Balluff BMD 1H Series, User Manual

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12 ÏÏÏƖº¹ÄÄÍŰƖ»ÇÅ
4 Mounting
54455-EN-170712
4 Mounting
4.1 General instructions
Protect your instrument against moisture ingress through the following
measures:
•
Use the recommended cable (see chapter " Connecting to power
supply ")
•
Tighten the cable gland
•
À½ÆÅÇÍÆÌÁÆ¿ÀÇÊÁÒÇÆ̹ÄÄÑƓÌÍÊÆÌÀ½ÀÇÍËÁÆ¿ËÇÌÀ¹ÌÌÀ½»¹ºÄ½
gland points downward
•
Loop the connection cable downward in front of the cable gland
This applies mainly to outdoor installations, in areas where high
humidity is expected (e.g. through cleaning processes) and on cooled
or heated vessels.
To maintain the housing protection, make sure that the housing lid is
closed during operation and locked, if necessary.
¹Ã½ËÍʽÌÀ¹ÌÌÀ½¼½¿Ê½½Ç¾»ÇÆ̹ÅÁƹÌÁÇÆËȽ»ÁŲ½¼ÁÆ»À¹È̽Ê
" Technical data " meets the existing ambient conditions.
Metric threads
In the case of instrument housings with metric thread, the cable
glands are screwed in at the factory. They are sealed with plastic
plugs as transport protection.
You have to remove these plugs before electrical connection.
NPT thread
In the case of instrument housings with self-sealing NPT threads, it is
not possible to have the cable entries screwed in at the factory. The
free openings for the cable glands are therefore covered with red dust
protection caps as transport protection. The dust protection caps do
ÆÇÌÈÊÇÎÁ¼½ËÍű»Á½ÆÌÈÊÇ̽»ÌÁÇƹ¿¹ÁÆËÌÅÇÁËÌÍʽƖ
Prior to setup you have to replace these protective caps with ap-
proved cable glands or close the openings with suitable blind plugs.
Make sure before mounting that all parts of the instrument exposed to
the process are suitable for the existing process conditions.
These are mainly:
•
Active measuring component
•
ÊÇ»½ËËŲÌÌÁÆ¿
•
Process seal
Process conditions in particular are:
•
Process pressure
•
Process temperature
•
Chemical properties of the medium
•
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ÇÍ»¹ÆŲƼ¼½Ì¹ÁĽ¼ÁƾÇÊŹÌÁÇÆÇÆÌÀ½ÈÊÇ»½ËË»ÇƼÁÌÁÇÆËÁÆ»À¹È̽Ê
" Technical data " as well as on the type label.
Protection against mois-
ture
Cable glands
Suitability for the process
conditions