Digital field display
5 Electrical connection
11
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.
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
In and
output
1
Measured signal (+) 4 to 20 mA
Signal input
2
Terminal for further instrumentation (link
with terminal 4)
Terminal
3
Measured signal (-) 4 to 20 mA
Signal input
4
Terminal for further instrumentation (link
with terminal 2)
Terminal
ba111ren.fm Page 11 Friday, February 22, 2008 11:15 AM
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