultaneously. The device is powered

through the input signal (loop-powered).

The switching status of the output is indicated

by three yellow LEDs (Rel…).

If applied in SIL-3 circuits, the following conditions have to be observed:

■ Input E1 and input E2 switch the respective output (A1 or A2) separately.

■ If the output relay triggers a contactor directly: Equip the contactor with protective

circuitry at the coil.

■ Connect both relays in series.

■ Equip the output relay with a fuse that is

activated when 60% of the nominal current

is achieved.

The device is available in a two-channel design for SIL-2 applications.

The device is equipped with removable screw

terminals.

■ The inputs are not polarized

■ With input E1 and input E2, the associated

output switches separately

■ NE load connection: SIL 3 Safety Function

for NE (Normally Energized) load (de-energized in safe state) is available

■ ND load connection: SIL 3 Safety Function

for ND (Normally De-Energized) load (energized in safe state) is available

■ The device is available in a two-channel

design for SIL 2 applications

■ Complete galvanic isolation

■ Input reverse-polarity protected

■ Removable screw terminals

■ ATEX, IECEx, NEPSI, cUL, cFM, INMETRO, KOSHA, TR CU EAC,

■ Installation in zone 2

■ SIL 3