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Siemens SIMATIC S7-400 CP 440 User Manual

Siemens SIMATIC S7-400 CP 440
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Startup Characteristics and Operating Mode Transitions of the CP 440
7.4 Behavior of the Sender Line Drivers of the Serial Interface During Particular Operating Modes of the CP
Point-to-point connection CP 440 Installation and Parameter Assignment
114 Manual, 09/2007, A5E00057742-03
7.4 Behavior of the Sender Line Drivers of the Serial Interface During
Particular Operating Modes of the CP
Behavior of the Sender Line Drivers
Table 7-1 Behavior of the Sender Line Drivers
Status Line Drivers
The CP 440 is deenergized High resistance
The CP 440 is in the expansion rack with its own power supply, but the
central controller is switched off.
High resistance
No parameters are assigned to the CP 440. High resistance
No parameters are assignmed to the CP 440; the sender is in an idle
state
3964
ASCII, operating mode RS422, multipoint, master
ASCII, operating mode RS422, multipoint, slave
ASCII, RS485
High level
High level
High level
High resistance
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Siemens SIMATIC S7-400 CP 440 Specifications

General IconGeneral
Product Type DesignationCP 440
Product TypeCommunication Processor
SeriesSIMATIC S7-400
Supply Voltage24 V DC
Number of Interfaces1
Communication InterfacePoint-to-point
Protocols SupportedASCII, 3964(R), RK 512
Power SupplyVia backplane bus
Operating Temperature0 °C to 60 °C
Interface TypeRS-422/485

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