Siemens SIMATIC IPC277E 19" INOX PRO Operating Instructions Manual page 15

The protective conductor connection on the device must be connected to the protective
conductor of the control cabinet or system in which the device is installed.
Electric shock and fire hazard when protective conductor is not connected
High voltage may be present in a defective device, which can cause fire or an electric
shock if touched. Death and serious bodily injury can result.
• Connect the device to the protective conductor before you put it into operation.
• Never operate the device without protective conductor.
• If a device is defective, remove it from operation without delay and label it accordingly.
Risk of fire and electric shock
The on/off switch does not isolate the device from the power supply. Risk of electric shock if
the device is opened incorrectly or defective. There is also a risk of fire if the device or
connecting lines are damaged.
You should therefore protect the device as follows:
• Always pull out the power plug when you are not using the device or if the device is
• Connect the device to a protective conductor as instructed (see "Connecting the
• Use a central isolating switch in the case of cabinet installation.
Electric shock and fire hazard with unsuitable power supply
Voltages that exceed an extra-low voltage can cause electric shock or fire. Death or serious
bodily injury can result.
• Always wire the device to a 24 V DC power supply that is compliant with SELV
• A current source in accordance with NEC Class 2 is required in order to fulfill the
• In all other cases according to IEC/EN/DIN EN 60950-1, either a current source of
IPC277E 19" INOX PRO
Compact Operating Instructions, 05/2017, A5E37416443-AE
WARNING
WARNING
defective. The power plug must be freely accessible.
protective conductor").
WARNING
requirements in accordance with IEC/UL/EN/DIN EN 60950-1.
requirements according to UL 60950-1 and UL 508.
limited output (LPS = Low Power Source), or a line-side fuse or a line-side circuit
breaker is necessary. Current must be limited to 4.16 A. This requires a max. 4 A fuse.
Installing the device
3.2 Mounting and connecting the device
15