Mounting and connection
4.2 Mounting and connecting the OP 73micro
OP 73micro, TP 177micro (WinCC flexible)
46
Operating Instructions, 09/2007, 6AV6691-1DF01-0AB0
Polarity reversal protection
The HMI device is equipped with a polarity reversal protection circuit.
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
4.2.3
Switching on power and testing the HMI device
Procedure – Switching on power and testing the HMI device
Proceed as follows:
1.
Plug the terminal block into the HMI device.
2.
Switch on the power supply.
After power on, the display lights up and the following dialog appears briefly:
OP 73micro
(2004-xx-xx)
bootloader vx.xx
Figure 4-8
Bootloader display
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.
Loader
Start
Transfer
Figure 4-9
Loader view