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Siemens 6GK7343-2AH01-0XA0 SIMATIC NET CP 343-2 AS-Interface Master

Siemens 6GK7343-2AH01-0XA0 SIMATIC NET CP 343-2 AS-Interface Master

Item NO.: 3747981
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Detail

  • Product NameSiemens 6GK7343-2AH01-0XA0 SIMATIC NET CP 343-2 AS-Interface Master
  • Item NO.3747981
  • Weight0.2500 kg = 0.5512 lb = 8.8185 oz
  • CategoryPLC
  • BrandSiemens
  • Creation Time2026-08-26
Siemens 6GK7343-2AH01-0XA0 SIMATIC NET CP 343-2 AS-Interface Master

Siemens 6GK7343-2AH01-0XA0 SIMATIC NET CP 343-2 AS-Interface Master


ManufacturerSiemensModel6GK7343-2AH01-0XA0Product TypeSIMATIC NET CP 343-2 AS-Interface master for S7-300 and ET 200M

01Product Overview

Siemens 6GK7343-2AH01-0XA0 is a SIMATIC NET CP 343-2 AS-Interface master for SIMATIC S7-300 and ET 200M. It implements AS-i Specification V3.0 with master profile M4, supports up to 62 AS-i devices and transfers up to 496 input and 496 output signals. The module is configured through its set button, STEP 7 or the command interface and connects through the S7-300 backplane bus.

Selection ControlVerify the complete article number, electrical data, hardware, software, interfaces and installed-system requirements before ordering.

02Performance

Operating Capabilities

  • Supports up to 62 AS-i devices on one AS-Interface master channel.
  • Transfers up to 496 input signals and 496 output signals.
  • Provides a 5 ms AS-i cycle with 31 devices and a 10 ms cycle with 62 devices.
  • Transfers digital data through the process image or peripheral addresses.
  • Transfers analog values through the documented data-record mechanism.
  • Supports redundant operation with a redundant IM 153 arrangement and AS-i Power24V from product status 2 with firmware V3.1.

Product Identity

  • Manufacturer: Siemens
  • Model: 6GK7343-2AH01-0XA0
  • Product Type: SIMATIC NET CP 343-2 AS-Interface master for S7-300 and ET 200M
  • Status: Cancelled since October 1, 2025; spare-part migration planning required

03Technical Details

Manufacturer Siemens
Article Number 6GK7343-2AH01-0XA0
Product Designation CP 343-2 AS-Interface Master
Host Systems SIMATIC S7-300 / ET 200M
AS-i Specification Version 3.0
Master Profile M4
AS-i Interfaces 1
Maximum AS-i Devices 62
Maximum Input Signals 496
Maximum Output Signals 496
Cycle Time 5 ms with 31 devices; 10 ms with 62 devices
Configuration Set pushbutton, STEP 7 or command interface
Connection 20-pin S7-300 front connector
Power Supply Via S7-300 backplane bus
Power Loss 4 W
Degree of Protection IP20

04System Integration

  • Install the module on the S7-300 rail and verify the backplane-bus power budget.
  • Use the correct 20-pin front connector and maintain galvanic isolation requirements.
  • Preserve AS-i slave addresses, A/B addressing, profiles, input/output mapping and diagnostic assignments.
  • Use the set button only when the intended slave configuration and commissioning state are controlled.
  • For redundant ET 200M operation, verify the redundant IM 153 design and switchover behavior.
  • After exchange, compare configured and detected slaves, then test digital data, analog records, diagnostics and cycle timing.

05Applications

  • AS-Interface master integration in SIMATIC S7-300 stations.
  • ET 200M installations requiring an AS-i master channel.
  • Machines with up to 62 AS-i field devices and mixed digital or analog data.
  • Projects using process-image digital data and data-record analog transfer.
  • Redundant ET 200M architectures designed with compatible IM 153 modules.
  • Legacy AS-i systems requiring controlled spare-part replacement or migration.

06FAQ

How does CP 343-2 handle 62 AS-i devices without a 5 ms cycle?

With 62 devices the documented AS-i cycle is 10 ms; the 5 ms value applies to 31 devices.

Where are analog AS-i values transferred?

Siemens specifies data-record transfer for analog values, while digital data can use the process image or peripheral addresses.

Can this module work in a redundant ET 200M station?

Yes, redundancy is documented with a suitable redundant IM 153 architecture that must be engineered and tested as a system.

When is AS-i Power24V available on this article?

Siemens documents it from product status 2 with firmware V3.1, so the installed hardware and firmware must be verified.

What do the RUN, APF, CER, AUP, CM and SF LEDs support?

They provide operating and diagnostic indications for module, AS-i power, configuration and slave-related conditions; interpret them with the exact manual and online diagnostics.

Which migration product does Siemens identify?

Siemens points to the ET 200SP CM AS-i Master ST 3RK7137-6SA00-0BC1, which requires an engineered platform, wiring and software migration rather than a direct module swap.

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