Weidmüller DPA/MAS, Operating Instructions Manual

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Electricalconnectionslabel
The DPA Series of instruments are often customised specifically for
your application. Check the label on top of the case for the correct
connections.
Alarmconnections
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.
Cablepreparationandinstallation
For effective protection from electromagnetic noise, all signal cables
must be shielded, or located on conductive trays or in conduits.
Use 1-8 AWG Cu Wire rated for temperatures above 0 °C Only,
tighten to 4. lb-In. Strip wires to mm from the ends. Use a suitable
ferrule for multistranded wires (do not solder).
InputSignalCabling
Use suitable twisted pair cable for the input signal connection.