Power Consumption - ABB RTAC-01 User Manual

Power
consumption
RTAC-01 User's manual
Without an external power supply, the RTAC-01 can
supply 5 W (at either 15 V or 24 V DC) to the encoder.
For higher power, an external power supply is required.
As the power consumption of the module depends on
many factors (e.g. max. speed of the motor, encoder
pulse number per revolution, encoder cable length and
leakage capacitance), it should be checked on each
occasion if an external power supply is needed. See the
encoder documentation for details. Figure
the approximate power consumption of an encoder with
differential outputs, based on actual measurements.
The external power supply should be connected as
shown below.
Note: With an external power supply, the voltage
selection jumper should be removed from X1.
V 0V
cc
Figure 3-1 External power supply connection diagram
Chapter 3 – Installation
0V
V
cc
3-2 shows
RTAC
X1
1 0 V
2 0 V
3 V OUT
4 +15V
5 V IN
6 +24V
X2
SHLD
2
3-3