KROHNE TIDALFLUX 2300 F Ex EN - Manual (Page 18)

4
ELECTRICAL CONNECTIONS
18
TIDALFLUX 2300 F
www.krohne.com 6/2013 - 7312442200 - AD EX TIDALFLUX 2300 - en - R02
4.3 Connection of IFC 300 F / PF
The flow sensor and the signal converter must be incorporated in the equipotential bonding
system of the installation. This can be established internally by connection of the protective
earth (PE) conductor of the mains supply system to the internal PE clamp, or externally, by
connecting a separate equipotential bonding conductor between the two external PE-clamps
(size M5). A separate bonding conductor must have a cross-sectional area of at least 4 mm
2
.
The electronics compartment of the IFC 300 F / PF is provided in type of protection “flameproof
enclosure” Ex d. The threaded joints of the cover and the housing have a tight fit due to the
requirements of protection “flameproof enclosure” Ex d. Screw the covers on and off with care
and never use excessive force !
The terminal compartment is in type of protection "increased safety" Ex e. 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 HEX or Allen key no. 2.5
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 before opening.
Figure 4-2: 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,
Type of protection Ex e,
100...230 VAC, +10%/-15%, 22 VA
12...24 VDC, +30%/-10% (short-time: -25%), 12 W
24 VAC, +10%/-15%, 22 VA
24 VDC, +30%/-25%, 12 W
U
m
= 253 V
A, A-, A+
B, B-
C, C-
D, D-
Connections for signal I/Os (PELV circuits),
Type of protection Ex e or Ex ia,
dependent on the specific version of the signal
converter ordered. Consult the tables with CG
numbers for details.