Operation Planning4-30 © Siemens AG 2007 All Rights ReservedSICLOCK ® TC 4004.4.2 Permitted mounting positionThe only permissible mounting position is horizontal, i.e. the display is read hori-zontally. Adequate ventilation cannot be guaranteed in other mounting positionsFigure 4-1 Horizontal mounting position4.4.3 Fixing methodThe housing can be snapped onto DIN rails or fixed to SIMATIC S5 standardmounting rails.See also Installation overview (Section 5.1).