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1 Technical Description

CP 343−2 / CP 343−2 P AS−Interface Master

Release 08/2008

C79000−G8976−C149−04

1.2 Overview of the Module

1.2.1 Uses of the Module

The CP 343-2 module can be operated in the automation systems (AS or PLC) of

the S7-300 series and in the ET 200M system. It allows the connection of an AS-i

chain to the programmable controllers listed above.

Using the CP 343-2, you can access the inputs and outputs on the AS-i slaves

from the PLC. Depending on the slave type, you can access binary values or

analog values.

All AS-i slaves complying with AS-i specification V3.0 can be operated except for

slaves complying with slave profile 7.1 and 7.2.

Binary actuators/

sensors without

Branch of the AS-i

cable

AS-i power supply unit

Active module

(with slave ASIC)

Passive module

(without slave ASIC)

AS-i cable

Binary sensors/actuators

with slave ASIC

CP 343-2

S7−300

slave ASIC

Actuator/sensor

with direct connection

Figure 1-1 Using the CP 343-2 Master Module in the S7-300

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Siemens CM343 Series Manual de servicio Pagina 12