SM-6, SM-6-V, S-SM 3-1
3 Transport and storage
The product should only be transported inside the original
packaging or a suitable alternative.
When not in use, the equipment must be protected from
moisture and heat. They must be stored in a covered, dry and
dust-free room at a temperature between -10 °C and 40 °C.
4 Installation and connection
The flow meters are equipped with the following threads:
Flow meter
Thread
SM-6 / SM-6-V
G 1/4
S-SM 3-1
NPT 1/4”
The drawings for mounting are attached in the data sheet on
the CD. The fittings have to be inserted with Teflon band,
paste or sealing ring!
4.1 Electrical connections (intrinsically safe)
WARNING
Hazardous electrical voltage
The device must be installed by trained staff only.
CAUTION
Wrong mains voltage
Wrong mains voltage may damage the device.
Regard the correct mains voltage as given on the type plate.
CAUTION
Explosion hazard due to prohibited electrical connec-
tion data
Prohibited electrical connection data can cause an explosive
gas mixture to ignite.
In areas with explosive gas atmospheres, this device may only
be operated with an intrinsically-safe power supply. The
power supply must be suitable for the respective zone. The
limits specified in these operating instructions must be ob-
served and must not be exceeded, even with two separate in-
trinsically-safe power supplies.
Ensure the limits will not be exceeded, even in the event of a
fault, e.g. accidental series or parallel connection.
Please observe the relevant safety requirements, e.g. IEC/EN
60079-11 and IEC/EN 60079-14, when installing and operating
intrinsically-safe equipment.
4.1.1 Installing the limit switch with bracket (only model
SM-6/SM-6-V)
DANGER
Explosion hazard
Application in explosive atmosphere
Only use certificated flow sensors.
The limit switch is preinstalled.
• Prior to first use, loosen the plastic countersunk screws
from the mounting plate and position the limit switch at
the desired height.
• The Plastic countersunk screws must be fastened again.
• Connect the cable to the power supply.
Using the limit switch in Ex areas:
Please note the wiring parameters specified in the certificate
PTB99ATEX2128X in chapter Attached documents. We recom-
mend a variety of switch amplifiers, see chapter Technical
Data.
4.1.2 Installing and connecting the switch amplifier
(only model SM-6/SM-6-V)
The switch amplifier is preinstalled.
Please note the wiring parameters specified in the certificates
PTB00ATEX2080 and PTB00ATEX2081 and the installation
notes in the included operating manuals, chapter Attached
documents.
Wiring diagrams
KFD2-SR2-Ex1.W
KFA5-SR2-Ex1.W
KFA6-SR2-Ex1.W
KCD2-E3
6
Bühler Technologies GmbH
BX400001 ◦ 12/2019
