Application Note
14
<Revision 2.4>
<<2019-06-17>>
Assembly Instructions for the Easy-PressFIT Modules
6
Mounting a PCB to the module
For mounting a PCB onto the module, additional screws can be used if desired. These screws will be tightened
into the stand-offs of the module.
An electronically controlled, or a slowly turning electric screwdriver, with n ≤ 300 rpm, is the preferred
mounting tool.
Due to the lack of accuracy, we do not recommend the use of pneumatic screwdrivers or manual screwdrivers.
Figure 13
Detailed view of the assembly insert
The effective length of the thread in the stand-off should have a minimum of 4 mm and a maximum length of
8 mm.
The initial 1.5 mm of the mounting stand-off serves as guidance only and cannot take any force. The thread in
the plastic will form during the screwing process.
For the choice of the screw length, the given PCB thickness has to be taken into account.
The following screws are tested to fix the PCB to the module:
Ejot PT WN 1451 K25*10 A2K Mmax=0,45 Nm ±10%
Ejot DELTA PT WN 5451 K25*8 Mmax=0,4 Nm ±10%
Metric screws: M2.5*x – for example, M2.5*8 or M2.5*10 depending on the thickness of the PCB used
To avoid damage or splitting of the stand-off, straight insertion of the screw into the stand-off has to be
observed during assembly.
