Mounting and connecting the device
3.3 Connecting the device
SIMATIC IPC677E
Operating Instructions, 04/2019, A5E45117996-AA
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 Protective conductor
② Ground
③ 24 V DC
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
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.
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