Siemens SIMATIC NET CP 5621 Betriebsanleitung Seite 33

Assignment of the PROFIBUS interface
The pinning of the D-sub socket is as follows:
Pin no. Abbreviation Meaning
1 NC Socket pin 1 is not connected.
2 NC (M24) Socket pin 2 is not connected. With other MPI/DP
components, the return line of the floating 24 V power
supply may be connected to this pin.
3 LTG_B Signal line B of the CP 5621 module
4 RTSAS RTSAS, input signal for MPI/DP bus. The control signal is
"1" active when the AS is sending.
5 M5EXT M5EXT return line (GND) of the 5 V power supply. The
current load caused by an external consumer connected
between P5EXT and M5EXT must not exceed a
maximum of 90 mA.
6 P5EXT P5EXT power supply (+5 V) of the 5 V supply. The
current load caused by an external consumer connected
between P5EXT and M5EXT must not exceed a
maximum of 90 mA (short-circuit proof).
7 NC (P24V) Socket pin 7 is not connected. With other MPI/DP
components, the P24V supply of the floating 24 V power
supply may be connected to this pin.
8 LTG_A Signal line A of the CP 5621 module
9 RTS RTS output signal of the CP 5621 module. The control
signal is "1" active when the device (PG or PC) is
sending.
Shield on connector casing
CP 5621
Operating Instructions (Compact), 02, A5E01156749
Technical specifications
Input/output
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Input/output
Input
Output
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Input/output
Output
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