TMCM-6214 Hardware Manual • Hardware Version V1.30 | Document Revision V1.10 • 2019-MAR-25
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3 Mechanical and Electrical Interfacing
3.1 Size of board
The board with the controller/driver electronics has an overall size of 130mm x 100mm x 20mm without
mating connectors. Maximum component height (height above PCB level) without mating connectors
is around 15mm above PCB level and 3 mm below PCB level. There are four mounting holes (3.2mm
diameter) for M3 screws.
Figure 1: Board dimensions and position of mounting holes (all values in mm)
3.2 Board mounting considerations
The TMCM-6214 offers four metal plated mounting holes. All mounting holes are connected to system and
signal ground (same as power supply ground). In order to minimize distortion of signals and radiation
of HF signals (improve EMC compatibility) especially in sensitive / noisy environments it is important to
ensure a solid ground connection within the system. In order to support this, it is recommended to
connect all four mounting holes of the board in addition to the supply ground connection to system power
supply ground. Nevertheless, this might not always be an option e.g. in case the metal system chassis /
TMCM-6214 mounting plate is already connected to earth and a direct connection between supply ground
(secondary side) and mains supply earth (primary side) is not desired / not an option. In this case plastic
(e.g. made of nylon) spacers / distance bolts and screws should be used.
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