Siemens SIMATIC ET 200M Operating Instructions Manual page 43

Permissible Ambient Temperature
The following ambient temperature ranges are available:
● In horizontal mounting position: From 0°C to 60 °C
● In vertical mounting position: From 0°C to 40 °C
When configuring the ET 200M with IM 153-1AA8x or IM 153-2BA8x (outdoor) and
SIPLUS S7-300 modules the specified temperature range extends up to -25 °C.
3.5.2 Clearance Measurements
Controlling
If you adhere to the minimum clearance measurements:
● you will guarantee heat dissipation of the S7-300 modules.
● you will have sufficient space to insert and remove the S7-300 modules.
● You have sufficient space for running cables.
Using a shielding contact element you can connect shielded lines directly with the rail. This
increases the S7-300 rack´s installation height to 185 mm! You must nevertheless adhere to
the distance of 40 mm.
Clearance Measurements
The following figure shows you the clearance measurements to nearby cable ducts,
apparatus, cabinet walls etc. for an ET 200M installation.
If you use a shield contact element, the dimension specifications apply from the lower edge
of the shield contact element.
Figure 3-6
ET 200M
Operating Instructions, 12/2008, EWA-4NEB780600602-08
Clearance measurements for an ET 200M installation on a mounting rack
Assignment planning
3.5 Configuring the mechanical structure
41