Weidmuller DPADMA - Universal glavanically isolated signal co Manuel d'utilisateur télécharger pdf (Page 16)

Alarm connections

The DPA has a high inbuilt immunity to noise spikes caused by

switching inductive loads like solenoids or relay coils. However, it

is important to use suppression capacitors across inductive loads

to preserve the relay contacts and to reduce the effect of switching

spikes on nearby circuits.

The alarm outputs are dual SPDT relay contacts with built in

suppression capacitors fitted across the normally open and common

contacts.

DPA/DMA

1 2

2-wir e

Transmitter

+–

Twisted pair cable

Ground cable shield at transmitter end only

DPA/DMA

2 4

DC mA

so urce

+–

Twisted pair cable

Ground ca ble shield at signal source only

Input connection diagrams for mA current inputs.

1 2 ... 11 12 13 14 15 16 17 18 19 20 21 22 23 24

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Weidmuller DPADMA - Universal glavanically isolated signal co Manuel d'utilisateur Page 16