BERTHOLD TECHNOLOGIES LB 480, User Manual

Page: 223 / 450

SENSseries LB 480 Level measurement
BERTHOLD TECHNOLOGIES GmbH & Co. KG
2 – 223
Volume 2 3 Electrical Installation
2
3.3
Connecting the Detector
If lines are already connected to the detector, keep in mind:
Explosion hazard!
As long as the detector is supplied with power, do not open the ter-
minal compartment cover if there is a potentially explosive atmo-
sphere.
Risk of fatal injury due to electric shock!
If the terminal compartment cover is open, you are at risk of getting
an electric shock when you touch the terminals. Do not connect or
disconnect any wires as long as the device is supplied with line volt-
age.
Depending on the type of detector, the detector is supplied with
110/230 V
AC
or 24 V
DC
. With the version with 110/230 V
AC
and
with the line voltage switched, please pay attention to adequate
protection against accidental contact.
Always follow the safety instructions for "Electrical Installation" on
page 2-217 and if applicable for Explosion Protection on page 1-23 .
IMPORTANT
Open the terminal compartment only in dry ambient conditions,
never in the rain.
Moisture in the terminal compartment can both cause a short cir-
cuit with other lines or cancel the explosion protection.
Hereinafter, it is assumed that no cables have been connected yet.
Otherwise, make sure that the detector is not live.
As the intensity of electromagnetic interference on the cables is
very different in the systems, we recommend using a shielded
cable. Signal cables must not be laid parallel to power lines. This is
especially important for master lines and lines with high current
load: Keep a minimum distance of 50 cm.
Cable shields can be placed on the terminals marked with PE. If EMC
cable glands are used, the shield must be placed directly in the
cable gland. Screened cables must be connected at one end to the
detector. Even with a multi-detector application, put on the shield
of the RS-485 connection cable on one side only.
For the following activities, use the checklists in chapter 5.8.1 on
page 1-51 and chapter 5.8.2 on page 1-53 to document the accu-
racy and completeness of your work.
For detectors that are used in hazardous areas, the detector hous-
ing (
Fig. 3-4 ) and thus the pressure-proof enclosure of the elec-
tronics may be opened only by the BERTHOLD TECHNOLOGIES ser-
vice or by persons authorized by BERTHOLD TECHNOLOGIES.