Setup
Connections
maxon motor control
ESCON Servo Controller
Document ID: rel3601
3-15
ESCON Module 50/4 EC-S Hardware Reference
Edition: September 2013
© 2013 maxon motor. Subject to change without prior notice.
3.4.2
Back-EMF Signals
Best Practice
• Make sure that all three Back-EMF signal leads are of identical length and that they are being routed
in parallel. Thereby, keep the leads as short as possible.
• The Back-EMF signal leads must be connected with the corresponding motor winding terminals.
• If no motor output filter is used, the Back-EMF signal leads may be connected directly to the motor
winding terminals:
– Pin [13] BEMF-W1 with pins [1/2] motor winding 1
– Pin [14] BEMF-W2 with pins [3/4] motor winding 2
– Pin [12] BEMF-W3 with pins [5/6] motor winding 3
• If a motor output filter is used, the Back-EMF signal leads should be connected to the filter’s motor
exit side.
• For further details
“Motherboard Design Guide” on page 5-25.
Figure 3-3
Back-EMF Signal Circuit
Input voltage
0…50 VDC
Max. input voltage
±100 VDC
