Siemens SIMATIC IOT2040 - Connecting the Power Supply

Installing and connecting the device
3.3 Connecting the device
SIMATIC IOT2020, SIMATIC IOT2040
Operating Instructions, 10/2016, A5E37656492-AB
27
3.3.2
Connecting the power supply
Note
The device should only be
connected to a 9...36 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
IEC/EN/DIN EN/UL 60950
-1.
Note
The power supply must be adapted to the input data of the device, see chapter "
General
technical specifications
(Page 45)".
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).
Requirement
● You are using the supplied terminal.
● A two-core cable with a cable cross-section of 0.75 mm
2
to 2.5 mm
2
.
● A slotted screwdriver with a 3mm blade.
Procedure
1.
Switch off the power supply.
2.
Connect the lines to the connecting
terminal as shown.
3.
Connect the connecting terminal to the
connection for the power supply.