KROHNE OPTISONIC 3400 Ex EN - Manual (Page 9)

INTRODUCTION
1
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OPTISONIC 3400
www.krohne.com 10/2013 - 7312472200 - AD EX OPTISONIC 3400 -en- R02
1.6 UFC 400 F(/i)-Ex
The UFC 400 F(/i)-Ex is the remote (field) configuration of the ultrasonic signal converter and has
intrinsically safe (Ex ia) connections to the ultrasonic flow sensor in remote design. The
ultrasonic signal converter is either provided with increased safety (Ex e) or intrinsically safe (Ex
ia) signal in-/outputs indicated by an "i" in the type name as UFC 400 F/i-Ex The in-/outputs and
mains supply connections are located in the terminal compartment, which can either be
configured as “Ex e” (default) or “Ex d” (optional).
The explosion safety marking is as follows:
UFC 400 F-Ex;
UFC 400 F/i-Ex;
The intrinsically safe transducer output connections have the following values:
“ Ex d Ex d Ex d Ex d” terminal compartment terminal compartment terminal compartment terminal compartment “ Ex e Ex e Ex e Ex e” terminal compartment terminal compartment terminal compartment terminal compartment
II 2 G Ex d [ia] IIC T6 Gb II 2 G Ex d e [ia] IIC T6 Gb
“ Ex d Ex d Ex d Ex d” terminal compartment terminal compartment terminal compartment terminal compartment “ Ex e Ex e Ex e Ex e” terminal compartment terminal compartment terminal compartment terminal compartment
II 2(1) G Ex d [ia] [ia Ga] IIC T6 Gb II 2(1) G Ex d e [ia] [ia Ga] IIC T6 Gb
U
o
= 8,2 V I
o
= 210 mA P
o
= 435 mW C
o
= 1,3 μF or 0,8 μF L
o
= 0,5 mH or 1,2 mH