Power Consumption And Cable Length - ABB FEN-31 User Manual

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Power consumption and cable length

The power consumption of the module depends on many factors,
eg, max. speed of the motor, encoder pulse number per
revolution, encoder cable length and leakage capacitance. The
following figure shows the approximate power consumption of an
encoder with differential outputs, based on actual measurements.
Encoder power
consumption
P + 2.0 W
idle
P + 1.75 W
idle
P + 1.5 W
idle
P + 1.25 W
idle
P + 1.0 W
idle
P + 0.75 W
idle
P + 0.5 W
idle
P + 0.25 W
idle
EPN = 1024 ppr:
EPN = 2048 ppr:
EPN = 512 ppr:
EPN = Encoder pulse number
P = Encoder power consumption when idle. See encoder documentation.
idle
Approximate power consumption of an encoder for four different
cable lengths.
Installation
P
idle
0 300 600 900 1200 1500 1800 2100 2400
0 150 300 450
0 600 1200 1800 2400 3000 3600 4200 4800
600 750 900 1050 1200
Cable length
300 m
150 m
100 m
20 m
Motor
2700 3000
speed
1350 1500
(rpm)
5400 6000