Mounting and connection 
  4.2 Mounting and connecting the OP 73micro 
OP 73micro, TP 177micro (WinCC flexible) 
Operating Instructions, 09/2007, 6AV6691-1DF01-0AB0 
45 
See also 
Interfaces (Page 41) 
Wiring diagram 
The figure below illustrates the connection between the power supply and the HMI device. 
 
Figure 4-6  Connecting the power supply 
The interfaces are described in the Specifications section. 
Note when connecting 
The power terminal block is included in the assembly kit and is designed for conductors with 
a maximum cross-section of 1.5 mm
2
.. 
Connecting the terminal block 
 
NOTICE 
 
Damage 
Pressure on the screwdriver may damage the HMI device socket if the terminal block is 
plugged in when you tighten the screws. 
Always remove the terminal block to connect the wires. 
 
*1'
DC +24 V
 
Figure 4-7  Connecting the terminal block 
Connect the power supply cables to the terminal block as shown in the figure above. Ensure 
that the cables are not crossed. Refer to the label showing the pin-out on the rear of the HMI 
device.