Electrical connections
Ex p Control Unit
SIEMENS Set
Page 36 of 80
01-37A2-7D0004_SIEMENS_Manual_Exp-Control-Unit_20220216_0_en.docx
Rev. 0
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Connection terminals “Ex e”
6.2.1.1
Terminal row “X3”
ATTENTION
MATERIAL DAMAGE DUE TO INCORRECT SUPPLY VOLTAGE.
Internal electronics of the Ex p control unit can be destroyed.
Before activating the supply voltage, compare the value of the supply
voltage with the printed value of the control unit.
Active protective measure.
As an active protective measure, the supply voltage is protected by a
fuse (min 1500 A breaking capacity) and an FI current circuit breaker.
EMC-compliant wiring
Internal electronics can be disturbed by a lack of EMC measures and cause
unforseen shutdowns.
Loop the supplied ferrite sleeve into the power supply.
See EMC-compliant wiring
The supply voltage is connected to terminal row X3.
Assembly of ferrite sleeve
Procedure:
Loop the conductors “L“ and “N“ through the ferrite
sleeve once more.
Connect the conductors “L“ and ”N“ to the terminals
provided.
Terminal
Connection
Function
1
PE
PE power supply
2
L (+)
Phase (+ conductor) power supply
3
N (-)
Neutral (GND) power supply