KROHNE ALTOSONIC III EN - Manual (Page 30)

ALTOSONIC III 30
6. Electrical
installation
6.1 General The field cables enter the terminal compartment of the UFC III…-EEx flow converter unit (i.e. power supply, current and
signal in-/outputs) and are non-intrinsically safe.
To connect external devices to the in-/output terminals, the wiring requirements for the type of protection of the
compartment (standard: increased safety "e", optional: flameproof "d") must be conform to the international or national
standard involved (e.g. DIN VDE 0165, paragraph 5.6).
To connect external devices to the in-/output terminals, the wiring requirements for the specific type of protection of the
terminal compartment (standard: increased safety "e", optional: flameproof enclosure "d") must be respected, see
standard EN 60079-14 or the corresponding national standard.
The non-intrinsically safe terminals for connection of the power supply (L, 1L≈ and N, 0L≈) must be connected in
accordance with the relevant standard code of practice for electrical apparatus intended for use in potentially hazardous
locations, type of protection increased safety "e" or type of protection flameproof enclosure "d", depending on the type
of protection of the terminal compartment of the flow converter housing.
6.2 Connecting cables Cable A
Signal cable for current output and binary in-/outputs (pulse and status output). This cable
type must be in accordance with clause 9 of the EN 60079-14 "Electrical installations in
hazardous locations" or an equivalent national standard (e.g. DIN VDE 0165 Part 1).
Cable B Mains power supply cable. This cable type must also be in accordance with clause 9 of the
EN 60079-14 "Electrical installations in hazardous locations" or an equivalent national
standard (e.g. DIN VDE 0165).
Rated voltage: 500 V
Examples: H07..-., H05..-. to HD 21.S2 or HD22.S2
Cable C MR06 coaxial cable (only for remote default version), to be supplied by KROHNE.
Technical data:
Test voltage: 500 V
Diameter of strand (core and screen): 0.1 mm
Distributed capacitance (core/screen): 67 pF/m
Distributed inductance (core/screen): 0.4 µH/m
Equipotential bonding
conductor Minimum cross-sectional area;
unprotected: 4 mm
2 (11 AWG)
protected by metal conduit: 2.5 mm 2 (14 AWG).
6.3 Connection diagrams The following diagrams show the connection diagrams of respectively the compact ultrasonic flowmeter system and
remote ultrasonic flowmeter system (default).