AS-Interface

System components and accessories

Addressing units

Overview

Before data transfer can take place with the master, addresses must be assigned to all stations before the AS-Interface network is created. This can

be performed offline using an addressing unit or

online using a master of the AS-Interface system.

The addresses themselves are the values 1 to 31 (or 1A to 31A and 1B to 31B for the extended specification). A new slave that has not yet been addressed has the address 0. It is recognized, also by the master, as a new slave (not yet addressed) and is not integrated in the normal communication in this state.

The addresses are assigned as required, i.e. it is of no conse- quence whether the first slave has the address 21 or whether ad- dress 1 is assigned to the first slave.

Function

Reading out the slave addresses 0 to 31, A/B

Reading out the I/O and ID-codes of the slaves

Standard and expanded ID-code 1 and ID-code 2

Standard and expanded addressing mode according to AS-Interface Version 2.1

Programming ID-code 1

Function testing of slaves: Read inputs and wire outputs of dig- ital or anlog slaves

AS-Interface test: Measurement of voltage (measuring range 0 to 35 V) and current consumption (measuring range 0 to 100 mA) of the AS-Interface bus

Storage: Complete plant configurations can be saved (profiles of all slaves, also extension in accordance with AS-Interface specification 2.1)

Detection of complete system configurations

6

Technical specifications

 

 

AS-Interface addressing and diagnostic unit

 

 

 

 

 

3RK1 904-2AB01

Power supply

 

The standard power supply is provided by 4 IEC LR6 (NEDA 15)

 

 

batteries and guarantees that at least 2,500 addressing operations

 

 

can be performed. To save the batteries, automatic switch-off takes

 

 

place approx. 1 min. after the last button operation.

Ambient conditions

 

 

• Operating temperature range in °C

 

 

 

0 to +55

• Storage temperature range in °C

 

 

 

-20 to +55 (without batteries)

• Relative humidity in %

 

 

 

Max. 75, condensation must be prevented

• Height above sea level in m

 

 

 

Up to 2,000

• Installation site

 

 

 

Indoors only

Mechanical design

 

 

• Degree of protection

 

 

 

 

- Units

 

 

 

IP50

- Connection sockets

 

 

 

IP20

• Dimensions in mm

 

 

 

84 x 195 x 35

• Connection

 

 

 

via M12 socket

 

 

 

Siemens IK PI · 2004

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Image 147
Siemens EN 50295 manual Addressing units, 147, AS-Interface addressing and diagnostic unit, 3RK1 904-2AB01

EN 50295 specifications

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