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The following signal types shall be used (preferable):
Analogue input/output : 2 wire, 4 – 20 mA.
Digital input: Potential free contact.
Digital output: 24 VDC.
Signals between control systems and other panels shall be powered from the platform control system.
Position: Proximity switches with the NAMUR interface.
Pneumatic signals: 0.2 – 1.0 barg.
Instrument field bus/digital communication may be used if the concept demonstrates economical
savings and requirements to time response are satisfied.
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