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b) The parasitic capacitance between the motor wires must not bypass 100nF. If very long
cables (hundreds of meters) are used, this condition may not be met. In this case, add
series inductors between the IBL2401 outputs and the cable. The inductors must be
magnetically shielded (toroidal, for example), and must be rated for the motor surge
current. Typically the necessary values are around 100 μH.
c) A good shielding can be obtained if the motor wires are running inside a metallic cable
guide.
3.2.9. Feedback connections
Single-ended encoder connection
Single-ended encoder
connection
Shield
GND
+5VOUT
Enc A+
J2
5
+5V
16
9
12
Enc B+
10
13
Enc Z +
IBL2401 v1.0
11
14
470R
+5V
1K
47K
470R
+2V
+5V
1K
47K
470R
+2V
+5V
MotionChipTM
3.2.9.1
1K
47K
+2V
+3.3V
Figure 3.15. Single-ended encoder connection
© Technosoft 2010
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IBL2401 Technical Reference