Ex p Control Unit
SIEMENS Set
Electrical connections
Rev. 0
01-37A2-7D0004_SIEMENS_Manual_Exp-Control-Unit_20220216_0_en.docx
Page 43 of 80
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6.2.2.4
Terminal row “X13“
ATTENTION
ATTENTION WHEN CONNECTING EXTERNAL SENSORS TO THE EX P
CONTROL UNIT.
Ensure functional safety when connecting external sensors to the Ex p
control unit!
The external sensors must meet the requirements placed on SIL 2.
Two functions can be executed at the optional current input as standard.
Firstly, an additional pressure sensor can be connected or a current signal can
be used to trigger purge without deactivation.
Pressure sensor for additional pressure monitoring. The function is set via the
WEB interface.
Pressure or gas sensors with 4...20 mA output can be
connected to the sensor input OS 2 [Ex ia].
The signal is processed depending on the setting of the
functions.
Terminal
Connection
Function
1
GNDiso
Ground connection
2
OS2 Out
Sensor output
3
OS2 IN
Sensor input
4
24V OS2
Power supply sensor 2