Cabinet design and EMC Booksize
12.6 24 V DC supply voltage
Booksize Power Units
Manual, (GH2), 07/2016, 6SL3097-4AC00-0BP8
699
For "PU III 24V AC/DC", terminals 11, 12, 14 are electrically isolated monitoring co
n-
tacts (11 common, 12 NC contact, 14 NO contact). In the case of a
thermal overload
of the integrated varistor, contact 11-12 is opened and contact 11-14 is closed.
The metallic enclosure of the SINAMICS components and the PE connection of the
surge arrester must be connected with one another to ensure a good electri
cal con-
nection (equipotential bonding). This can be achieved by installing the SINAMICS
components on a metallic mounting plate and connecting the PE connections of the
overvoltage protection elements as directly as possible to the mounting plate.
napping the surge arrester (MCZ OVP TAZ) onto a metal mounting rail, the PE
connection (terminal 5) is connected to the mounting rail. It is then sufficient to esta
b-
lish a good conductive connection between the DIN rail and the metallic enclosure of
the SI
NAMICS component (equipotential bonding). This is the case when both the
DIN rail and the SINAMICS component are mounted on a common metal mounting
plate.
Typical 24 V current consumption of the components
A separate 24 V power supply must be used for the SINAMICS S120 drive line-up.
The following table can be used to calculate the 24 V DC power supply for the components.
The values for typical current consumption are used as a basis for configuration.
Table 12- 7 Overview of the 24 V DC current consumption
Typical current consumption [A
DC
]
CU320-2 (without load)
1.00
SMC10
without/with encoder system
SMC20
without/with encoder system
SMC30
without/with encoder system
SMC40
without/with encoder system
SME20
without/with encoder system
SME25
without/with encoder system
SME120
without/with encoder system
SME125
without/with encoder system
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