Siemens SIMATIC KP400 Comfort Operating Instructions Manual page 45

Connecting the power supply terminal
NOTICE
Damage
Do not tighten the screws of the power supply terminal if it is plugged into the HMI device.
The pressure from the screwdriver may otherwise damage the HMI device socket.
Only connect the wires when the power supply terminal is withdrawn.
Connect the power supply terminal to the cables of the power supply as shown in the figure
above. Ensure that the lines are connected properly to the correct terminals. Refer to the
label for the contact pins on the rear of the HMI device.
Reverse polarity protection
The HMI device is equipped with a reverse polarity protection circuit.
Connecting the uninterruptible power supply
The following figure shows the connection between the uninterruptible power supply (UPS)
and HMI device. The uninterruptible power supply is connected to the 24-V input and one of
the HMI device's USB type A ports.
When connected to the HMI device's USB port, the following uninterruptible power supplies
are supported:
SITOP DC UPS modules as of a rated power value of 6 A, e.g. 6EP1931-2DC42
See also
Setting the uninterruptible power supply (Page 106)
Comfort Panels
Operating Instructions, 03/2012, A5E03404994-02
Mounting and connecting the HMI device
3.3 Connecting the device
45