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Ex p Control unit
APEX
px
Terminal row "X15"
Rev. 0
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 purging without deactivation.
Pressure sensor for additional pressure monitoring. The function is set via the
WEB interface.
Terminal
Connection
1
GND
2
OS1 Out
3
OS1 IN
4
24V OS1
01-37A2-7D0001_px_Manual_Exp-Control-Unit_20210923_0_en.docx
Pressure or gas sensors with 4...20 mA output can be
connected to the sensor input OS 1 [Ex ib].
The signal is processed depending on the setting of the
functions.
Function
Ground connection
Sensor output
Sensor input
Power supply sensor 1
Electrical connections
Page 51 of 96
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