Manual MVK-MP
8 V 3.5
2. Configuration
2.1 Power Supply
Bus modules require a direct-voltage power supply of typically 24 VDC (SELV/PELV) which must
comply with the regulations of conventional industrial power-utility companies.
In order to optimize interference immunity, we advise you to power sensors, bus,
and actuators from different sources. The power supply should be primary
switched-mode or regulated power supplies.
The output of the power supply units depends on the number of connected electrical consumers and
their output.
In any case, it must be ensured that the system voltage does not drop below 18 V
DC viewed from the system power supplies and measured at the remotest slave.
System response becomes unspecific if sensor and bus power supply drop below
18 V DC.
Primary switched-mode power supply units normally permit an increase in output
voltage to the amount of the rated voltage in order to compensate for any power
losses.
Modules with digital inputs support the direct connection of commercially available sensors. A separate
power supply may be necessary for the sensors if the total power required is high due to the number of
slaves or a high power draw of the sensors.
2.1.1 Recommended Power Supply Units
Primary switched-mode power supply units from Murrelektronik are specially designed to power
automation systems. For this reason, we recommend them to power the modules.
Please refer to our catalog or to: www.murrelektronik.com
2.1.2 Cable Cross Sections
The max. cable cross section is 1.5 mm². It is limited to this max. diameter by the 7/8" plug.
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