Siemens SIMATIC PANEL PC 877 Operations Instructions Page 26

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Planning the use
3.4 Mounting positions and fastening
SIMATIC IPC677C
26 Operating Instructions, 05/2010, A5E02722710-01
3.4.4 Type of fixation
The computer unit is secured in the mounting cut-out either with clamps or screws.
NOTICE
Securing with screws is not possible with the 12" touch screen variant.
Select the type of fixation suitable to your requirements for the degree of protection (see
section "Protection against dust and water") .
3.4.5 Stainless steel front type of fixation
Type of fixation
The device is fastened with the included clamps. Additional fastening bore holes or threaded
bolts are not required for the control panel.
Degree of protection
CAUTION
Degree of protection IP66 is only ensured if the seal of the device is correctly positioned
and evenly pressed on the control panel. Refer to the "Installation" section for more
information.
3.4.6 Protection against dust and water
Principle
With the relevant installation, the device is protected on the front against the ingress of dust
and water. The "degree of protection" is in accordance with IEC 60529: On the front, the
device has degree of protection IP65, the rear of the operator section and the computer unit
have degree of protection IP20.
CAUTION
Ensure that the material strength at the mounting cut-out is a minimum of 2 mm and a
maximum of 6 mm. Please follow the specifications for the dimensions in the "Mounting cut-
out" section.
The degrees of protection IP65, IP54 and Enclosure Type 4, are only guaranteed when the
following conditions are met:
The surface plane deviation of the mounting cut-out in relation to the external dimensions of
the control unit amounts to ≤ 0.5 mm when the control unit is mounted.
Degree of protection IP65 and Enclosure Type 4
The degrees of protection IP65 and Enclosure Type 4 are only provided for clamp mounting
together with a ring seal.
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