Siemens SIMATIC CP 440 Manual page 156

Connecting Cables
Connecting Cable for X 27 (S7/M7 (CP 440) – CP 340/CP 341/CP 440/CP 441)
The figure below illustrates the connecting cable for a point-to-point connection
between a CP 440 and a CP 340/CP 341/CP 440/CP 441 for RS 422 operation.
For the connecting cables you require the following male connectors:
At the CP 440 end: 15-pin subminiature D male connector with a screw fixing
At the communication partner: 15-pin subminiature D male with a screw fixing
CP 440
Sender
Receiver
Casing shield
1) In the case of cables longer than 50 m you must solder in a terminating
resistor of approx. 330
Figure B-1
The connecting cable is available under the order number (6ES7 902-3...) specified
in Appendix D.
Note
This cable type can be used in the following lengths for the CP 440 as a
communication partner:
Max. 1200 m at 19 200 bps
Max. 500 m at 38 400 bps
Max. 200 m at 115 200 bps
B-4
2 T(A)– R(A)
9 T(B)+ R(B)
4 R(A)– T(A)
1)
11 R(B)+ T(B)
8 GND
Cable type
LIYCY 3 x 2 x 0.14.
T(A)/T(B) and R(A)/R(B)
twisted pairs.
on the receiver for trouble-free traffic.
X27 Connecting Cable for CP 440 – CP 340/CP 341/CP 440/CP 441 for
RS 422 Operation (Four-Wire)
Point-to-point connection CP 440 Installation and Parameter Assignment
Communication partner
4
1)
11
Receiver
2
9
GND 8
Shield
Casing shield
Sender
A5E00057742-02