ABB LLT100 Operating Instructions Manual Download

Page: 6 / 68

User Guide

| OI-LLT100-EN Rev. D

LLT100

Laser level transmitter

1.2 Personnel

WARNiNG

Only qualified and authorized specialists should be
charged with the installation, electrical connection,
commissioning, operation, and maintenance of LLT100
instruments.
These specialists must hold the necessary
qualifications, such as training or instruction,
to operate and maintain devices or systems in
accordance with safety engineering standards
regarding electrical circuits, high pressures, aggressive
media, and adequate safety systems, based on local
national standards such as NEC for USA, National
Building Code, etc.
Since the LLT100 may form part of a safety chain, we
recommend replacing the device immediately if any
defects are detected.
Only use non sparking tools when installing the
instrument in hazardous areas.

WARNiNG

The device can be operated at high levels of pressure
and with aggressive media. As a result, serious injury
or significant property damage may occur if this device
is operated incorrectly.
Any process media released may cause severe injuries.
Depressurize the pipeline/tank before opening the
LLT100 connection.
Provide adequate protection and training against
chemicals involved in the work environment.
Carefully plan any installation, modification, or repair
before actually proceeding.

1.3 Electrical

Electrical connections may only be established by authorized
specialist personnel in accordance with the electrical circuit
diagrams. The electrical connection information in the manual
must be observed; otherwise, the applicable protection
type may be affected. Ground the instrument according to
requirements.
In addition, you must observe the relevant safety regulations
regarding the installation and operation of electrical systems,
and the relevant standards, regulations and guidelines about
explosion protection.

WARNiNG

Avoid contact with leads and terminals. Electrical
shock could result in death or serious injuries.
Do NOT make electrical connections unless the
electrical code designation stamped on the LLT100
data plate matches the classification of the area in
which you want to install the LLT100. Failure to comply
with this warning can result in fire or explosion.
Use only tools compliant with national insulation
standards, like DIN EN 60900.
Only use non sparking tools when installing the
instrument in hazardous areas.
During installation, completely power down the
4–20 mA loop for at least 60 seconds, as otherwise it
may cause a permanent error.

Figure 1

External protective earth (PE) terminal

1.3.1 Surge protector-equipped terminal block

To ensure proper functioning, ground connection is mandatory
for surge protector-equipped instruments.

CAutioN

Test voltage withstand capability can no longer be
ensured when this protective circuit is used.

1.3.2 Common mode voltages

The LLT100 with surge protection will not work if exposed to
common mode voltage in excess of the maximum allowed
supply voltage.

WARNiNG

iGh

oltAGE

Ensure that the equipment or any device or power cord
connected to the LLT100 is properly grounded.