Motherboard Design Guide
Requirements for Components of Third-party Suppliers
maxon motor control
4-72
Document ID: rel8003
EPOS4 Positioning Controller
Edition: May 2018
EPOS4 Module/Compact 50/5 Hardware Reference
© 2018 maxon motor. Subject to change without prior notice.
4.1
Requirements for Components of Third-party Suppliers
Best practice
For references and recommended components consult
4.1.1
Socket Headers
For implementation of the Module, 1.27 mm box headers are required.
4.1.2
Supply Voltage
To protect the Module, we recommend using an external circuit breaker, a TVS diode, and a capacitor in
the voltage supply cable. In this regard, please note the following recommendations:
Figure 4-48
Wiring of power supply
I
NPUT
F
USE
(FU1)
An input fuse (FU1) is necessary in order to provide reverse polarity protection. Together with an unipo-
lar TVS diode (D1), this prevents current from flowing in the wrong direction.
TVS D
IODE
(D1)
To protect against overvoltage resulting from voltage transients or brake energy feedback, we recom-
mend connecting a TVS (transient voltage suppressor) diode (D1) to the voltage supply line.
C
APACITOR
(C1)
The function of the Module does not necessarily require the use of an external capacitor. Nevertheless,
to further reduce voltage ripple and feedback currents, an electrolytic capacitor (C1) can be connected
to the voltage supply line. Use of an electrolytic capacitor is also recommended to avoid oscillations
caused by supply cable inductance or the Module’s built-in capacitors that could lead to a voltage over-
shoot at power plug-in.