Electrical Connection; Connections; Terminal Layout - Endress+Hauser RIA261 Betriebsanleitung

Digital field display
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5

Electrical connection

Attention: If connecting the unit in an explosion hazardous area, please
take note of the notes and connection diagrams in the Ex-specific docu-
mentation in this manual.

5.1 Connections

5.1.1 Terminal layout

The terminals for the 4 to 20 mA circuit are found under the housing lid
on the upper right side of the unit. The terminal block is a plug-in ver-
sion and can be removed from the connection strip when wiring up the
unit.
1 Measured signal (+) 4 to 20 mA
2 Terminal for further instrumentation (link
with terminal 4)
3 Measured signal (-) 4 to 20 mA
4 Terminal for further instrumentation (link
with terminal 2)
5.1.2 Electrical connection
Both the terminal layout and the connection values of the field mounted
display conform to the Ex requirements.
The unit is only meant for use in a 4 to 20 mA current loop circuit.
Potential equilibrium must be guaranteed on the current loop (inside
and outside the hazardous area). In order to achieve this use the eart-
hing (ground) lug on the lower left area of the housing.
The electronic component can be hinged forwards for simple installation
and easy cable laying.
The unit must only be powered by a power supply that operates using
an IEC 61010-1 compliant energy limited circuit, "SELV or Class 2 cir-
cuit".
Terminal layout
5 Electrical connection
In and
output
Signal input
Terminal
Signal input
Terminal
35