Motherboard Design Guide
Requirements for Components of Third-party Suppliers
maxon motor control
EPOS4 Positioning Controller
Document ID: rel8399
4-87
EPOS4 Module/Compact 50/8 Hardware Reference
Edition: November 2018
© 2018 maxon motor. Subject to change without prior notice.
Table 4-72
Motherboard Design Guide – Recommended components
Motor Filter
Example 1
• Motor Choke L
22 μH
• Filter Capacitor Cf
150 pF, 100 V
• Snubber Capacitor Cs
330 pF, 100 V
• Snubber Resistor Rs
390 Ω, 0.125 W
Example 2
• Motor Choke L
2.2 μH
• Filter Capacitor Cf
220 pF, 100 V
• Snubber Capacitor Cs
470 pF, 100 V
• Snubber Resistor Rs
100 Ω, 0.25 W
RS232
(IC1)
(C3…C7)
RS232 transceiver (IC1)
• Texas Instruments (MAX202IPW)
• ST Microelectronics (ST202EBTR)
Capacitors (C3…C7)
• 100 nF, X7R, 16 V
Recommended components