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1 Technical Description

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

Release 08/2008

C79000−G8976−C149−04

1.3 Technical Specifications of the Module

The CP 343-2 / CP 343-2 P module has the following characteristics:

Table 1-1 Technical Specifications

Feature

Explanation/Values

Bus cycle time 5 ms with 31 slaves

10 ms for 62 slaves with the extended

addressing mode

Depending on the slave profile, analog values

have longer update times.

Configuration Using buttons on the front panel or with

STEP 7

(download of the configuration with

FC “ASI_3422”, see section 5.1)

Supported AS-i master profiles M4

Connection of the AS-i cable Via S7-300 front connector with screw

contacts (20-pin)

Current load between contact 17 and 19 and

between 18 and 20 maximum 4 A

Address area 16 I bytes and 16 Q bytes in the analog area

of the S7-300

Current consumption from SIMATIC

backplane bus

Power supply SIMATIC backplane bus

Current consumption from the AS-i cable

Power supply from the AS-i cable

max. 200 mA

5 V DC

max. 100 mA

DC 29.5 to 31.6 V, according to the AS–i

specification

Ambient conditions

S Operating temperature

S Transportation and storage temperature

S Relative humidity

S 0..60_C (horizontal installation of the S7

standard rail)

S 0..40_C (vertical installation of the S7

standard rail)

−40_C to +70_C

max. 95% at +25_C

Construction

S Module format

S Dimensions (W x H x D) in mm

S Weight

Compact module S7-300, single width

40 x 125 x 115

approx. 200 g

1 2 ... 10 11 12 13 14 15 16 17 18 19 20 ... 139 140

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