4 Electrical installation
Festo – GDCP-CMMD-AS-HW-EN – 1404NH – English 41
4.9 Power supply [X9]
4.9.1 Logic power supply – protective extra-low voltage ( PELV)
Warning
Danger of electric shoc k
• Use for the electrical power supply only PELV c ircuits in accordance with EN 60204-1
(Protective Ex tra-Low Voltage, PELV).
Also observe the general requirements for PELV circuits as per E N 60204-1.
• Use only voltage sources that ensure a reliable electric separation of operating
voltage in acc ordance with EN 60204-1.
Through the use of PE LV circuits, protection from electric shock (protection from direct and indirect
contact) in ac cordance with E N 60204-1 is ensured ( Electrical equipment of machines. General require-
ments). A 24 V power supply unit used in the system must meet the requirements of EN 60204-1 for DC
power supply units (behaviour in case of voltage interruptions, etc.).
4.9.2 Pin allocation
Connection
Version
[X9] on the motor controller Phoenix Contac t - MSTBA 2.5/7-G-5.08 BK
Counterplug (plug set NEKM-C-4) Phoenix Contact - MSTB 2.5/7-ST-5.08 BK
Tab. 4. 21 Connection, power supply
The device is equipped with internal brake resistances. These are connected in parallel so that when
operating a single axis, twice the continuous braking power is available. Alternatively, an external brak-
ing resistor can be connected. If an external braking resistor is connected, this must be connected par-
allel to the internal braking resistors.
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