3
Commissioning
26
Festo – EXCM-30/-40-...-PF-EN – 1603 – English
3.2.1
Power supply [X1]
Connection
Pin
Function
1
4
1
GND
0 V
Reference potential for
load voltage
2
Load voltage
+24 V ±10 %
or
+48 V ±10 %
Power supply of the
power output stages of
the motors
3
GND
0 V
Reference potential for
logic voltage
4
Logic voltage
+24 V ±15 %
Power supply for the
control electronics and
brakes
Tab. 3.1
Voltage supply [X1] connection
Requirements to be met by the power supply
Note
Observe technical data of the power supply (
è
A.1.4 Electrical characteristics).
The maximum length of the individual cables should not exceed 30 m.
Warning
Use for the electrical power supply only PELV circuits in accordance with EN 60204-1
(Protective Extra-Low Voltage, PELV). Also take into account the general require
ments for PELV circuits in accordance with EN60204-1.
Use only power sources which guarantee reliable electrical isolation of the operating
voltage in accordance with EN 60204-1.
3.2.2
Functional earth
The threaded bolts next to the power supply [X1] of the controller serves to connect the functional
earth (galvanically separated from the reference potentials) to comply with EMC security.
Connection
Function
Functional earth
Tab. 3.2
Functional earth connection
Note
Connect the functional earth connection with low impedance to the earth potential
to avoid electromagnetic interferences.