KROHNE OPTISONIC 3400 Ex EN - Manual (Page 20)

4
ELECTRICAL CONNECTIONS
20
OPTISONIC 3400
www.krohne.com 10/2013 - 7312472200 - AD EX OPTISONIC 3400 -en- R02
The exact I/O-configuration for circuits A, B, C and D is order-specific and can be determined by
the CG35 number shown on the I/O sticker inside the terminal compartment. Therefore check
the data on the back of the UFC 400 electronics unit. The CG35 number contains 10 characters
of which the last three characters (XYZ) determine the configuration of the I/O circuits:
For schematic overviews of the CG35 numbers, refer to Non-"Ex i" I/O connections on page 22
and refer to "Ex i" I/O connections on page 24. These overviews do not show all details. The exact
connection diagram of a specific UFC 400 signal converter can be found on the sticker inside the
terminal compartment.
Figure 4-2: Electrical connections
1 Unscrew interlocking head screw
2 Turn cover counterclockwise and remove
3 Open / close safety lid of mains supply section
4 Mains supply & signal / data terminals
Terminals Terminals Terminals Terminals Function, electrical data Function, electrical data Function, electrical data Function, electrical data
L, N
L+, L-
Connections for mains supply, always non-Ex i
100...230 V AC, +10%/-15%, 22 VA
12...24 V DC, +30%/-25%, 12 W
24 V AC, +10%/-15%, 22 VA
24 V DC, +30%/-25%, 12 W
U
m
= 253 V
A, A-, A+
B, B-
C, C-
D, D-
Connections for signal I/Os (PELV circuits), non-“Ex i” or “Ex i”, are dependent on the
specific version of the UFC 400 converter ordered. Consult the tables with CG35
numbers for details.
CG35 CG35 CG35 CG35 **** **** **** X XX X YYYY Z ZZ Z
Pos 1...4 5 6 7 8 9 10
determine I/O circuits