Siemens PC 677B Operating Instructions Manual page 15

Drill holes in the mounting unit
1. Drill the holes at the prepared mounting cut-out according to the information for L3 and
2. Working from the front, insert the device into the 19" rack on the swivel arm or in the
3. Secure the control unit by inserting suitable screws and nuts
IP54 degree of protection
The IP54 degree of protection is guaranteed for mounting together with the ring seal.
Observe the panel seal when mounting
Ensure you do not damage the panel seal when mounting the device.
NOTICE
Control cabinet installation: Material strength at the mounting cut-out
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 "Preparing the
mounting cut-out" section.
The degrees of protection are only guaranteed when the following is observed:
• The surface plane deviation of the mounting cut-out in relation to the external
SIMATIC Panel PC 677B
Operating Instructions (Compact), 06/2008, A5E02217246-01
L4. (see Chapter "Mounting cut-out" )
mounting cut-out of the control cabinet.
CAUTION
dimensions of the control unit amounts to ≤ 0.5 mm when the control unit is mounted.
Installation / panel-mounting
3.5 Securing with screws
15