Siemens SIMATIC HMI IPC677C Operating Instructions Manual page 29

● The computer unit with DC power supply does not fulfill the requirements according to
● Provide adequate volume in the switchgear cabinet for air circulation and heat transport.
● Make sure that the maximum air intake temperature is not exceeded (refer to the
● The minimum distance between the device and the housing is 10 cm on the air output
● Position the device in such a way that the air vents of the housing are not covered up
● Ensure there is enough free space in the switchgear cabinet to allow the sheet metal
● Equip the switchgear cabinet with struts for stabilizing the mounting cut-out. Install struts
● Avoid extreme environmental operating conditions. Protect your device against dust,
● The device is designed for use in normal industrial environments to IEC 60721-3-3
● Install the device in such a way that it poses no danger, e.g. by falling over (see Chapter
● During assembly, please comply with the approved installation positions.
Additional information is available in the chapter "Dimensional drawings (Page 191)".
SIMATIC HMI IPC677C
Operating Instructions, 04/2013, A5E02722710-04
IEC/EN/DIN EN 60950-1 in the power supply unit area. The device must therefore be
installed in such a way that it is part of an operating area with restricted access (for
example, a lockable control cabinet, control panel or server room).
Note
When using the device in the area of Industrial Control Equipment (UL 508), ensure that it
is classified as "Open Type". A mandatory requirement for approval or operation
according to UL 508 is therefore that the device be installed in the mounting cutout of a
housing certified for UL 508.
Keep at least 10 cm distance between the device and switchgear cabinet.
"Technical specifications" chapter). The maximum air intake temperature must be
accounted for especially when sizing closed switchgear cabinets.
side at the fan.
following mounting.
cover to be removed. You will otherwise have to remove the device from the switchgear
cabinet or swivel arm when replacing memory or the battery.
where necessary.
moisture and heat.
(pollutant class 3C2 for chemical influence, 3S2 for sand and dust). The device may not
be operated in severe environments which are subject to caustic vapors or gases without
taking additional protective measures (such as the provision of clean air).
"Technical Specifications").
Note
If you mount the device in an impermissible installation position or you do not observe the
environmental conditions (see Chapter "Specifications"), you endanger the product safety
provided by the UL-approval and compliance with the low-voltage directive (via
EN 60950-1). In additional, the functionality of the device is no longer guaranteed.
Planning the use
3.4 Mounting positions and fastening
29