Siemens SIMATIC HMI Betriebsanleitung Seite 29

Installation and connection
4.1 Fitting operator controls
CAUTION
Damage due to overheating
The extension unit comes with a sealed enclosure. The operation of electrical devices in
the extension unit can cause a buildup of heat in the enclosure which in turn may damage
the operator controls.
When installing, make sure the maximum permissible ambient temperatures of all the
operator controls are taken into consideration.
IP65 degree of protection at risk
The IP65 degree of protection for the entire extension unit is only guaranteed if all the
operator controls have IP65 degree of protection and have been installed in an IP65-
protected manner. Otherwise, water can penetrate the extension unit enclosure and
damage the operator controls.
Operating voltage in the housing
Only operator controls with 24VDC are permitted in the housing of the extension unit.
NOTICE
Dimensions of the operator controls
The cover is wider and higher than the rear of the enclosure. Operator controls that fit in
front of the cover may be too large to install due to their overall dimensions.
Before installation, check the dimensions of the enclosure, electronics and connections of
the operator controls. In doing so, also take into account connectors that have been
connected.
Procedure
To install an operator control in the cover, proceed as follows:
1. Mark the required cut-out in the extension unit cover.
2. Make the mounting cut-out for the operator control in the cover of the extension unit.
3. Insert the operator control in the mounting cut-out.
4. Fit the operator control as described in the operating instructions.
See also
Dimension drawing extension unit - housing (Page 38)
Extension Units
Operating Instructions (Compact), 02/2009, A5E02296499-01
4
29