Installation, Operation and Maintenance Manual
MAN712 Rev. 9
June 2021
Device Description
Section 4: Device Description
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Section 4: Device Description
General Description
The Line Break Detection System type ELBS-20 is an electronic equipment, developed by
Biffi, for monitoring the pipeline integrity. The ELBS-20 measures, with a settable time
interval, the pressure in the line, it can store the pipeline data (pressure trend) and in case
of failure it can send a command to the actuator to stroke the line valve to the fail-safe
position (Safety Action).
The ELBS-20 was especially engineered for “ON FIELD” service; it means capability of
working in the severest ambient conditions, as wide operating temperature range,
vibrations, explosive atmosphere, etc.
Configuration-Managing Interfaces
The ELBS-20 is provided with a powerful local operator interface, made of one 128x64
graphical OLED display and 3 push-buttons that allow entering the configuration data and
visualizing the values of variables or the status of the device.
Moreover an RS232, an RS485 and a Bluetooth serial communication ports are provided
for the connection with the “Biffi Assistant” software tool (see [1] for details), to carry out
parameter configuration, or variables visualization or to download the recorded event data
for further analysis of pipeline behavior.
Power Supply
The ELBS-20 accepts two different sources of power supplies:
•
External Power Supply from 19.2 V DC to 57.6 V DC (24 V DC -20% to 48 V DC
to +20%).
•
Battery Pack power supply: 7.2 V DC (lithium batteries).
The two power supplies can be applied one or both per time.
When both the power supplies are present, the Battery Pack works as back-up of the
External Power Supply.
The ELBS-20 monitors the status of the External Power Supply and the status of the Battery
Pack Power Supply.
Battery Packs
The Battery Pack Card of the ELBS-20 provides two independent battery packs
(Default and Auxiliary) with dedicated protection circuit (diodes and fuses).
Each battery pack is composed by four Li-SOCl2 size D cells (parallel of two cells in series).
Analog Inputs (Pressure and Position Sensors)
The ELBS-20 is provided with two (Pressure and Position) configurable
(0 - 20 mA or 4 - 20 mA) analog inputs (AI). The ELBS-20 supplies a 14.5 V DC voltage to
the sensors.
Digital Inputs (Opto-isolated)
The ELBS-20 is provided with three configurable opto-isolated Digital Inputs (DI).
