KROHNE OPTISONIC 6300 EEx EN - Manual (Page 16)

4
ELECTRICAL CONNECTIONS
16
OPTISONIC 6300
www.krohne.com 03/2010 - 7309972300 - EX OPTISONIC 6300 R03 en
4.1 General
The display cover seals the electronics compartment of the converter housing and provides type
of protection “flameproof enclosure”. The terminal compartment is default in type of protection
“
increased safety” ("Ex e") and can optionally be performed as flameproof enclosure ("Ex d"). The
threaded joints formed by the covers and housing are a tight fit due to the requirements for type
of protection “flameproof enclosure”. Screw the covers on and off with care and never use
excessive force !
Keep the screw-threads free of dirt and well-greased (e.g. with PTFE grease). The grease will
help to prevent the threads from locking due to corrosion.
To unscrew the covers, first release the interlocking devices (one at each cover). Therefore
unscrew the M4 head screw with internal hexagon socket set using a No. 3 Allen key until the
interlocking device can be turned. After the covers are screwed back onto the housing, make
sure that the interlocking devices are properly refitted.
WARNING!
Allow the electronics to de-energize before opening the electronics compartment of the flow
converter housing. Wait at least 35 minutes for T6 and 10 minutes for T5 before opening.
Figure 4-1: Electrical connections
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, 50/60 Hz
12...24 V DC, +30%/-10%, 12W
24 V AC, +10%/-15%, 22 VA, 50/60 Hz
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 300 converter ordered. Consult the tables
with CG34 numbers for details.