Electrical Connection; Cable Connection Area - ABB LST100 Operating Instructions Manual

3 Electrical connection

Before installation, ensure the LST100 is not plugged in to any
power supply. The LST100 does not support hot plugging for
all interfaces (1 to 5 V output, RS485). Installation engineers
must statically discharge themselves or use a wrist strap
before connecting cables to LST100.
Check the LST100 power supply to ensure that it does
not exceed the permitted range (9 to 16 V DC).
When the terminal cover of the LST100 is open, protect
the inside of the transmitter against the ingress of dust
and moisture.
WARNING – Bodily injury
No support for hot plugging interface
The LST100 does not support hot plugging
for all interfaces (1 to 5 V output, RS485).
Disconnect the LST100 from the power supply
before connecting cables.
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.
– LST100 connections have ESD 4 kV protection
for contact and 8 kV for air in accordance with
IEC 61000-4-ABB strongly recommends using
a wrist strap or to discharge electrostatic charge
before connecting cables to the LST100.

3.1 Cable connection area

The electrical wiring is fitted to the LST100 using a 1/2-14 NPT
cable gland. To ensure the transmitter's NEMA 4X and IP 67
ingress protection rating is maintained, apply a suitable sealing
compound to the cable gland threads before screwing the
gland into the housing (½ in. NPT female thread).
DANGER – Serious damage to health / risk
to life
When installing the LST100 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 tightened.
Moisture damage prevention
– During installation of the single cable, include
a drip loop in the cable and ensure the
cable gland compression fitting is securely
tightened.
LST100 – Ultrasonic level transmitter | OI/LST100-EN 9