Siemens Simatic IPC520A, Operating Instructions Manual

Page: 32 / 80

Installing and connecting the device
3.3 Connecting the device
SIMATIC IPC520A
32
Operating Instructions, 11/2021, A5E51366325-AA
3.3.3 Connecting the power supply
Note
The device should only be connected to a 12 to 24 V DC power supply which meets the
requirements of safe extra low voltage (SELV) according to IEC/EN/DIN EN/UL 61010-1.
Note
The power supply must be adapted to the input data of the device, see chapter "General
technical specifications (Page 53)".
If there are voltage peaks on power supply lines, use a protective device in the form of a
varistor (MOV) UMOV = U-rated x 1.2 (BLITZDUCTOR BVT AVD 24 (918 422) or compatible).
Requirements
• The protective conductor is connected.
• You are using the supplied terminal.
• A two-core cable meet the following requirements:
– a copper (Cu) cable with cross-section of 0.75 mm
2
to 2.5 mm
2
– rated temperature 70 °C
• Tightening torque: 0.56 Nm
• A slotted screwdriver with a 3 mm blade.
Procedure
Switch off the 24 V DC power supply.
Connect the wires of the power supply.
Connect the connection terminal at the marked position.