Design-In - Mechanical Aspects
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COMX Communication Modules | Design Guide
DOC100901DG18EN | Revision 18 | English | 2013-12 | Released | Public
© Hilscher, 2002-2013
2.4 Mounting of COMX Modules
The COMX Module has two metal blocks for mounting. This guarantees a robust mechanical con-
struction and a solid connection to earth ground for the fieldbus connector.
The metal block close to the fieldbus connector must be connected to PE (= Protective
Earth).
The metal block close to the LEDs is not connected to the comX circuit and can be con-
nected to PE, too.
The metal blocks also define the distance between the module and host board. They are con-
nected together with M2.5 screws.
On the front side of the metal blocks there are a M2.5 thread to mount a front panel directly on the
module. This allows to have the same cutting in the device housing for all types of Modules.
Use fine technology that means six-mil-wide (150
μ
m) tracks
Note:
With this you have the possibility to get out between the pads.
For the power tracks you can insert a via straight in the pad.
To prevent a soldering problem please use a fine via (drill 0,2 mm).
Place a via between board edge and connector pad
Note:
There is 1 mm space between the connector and the board edge, where you can place
a 'normal' via (drill 0,3 mm) to feed the signals to the bottom side.
Figure 4: How to layout the Signals at the Connectors X1 and X2
