Connectable components
9.2 PP 72/48D PN
NCU 7x0.3 PN
Manual, 09/2011, 6FC5397-1EP40-0BA0
99
9.2.3.2 X1 power supply
Properties
This interface is intended exclusively for the connection of the external 24 V power supply.
On the module side, the power supplies are protected against:
● Polarity reversal
● Short-circuit (elec. current limitation of the outputs)
● Overload (self-restoring PTC fuse - Multifuse)
Requirements placed on the DC power supply
DANGER
In the case of supply lines > 10 m, protectors must be installed at the device input in order
to protect against lightning (surge).
The DC power supply must be connected to the ground/shield of the I/O module for EMC
and/or functional reasons. For EMC reasons, this connection should only be made at one
point; see also EMC Installation Guide.
Table 9- 13 Requirements of the DC power supply
According to EN 61131-2 24 V DC
Voltage range (average value) 20.4 V DC to 28.8 V DC
Voltage range (dynamic) 18.5 to 30.2 V DC
Voltage ripple peak-to-peak 5% (unfiltered 6-pulse
rectification)
Rated voltage
Booting time at POWER ON Any
≤ 35 V
Duration of overvoltage ≤ 500 ms
Recovery time ≥ 50 s
Non-periodic overvoltages
Events per hour ≤ 10
Outage time ≤ 3 ms
Recovery time ≥ 10 s
Transient voltage
interruptions
Events per hour ≤ 10
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