4-16 Input / Output
MN1957
www.baldormotion.com
4.4.3.1 Encoder input frequency
The maximum encoder input frequency is affected by the length of the encoder cables.
The theoretical maximum frequency is 10 million quadrature counts per second. This is
equivalent to a maximum frequency for the A and B signals of 2.5 MHz. However, the effect
of cable length is shown in Table 1:
The maximum recommended cable length is 30.5 m (100 ft).
A and B signal
frequency
Maximum cable length
meters
feet
1.3 MHz
2
6.56
500 kHz
10
32.8
250 kHz
20
65.6
100 kHz
50
164.0
50 kHz
100
328.1
20 kHz
300
984.2
10 kHz
700
2296.6
7 kHz
1000
3280.8
Table 1: Effect of cable length on maximum encoder frequency
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07045-0097 • (973) 335-1007 • Toll Free: (800) 922-1103
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