Siemens SIMATIC HMI OP 77B Operating Instructions Manual page 18

, Q V W D O O L Q J W K H 2 3   %
Caution
The degree of protection against water and dust can
only be guaranteed when the following is maintained:
• Material thickness for the installation cut-out
2 mm to 6 mm
• Deviation of the installation cut-out to the horizontal
plane in respect of the overall dimensions of the HMI
device:
≤ 0.5 mm
•
Permissible surface roughness in the area of the
installation seal:
≤ 120 µm (R
An installation cut-out complying to the figure below is
required:
Figure 3–3 Installation cut-out
Ensure that the switching cabinet has enough space to
allow a sufficient circulation of air.
3–4
Release 03/2004
120)
z
135 +1
Operating Instructions (Compact) OP 77B
6AV6691-1EA01-0AB0