Connecting Devices With 3-Pin 24 V Dc - Siemens SIMATIC IFP2200 Operating Instructions Manual

3.4.3.2

Connecting devices with 3-pin 24 V DC

Note before connecting the device
Safety extra-low voltage (SELV)
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 60950-1. A
protective conductor must also be used. The power supply must meet the requirement
NEC Class 2 or LPS according to the IEC/EN/DIN EN/UL 60950-1.
The conductors must withstand the short-circuit current of the 24 V DC power source, so
that a short-circuit will not damage the cable. Only connect cables with a minimum cross-
section of 1.3 mm
Note
The 24 V DC power supply must be adapted to the input data of the device (see technical
specifications).
Procedure
1. Switch off the external 24 V DC power supply.
2. Connect the 24 VDC plug connector to the
Note
Reverse-polarity protection
The DC power supply (24V) has a mechanism to protect against reverse polarity. In the
event that the 24 VDC lines are reversed (24 VDC nominal (-20% / +20%) and connected to
ground, the device will not be damaged. The device will simply fail to turn on. After the power
supply has been connected correctly, the device will again be ready to operate.
Industrial Flat Panel IFP1500, IFP1900, IFP2200, IFP1900 PRO, IFP2200 PRO, IFP1900 ETH, IFP2200 ETH
Operating Instructions, 07/2016, A5E31298376-AF
WARNING
(AWG16) and a maximum cross-section of 3.3 mm
2
device.
Observe the correct polarity of the contacts:
①
DC 24 V
②
ground
③
protective conductor
Installing and connecting the device
3.4 Connecting the device
(AWG12).
2
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