Siemens SIMATIC IPC677E Operating Instructions Manual page 51

Requirement
● You have observed the information under "Country-specific information on supply voltage
(Page 46)".
● The 24 V DC power source must be adapted to the input data of the device
(see Technical specifications (Page 111)).
Procedure
1. Make sure that the ON/OFF switch is in the position "I" (OFF) to prevent unintentional
startup of the device when it is connected to the 24 V DC power supply.
2. Switch off the external 24 V DC power supply.
3. Connect the 24 V DC plug connector to the device.
Observe the correct polarity of the contacts:
①
②
③
4. If necessary, install the enclosed cable grip.
5. Secure the 24 V DC cable to the cable grip using a cable tie.
Note
Reverse-polarity protection
The 24 V DC power supply is protected against polarity reversal. When you confuse the
24 V DC connecting cables and ground, the device is not damaged but does not switch on.
After the power supply has been connected correctly, the device will again be ready to
operate.
SIMATIC IPC677E
Operating Instructions, 04/2019, A5E45117996-AA
Protective conductor
Ground
24 V DC
Mounting and connecting the device
3.3 Connecting the device
51