Weidmuller DPAMAS - Universal glavanically isolated signal co Manual do Utilizador descarregar pdf (Página 16)

DPA/MAS

•

Operation

General

The DPA/MAS allows you to monitor the difference between two

-20 mA signals. Trip points are set on the value of signal A minus the

value of Signal B.

Input signal isolation

Both input signals must be able to share a common return. If this is

not possible then one of the signals will need to be floated by passing

it through a signal isolator. Both signals must be in the same format

(

normally 4-20 mA).

DPA/MAS block diagram.

mA Current A

A - B

mA Current B

Alarm 1

Power

Supply

Alarm 2

24 V DC (Out)

1 2 ... 11 12 13 14 15 16 17 18 19 20 21 ... 27 28

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