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According to IEC 61000-4-2，the contact ESD
protection voltage of LST300 connectors is 4 kV
while the air ESD protection voltage is 8 kV. ABB
strongly recommends using wristbands or
electrostatic discharge before connecting cables
to LST300。
Cable connection area
The wire is mounted on LST300 with a 1/2-14 NPT
or M20 x 1.5 cable sealing sleeve. In order to
maintain the NEMA 4X and IP 66/67 of the
transmitter in the protection level, proper sealant
(1/2in. NPT or M20 x 1.5 nut thread) should be
coated on the thread of the cable sealing sleeve
before the sealing sleeve is screwed into the outer
covering.
When installing LST300
measurement system in
dangerous area, all national
Danger
standards and specifications
-
in installation instructions
Serious
Damage to
must be met, and specified
Health/Life
cable sealing sleeve must be
used.
Do not tighten the end
-
cap when the cable seal
sleeve is tightened.
Only a single cable is worn
-
in the cable sealing sleeve.
Wearing multiple cables
Attention
-
will affect the entry
Property
protection performance of
Loss
the transmitter.
After terminal connection,
-
make sure that the
terminal cover is
tightened.
Before installing the
transmitter in dangerous area,
Attention
the red plug must be
-
Important
removed. The product has not
Matters
passed the explosion-proof
certification.
Figure 2. Terminals Introduction
a Positive pole of power supply (+)
b Negative pole of power supply (+)
c Expansion table, short connection with negative pole in
normal use (Ext)
DC power supply
As shown in Fig. 1, the LST300 is operated by a
DC power supply connected to the terminal.
First open the blind cover to connect the
-
cable.
Power supply voltage is 12 - 42 V DC, no
-
surge protection. Power supply voltage is
12 - 42 V DC when the terminal of
negative pole and expansion meter is
short connected, surge protection.
To better prevent electromagnetic
-
interference, twisted pair cable is
recommended.
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