16
L ST 3 0 0 |
CO M PAC T U LT R A S O N I C L E V EL T R A N SM I T T ER | L S T 3 0 0 – EN R E V. E
4 Electrical connections
Before installation, ensure the LST300 is not plugged in to any
power supply .
Installation engineers must statically discharge themselves or
use a wrist strap before connecting cables to LST300 .
Check the LST300 power supply to ensure that it does not
exceed the permitted range (12 to 42 V DC) .
When the terminal cover of the LST300 is open, protect the
inside of the transmitter against the ingress of dust and
moisture .
WARNING – BODY INJURY
Not recommend for hot plugging power
The LST300 does not recommend hot plugging power (4 to
20 mA with HART) .
Shut down the power supply before connecting the LST300
to the power supply .
Le LST300 ne recommande pas la puissance chaude de
bouchage (4 - 20 mA avec Hart) .
Arrêtez l’alimentation avant de connecter le LST300 à
l’alimentation
NOTICE – PROPERTY DAMAGE
Material damage due to electrostatic discharge
An open cover does not provide contact protection .
Touching conductive components can damage electronic
components (in some cases beyond repair) due to
electrostatic discharge . Do not touch conductive
components .
LST300 connections have ESD 4 kV protection for contact
and 8 kV for air in accordance with IEC 61000-4-2 . ABB
strongly recommends using a wrist strap or to discharge
electrostatic charge before connecting cables to the
LST300 .
Cable connection area
The electrical wiring is fitted to the LST300 using a 1/2-14 NPT
or a M20 x 1 .5 cable gland . To ensure the transmitter’s NEMA 4X
and IP 66/67 ingress protection rating is maintained, apply a
suitable sealing compound to the cable gland threads before
screwing the gland into the housing (1/2 in . NPT or M20 x 1 .5
female thread) .
DANGER – SERIOUS DAMAGE TO
HEALTH / RISK TO LIFE
When installing the LST300 measuring system in hazardous
areas, all national standards and the specifications in the
safety instructions must be complied with and the specified
cable gland must be used .
NOTICE – PROPERTY DAMAGE
•
Do not screw the terminal cover on with the cable gland
tightened .
•
Route a single cable only through the cable gland .
Multiple cables will compromise the transmitter’s
ingress protection .
•
After connecting the terminals, ensure the terminal
cover is tightenedd .
IMPORTANT (NOTE)
The red plugs must be removed when the transmitter is
installed in a hazardous area . They are not explosion-proof
certified products .
Figure 18 Cable connection area
Summary of Contents for LST300 Series
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