Mounting and connection
4.3 Mounting and connecting the TP 177micro
OP 73micro, TP 177micro (WinCC flexible)
Operating Instructions, 09/2007, 6AV6691-1DF01-0AB0
55
Connecting the power supply
CAUTION
Ensure safe electrical insulation of the power supply. Always use power supply modules
that conform to IEC 364-4-41 or HD 384.04.41 (VDE 0100, Part 410).
Always use power supply modules that comply to SELV (Safety Extra-Low Voltage) and
PELV (Protective Extra Low Voltage) standards.
The power supply voltage must always be within the specified range to prevent
malfunctions on the HMI device.
Equipotential bonding
Therefore, wire the 24 V output of the power supply to the equipotential circuit.
See also
Interfaces (Page 50)
4.3.3 Switching on power and testing the HMI device
Procedure
Proceed as follows:
1. Plug the terminal block into the HMI device.
2. Switch on the power supply.
The display lights up after power on. A progress bar is shown during startup.
If the HMI device does not start, it is possible the wires on the terminal block have been
crossed. Check the connected wires and change the connections if necessary. The
Loader opens once the operating system has started.
Figure 4-18 Loader view
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