Switch Amplifier

HiC2821

Function

This isolated barrier is used for intrinsic safety applications. It transfers digital signals (NAMUR sensors/mechanical contacts) from a hazardous

area to a safe area.

The proximity sensor or switch controls the normally open relay output for the safe area load. The device output changes the state when the input

signal changes the state. The mode of operation can be reversed with switch S1 of the device.

One additional relay is available for the fault output. Line fault detection (LFD) can be selected or disabled via switch S2.

During an error condition, the relay reverts to its de-energized state and the LEDs indicate the fault. A separate output bus is available. The fault

conditions can be monitored via a Fault Indication Board.

This module mounts on a HiC Termination Board.

Connection

Zone 2

Div. 2

Zone 0, 1, 2

Div. 1, 2

HiC2821

Termination Board

I

II

10 kΩ

1.5 kΩ

10a

9a

SL1

8a

7a

12

15

11

14

24 V DC

FAULT

1a, 1b

2a, 2b

6b

5a

5b

1

4

-

+

+

-

SL2

1

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Pepperl+Fuchs Group

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