KROHNE OPTISONIC 7060 EN - Manual (Page 24)

OPTISONIC 7060
Electrical & mechanical installation manual 730962.31.00 page 24 of 52
3.4 Electrical Installation
3.4.1 General information
Pre-requisites
Wiring work (laying and connecting the power supply and signal cables) as a part of installing
the gas flow meter is not included in the scope of delivery. The mechanical installation
described in Section 3.3 must be completed. Comply with the minimum requirements of the
cable specs in accordance with Section 3.4.2.
Notes on cable laying
• Cables shall be laid in conduits or on cable trays to provide protection from mechanical
damage.
• Observe the permitted bending radiuses (generally, min. six times the cable diameter for
multi-lead cables).
• Connections outside of conduits shall be as short as possible.
Warning
• Always observe the general safety regulations and safety instructions given in Section 1
when carrying out any installation work.
• Installation work shall only be carried out by trained staff and in accordance with the
relevant regulations issued by the operating company.
• Take appropriate measures to avoid potential local or plant-specific dangers.
3.4.2 Cable specs
Power supply 12 … 24 V DC
Specification Notes
Type of cable Tow leads Connect shielding (if present) to
ground terminal
Min./ max. cross-
sectional area 0.5 mm² / 1.5 mm²
Maximum cable length Depending on loop resistance; min.
input voltage at the OPTISONIC 7060:
12 V Peak current 150 mA
Cable diameter 6 ... 12 mm Fixing range of the cable glands
Digital output / current output
Specification Notes
Type of cable Twisted pair, shielded Connect shielding at other end to
ground terminal
Min./ max. cross-
sectional area 2 / 0.5 mm² Do not connect unused lead pairs
and prevent them form accidental
short-circuit.
Maximum cable length Loop resistance under load ≤ 250 Ω
Cable diameter 6 ... 12 mm Fixing range of the cable glands
WARNING