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8027872/1JTM/0-8/2023-05| SICK O P E R A T I N G I N S T R U C TI O N S | FLOWSIC550
Subject to change without notice
ELECTRICAL INSTALLATION 7
7 Electrical installation
7.1 Safety
All assembly work previously described must be completed (as far as applicable) before-
starting installation work.
Requirements for use in potentially explosive atmospheres
The FLOWSIC550 is designed for use in potentially explosive atmospheres according to the
respective device version, see “Technical data”, page 42
Special conditions for use:
1 Information on power supply / battery combination limitations, see see “Electrical con-
nections”, page 25.
2 The equipment pressure sensor and ultrasonic transducers that are mounted in the
meter body contain piezo-electric devices. The equipment installation shall ensure that
these devices are suitably protected from impact.
3 The ultrasonic transducers that are mounted in the meter body are manufactured from
titanium. The equipment installation shall ensure that these devices are suitably pro-
tected from impact or friction.
4 The adhesive labels that are fitted to the flow meter may generate an ignition-capable
level of electrostatic discharge under certain conditions. The user shall ensure that the
equipment is not installed in a location where it may be subjected to external conditions
which might cause a build-up of electrostatic charges on these non-conducting surfaces.
Additionally, cleaning of the equipment should be done only with a damp cloth.
5 The flow meter is considered not capable of passing a 500V r.m.s. a.c. dielectric strength
test according to Clause 6.3.13 of IEC 60079-11:2011, CAN/CSA-C22.2 No. 60079-
11:14, ANSI/UL 60079-11 6th Edition between the intrinsically safe circuits that are
associated with the Ext. Power and the Service / Bluetooth M12 Connector connections,
and its enclosure. This shall be taken into account in any equipment installation. The cir-
cuits associated with external connections RS485-1, RS485-2, DO0, DO1 and DO2 are
isolated from the equipment enclosure, and are considered capable of passing a 500V
r.m.s. a.c. dielectric strength test according to Clause 6.3.13 of IEC 60079-11:2011,
CAN/CSA-C22.2 No. 60079-11:14, ANSI/UL 60079-11 6th Edition.
6 The flow meter is considered not capable of passing a 500V r.m.s. a.c. dielectric strength
test according to Clause 6.3.13 of IEC 60079-11:2011, CAN/CSA-C22.2 No. 60079-
11:14, ANSI/UL 60079-11 6th Edition between the intrinsically safe circuits that are
associated with the M8 connectors to which the pressure and/or temperature transmit-
ters are connected, and its enclosure. This shall be taken into account in any equipment
installation. When considering this cognisance shall also be taken of Condition 7b).
7 Conditions associated with the digital temperature transmitter type EDT 87:
a) The capacity of free metal parts is C=24pF. This must be taken into account during
installing the equipment.
WARNING: Electrical hazard
Incorrect cabling can cause device malfunctions, failure of the measurement
system or serious injuries.
▸ Observe the relevant safety regulations as well as the safety notices in during all
installation work, see “For your safety”, page 8.
▸ Take suitable protection measures against possible local hazards or hazards arising
from the equipment.
▸ All work may only be carried out when the device is disconnected from the power
supply.
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