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

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
+ 1.75 W
P
idle
+ 1.5 W
P
idle
+ 1.25 W
P
idle
+ 1.0 W
P
idle
+ 0.75 W
P
idle
+ 0.5 W
P
idle
P + 0.25 W
idle
EPN = 1024 ppr:
EPN = 2048 ppr:
EPN = 512 ppr:
EPN = Encoder pulse number
= Encoder power consumption when idle. See encoder documentation.
P
idle
P
idle
0 300 600 900
0 150 300 450
1200 1800
0 600
1200 1500 1800 2100
600 750 900 1050
2400 3000 3600
4200
Installation 27
Cable length
300 m
150 m
100 m
20 m
2400 2700 3000
Motor
speed
1200 1350 1500
(rpm)
4800 5400 6000