Wiring; Connecting The Process Display Unit - Endress+Hauser Ria45 Bedienungsanleitung

Wiring

4 Wiring
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Warning!
Make sure that no voltage is supplied when wiring the device.
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Caution!
• The protective ground connection must be established before any other connection is made.
A source of danger could arise if the protective ground connection is disconnected.
• Prior to commissioning, make sure the supply voltage matches the specifications on the
nameplate (left side of the housing).
• It is not permitted to connect a mixture of safety extra low voltage and voltage which poses a
shock hazard to the relays.
• Provide a suitable switch or power-circuit breaker in the building installation. This switch
must be provided within easy reach of the device and be labeled as a disconnector.
• An overcurrent protection unit (nominal current = 10 A) is required for the power cable.
!
Note!
Observe the terminal designation on the rear of the device.
4.1

Connecting the process display unit

A transmitter power supply system (LPS) is provided for every input. The transmitter power
supply system is primarily provided to supply power to 2-wire sensors and is galvanically isolated
from the system and the outputs.
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RIA45
Endress+Hauser