Installing and connecting the device
3.3 Connecting the device
SIMATIC IOT2050
Operating Instructions, 03/2024, A5E39456816-AF
31
Requirement
• T20 screwdriver
• Cable lug for M4
• Function earth with minimum cross-section of 2.5 mm
2
copper cable
Procedure
Clamp the cable lug on the function earth.
Firmly attach the cable lug to the function earth connection
on the device using the M4 thread with the torque of 1 Nm
(see part labeled).
Connect the function earth to the protective conductor con-
nection of the cabinet or the plant in which the device is in-
stalled.
3.3.3 Connecting the power supply
The device should only be connected power supply which meets the requirements of safe
extra low voltage (SELV) according to IEC/EN/DIN EN/UL 61010
-1.
IOT2050 SM: 24 VDC (20.4 to 28.8 V)
Other configurations for IOT2050: 12 to 24 VDC (9 to 36 V)
The power supply must be adapted to the input data of the device, see chapter "
General
(Page 100)".
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).
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