Installing and connecting the device
3.3 Connecting the device
SIMATIC IPC427E
Operating Instructions, 09/2017, A5E37454814-AB
41
Connecting the power supply
Please note the following to ensure you operate the device safely and in accordance with
regulations:
Risk of fire and electric shock
The on/off switch does not isolate the device from the power supply. Risk of electric shock if
the device is opened incorrectly or defective. There is also a risk of fire if the device or
connecting cables are damaged.
Death or serious bodily injury can result.
You should therefore protect yourself and the device as follows:
• Always pull out the power plug when you are not using the device or if the device is
defective. The power plug must be freely accessible.
• Connect the device to a protective conductor as instructed (see section "Connecting the
protective conductor").
• Use a central isolating switch for cabinet installation.
Note
The device should only be connected to a 24 V
DC power supply which meets the
requirements of safe extra low voltage
(SELV) according to IEC/EN/DIN EN/UL 60950-1.
The power supply must meet the requirement NEC Class 2 or LPS according to the
IEC/EN/DINEN/UL 60950
-1.
The device has reverse polarity protection.
● The device has been installed.
● The protective conductor is connected.
● 1 wired terminal.
The corresponding 24 V DC power supply is off.
● 1 0.5 × 3 Philips screwdriver
Insert the terminal at the marked
position.
Secure the terminal using the int
e-
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