Electrical connections – KROHNE TIDALFLUX 2300 F Ex EN User Manual
Page 17
ELECTRICAL CONNECTIONS
4
17
TIDALFLUX 2300 F
www.krohne.com
6/2013 - 7312442200 - AD EX TIDALFLUX 2300 - en - R02
4.2 Connection of TIDALFLUX 2000
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 TIDALFLUX 2000 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.
Data for connection on all Ex e terminals:
stripping lenght for wires: 8 mm, torque for screws: 0.6 - 0.8 Nm.
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 4-1: 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,
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
C-, D, D-
Connections for RS 485 circuit,
Type of protection Ex ia.