Siemens SIMATIC S7-400 CP 440 User Manual

Cables
B.2 Cables
Point-to-point connection CP 440 Installation and Parameter Assignment
144 Manual, 09/2007, A5E00057742-03
B.2 Cables
Cables
If you make your own cables you must remember that unconnected inputs at the
communication partner may have to be connected to open-circuit potential.
Note that you must only use shielded connector housings. A large surface area of both sides
of the cable shield must be in contact with the connector casing. You are advised to use
Siemens V42 254 shielded connector casings.
CAUTION
Never connect the cable shield with the GND, as this could destroy the submodules. GND
must always be connected on both sides (pin 8), otherwise the submodules could again be
destroyed.
In the Following
The following pages contain examples of cables for a point-to-point connection between the
CP 440 and S7 modules or the SIMATIC S5.
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Siemens SIMATIC S7-400 CP 440 Specifications

General

Product Type Designation	CP 440
Product Type	Communication Processor
Series	SIMATIC S7-400
Supply Voltage	24 V DC
Number of Interfaces	1
Communication Interface	Point-to-point
Protocols Supported	ASCII, 3964(R), RK 512
Power Supply	Via backplane bus
Operating Temperature	0 °C to 60 °C
Interface Type	RS-422/485