4
Electrical installation
28
Festo – EXCM-10/-30-...-E-EN – 1612b – English
4.2.1
Power supply [X1]
Connection
Pin
Function
1
3
FE
FE
Functional earth
1
Logic voltage
+24 V
(±15 %)
Power supply for the control
electronics
2
Load voltage
+24 V
(±15 %)
Power supply for the output
stage and the motor
3
Reference
potential
0 V
Reference potential for load
voltage, logic voltage and
control interface
Tab. 4.3
Voltage supply [X1] connection
Note
To ensure compliance with EMC safety:
–
The maximum length of the individual cables should not exceed 30 m.
–
With a line length of 3 m or greater, a folding ferrite with the following characteristics
must be attached to the power supply cable in front of the controller:
–
Impedance at 100 MHz: 241
W
; impedance at 25 MHz: 141
W
Requirements to be met by the power supply
Warning
Use only PELV circuits in accordance with IEC/DIN EN 60204-1 (protective extra-low
voltage, PELV) for the electrical power supply.
Also comply with the general requirements for PELV circuits laid down in
IEC/DIN EN60204-1.
Use only power units which guarantee reliable electrical isolation of the operating
voltage as per IEC/DIN EN 60204-1.
Protection against electric shock (protection against direct and indirect contact) is guaranteed in ac
cordance with IEC/DIN EN 60204-1 by using PELV circuits (Electrical equipment of machines, general
requirements).
Caution
Damage to the device
The power supply inputs have no special protection against overvoltage.
Make sure the permissible voltage tolerance is never exceeded.
Technical data of the voltage supply (
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