Festo MSE6-E2M Mounting, Installation, Commissioning page 23

3 Mounting and installation
Pin allocation
Caution
Short circuits can cause damage.
• Secure the system supplies externally.
The permissible current per pin at the supplies is max. 16 A.
• Note that the sum of both currents of the operating and load voltages flows over
Pin 3.
Plug connector
(Top view of device)
M18
1 2
4
3
Tab. 3.1 Pin allocation, system supply
Potential equalisation
The MSE6-E2M has two earth terminals for potential equalisation:
– Pin 4 (M18 plug connector) of the power supply connection of the system supply
– Earth terminal on the left-hand end plate of the electrical interlinking module
– Earth terminal on left-hand pneumatic connecting plate
Note
• Always connect the earth potential to pin 4 (M18 plug) "functional earth".
• Connect the earth terminal on the left-hand pneumatic base plate with low imped­
ance (short cable with large cross-sectional area) to the left end plate of the electric­
al interlinking module (pre-assembled on delivery).
• Connect the earth terminal on the left-hand end plate of the electrical interlinking
module with low impedance to the earth potential.
• With low-impedance connections, you can ensure that the earth terminal at the
left-hand end plate and the earth terminal at the power supply connection have the
same potential and that there are no equalising currents.
This prevents interference from electromagnetic sources and ensures electromagnetic
compatibility in accordance with EMC directives.
Festo – MSE6-E2M-IN-EN – 2017-07c – English
Pin System supply
1 24 V DC U
EL/SEN
2 24 V DC U
OUT/A
3 0 V U /
EL/SEN
0 V U
OUT/A
4 FE
Function
Operating voltage supply for the electronics
and sensors
Load voltage supply for actuators
Operating load voltage
Functional earth
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