X27 (Rs 422/485) Interface Of The Cp - Siemens SIMATIC CP 440 Manual

Connecting Cables
B.1

X27 (RS 422/485) Interface of the CP 440

Pin Assignment
The table below shows the pin assignment for the 15-pin subminiature D female
connector in the front panel of the CP 440.
Table B-1 Pin Assignment for the 15-Pin Subminiature D Female Connector of the Integrated Interface
of the CP 440
Female Connector Pin
on the
CP440-RS422/485*
1
2
3
4
8
15
7
14 14
6 6
13 5
5 5
12 12
4
6
11 11
3 3
7
10 10
2
9 9
1
8
9
10
11
12
13
14
15
* Front view
B-2
Designatio Input/Output
n
– –
T (A)– Output
– –
R (A)/ Input
T (A) –
Input/Output
– –
– –
– –
GND –
T (B) + Output
– –
R (B)/ Input
T (B) +
Input/Output
– –
– –
– –
– –
Point-to-point connection CP 440 Installation and Parameter Assignment
Meaning
–
Transmitted data (four-wire operation)
–
Received data (four-wire operation)
Received/transmitted data (two-wire
operation)
–
–
–
Functional ground (floating)
Transmitted data (four-wire operation)
–
Received data (four-wire operation)
Received/transmitted data (two-wire
operation)
–
–
–
–
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