Mounting Mc45 Onto The Application Platform - Siemens MC45 Manual

MC45 Hardware Interface Description
P R E L I M I N A R Y

5.2 Mounting MC45 onto the application platform

There are many ways to properly install MC45 in the host device. An efficient approach is to
mount the MC45 PCB to a frame, plate, rack or chassis. Fasteners can be M1.6 or M1.8
screws plus suitable washers, circuit board spacers, or customized screws, clamps, or
brackets. In addition, the board-to-board connection can also be utilized to achieve better
support.
If the bottom of MC45 faces the holding device, only use the ground pad for the connection.
To avoid short circuits ensure that the remaining sections of the MC45 PCB do not come into
contact with the host device since there are a number of test points. The ground pad can
also be used to attach cooling elements, e.g. a heat sink. Figure 29 shows the ground pad
on the bottom of MC45 and the positions of all test points.
Particular attention should be paid to the test point TP 402. Placed beneath the ground pad it
has been added for manufacturing only. When the pad is used for grounding the unit or
connecting a heat sink, extra care must be taken not to contact this test point.
The antenna pad on the bottom of the MC45 PCB must not be influenced by any other
PCBs, components or by the housing of the host device. It needs to be surrounded by a
restricted space as described in Chapter 5.4.2.
To prevent mechanical damage, be careful not to force, bend or twist the module. Be sure it
is positioned flat against the host device.
Note: Detailed mounting instructions and recommendations for integrating MC45 into the
host application shall be provided in later releases of this document.
MC45_HD_01_V00.02a Page 69 of 90 12.08.2002