LEGRAND EMS CX3, Техническое руководство, Страница: 18 / 98

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WIRING (CONTINUED)
■ Voltage measurement:
The voltage is measured in the same way
as on all measurement module catalogue
numbers.
To protect the measurement
control units, refer to the
information in the product
manuals and technical data
sheets.
■ CX³ EMS bus:
There are 2 possible solutions for connection to the bus:
At the back of the
modules via
communication
rail Cat.Nos
4 149 01/02/03
The CX³ EMS bus connection specifications are common to all CX³ EMS
products and are detailed in the product data sheets.
At the bottom of
the modules via
communication cables
Cat.Nos 4 149 07/08/09
RAIL CONNECTION CABLE CONNECTION
It is possible to make a single voltage tap for several modules, make sure that:
-the voltage source is identical for all measuring points;
-a jumper must be installed between the modules, respecting the phase sequence;
-a protection must be set up for all the «voltage measurements» of the concerned measurement modules;
-this protection must be x times amperage of a module (x being the number of measurement modules).