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Siemens 6GK7343-1EX21-0XE0 SIMATIC NET CP 343-1

Siemens 6GK7343-1EX21-0XE0 SIMATIC NET CP 343-1

Product Name: SIMATIC NET CP 343-1 Industrial Ethernet Processor

Brand Name: Siemens

Model Number: 6GK7343-1EX21-0XE0

Place of Origin: Germany

Warranty: 12 Months

Whatsapp: +86 18020776782

Email: [email protected]

Appurtenance:

siemens 6gk7343 1ex21 0xe0 simatic net cp 343 1 industrial ethernet processor-1

Overview
Description
S7-300 Integration
Replacement Control
Specifications
Commercial Term
Contact info
FAQ
Other Products
Recommended Products

S7-300 Industrial Ethernet processor for PROFINET IO, S7 and open communication

Rack and project check: Confirm slots 4 to 11 in racks 0 to 3, the external 24 V supply, STEP 7 and NCM version, communication blocks, C-PLUG use, DHCP client identity and every configured partner before replacing or migrating the CP.

The CP 343-1 connects SIMATIC S7-300 or C7-300 stations to 10/100 Mbit/s Industrial Ethernet. It supports PROFINET IO controller and CBA operation, S7 communication, ISO, ISO-on-TCP, TCP, UDP, multicast, FETCH/WRITE, time synchronization, SNMP and IP access control.

Description

6GK7343-1EX21-0XE0 is the EX21 generation CP 343-1 for S7-300 and C7-300. The module is double-width, uses one RJ45 Fast Ethernet port and requires both the S7 backplane connection and an external 24 V DC supply.

Replacement behavior depends on where the project data is stored. A same-type module can restore data from the CPU or C-PLUG, while PROFINET CBA interconnections must be present on the C-PLUG or downloaded again with SIMATIC iMap.

S7-300 Integration

Commission the backplane, external supply and Ethernet identity before restoring higher-level services or PROFINET devices.

Rack position

Use an approved slot in rack 0 to 3 with IM 360/361; the CP is not permitted in an extension rack connected through IM 365.

Project storage

Identify whether the configuration is retained in the CPU, on the CP or on a C-PLUG before exchanging the module.

Communication blocks

Record AG_SEND, AG_RECV and other block versions, especially when the CP replaces an older EX10 or EX11 generation.

Replacement Control

The C-PLUG and DHCP identity can simplify recovery only when their original state and device compatibility are known.

C-PLUG handling

Power down before moving the C-PLUG, retain its orientation and confirm that it belongs to the same compatible device type.

DHCP identity

Use a configured client ID if the station must receive the same address after the new factory MAC address appears.

Service checks

Verify PROFINET IO, CBA, S7, open communication, time synchronization and access-control behavior separately.

Specifications

Product type designation

SIMATIC NET CP 343-1

Order number

6GK7343-1EX21-0XE0

PLC platform

SIMATIC S7-300 / C7-300

Ethernet interface

One RJ45, 10/100 Mbit/s

Engineering

STEP 7 / NCM IE V5.3 SP2 or higher

Rack placement

Slots 4 to 11 in racks 0 to 3 with IM 360/361

Configuration memory

Optional C-PLUG, up to 32 MB

Supply voltage

24 V DC, +/-5%

Current consumption

200 mA typical backplane; 200 mA maximum external 24 V

Power loss

Approximately 5.8 W

Operating temperature

0 to 60 degrees C

Dimensions / weight

80 x 125 x 120 mm; approximately 600 g

Commercial Term

Quotation

Current price and availability

Payment

T/T or agreed terms

Lead time

Confirmed with quotation

Shipping

DHL, FedEx, UPS or agreed freight

Warranty

12 months

Contact info

CONTACT

Jim Pei

[email protected]

+86 180 2077 6782

FAQ

How can I confirm that 6GK7343-1EX21-0XE0 is compatible with my S7-300 station?

Check the CPU, rack and slot, IM 360/361 connection, external 24 V supply, STEP 7 and NCM version, required communication services and the EX21 hardware entry. Do not install it in an extension rack connected through IM 365.

What should I preserve before replacing 6GK7343-1EX21-0XE0?

Archive the STEP 7 and NCM project, IP and MAC settings, connection tables, PROFINET device list, communication block versions, DHCP method, C-PLUG contents, access-control list and current diagnostics.

Can I move the original C-PLUG into replacement 6GK7343-1EX21-0XE0?

A compatible C-PLUG can retain configuration and CBA interconnections, but both modules must be de-energized and the device type must match. If a new C-PLUG is used, download the required interconnection data again.

Why can 6GK7343-1EX21-0XE0 receive a different IP address after replacement?

The new module has a different factory MAC address, so a DHCP server can assign another address or none. Configure and preserve a DHCP client ID, or restore the approved static or configured MAC method used by the project.

Why can S7 or SEND/RECEIVE communication fail after 6GK7343-1EX21-0XE0 replaces an older CP?

Verify the connection configuration and use block versions approved for the original and replacement CP. For older EX10 or EX11 projects, review AG_SEND, AG_RECV, AG_LOCK and AG_UNLOCK versions before changing network hardware.

How should I diagnose a red SF indication on 6GK7343-1EX21-0XE0 after startup?

Use STEP 7 hardware diagnostics and NCM Diagnostics, then check external 24 V, rack placement, project download and C-PLUG compatibility. An incompatible, missing or faulty C-PLUG can cause the host diagnostic mechanism to signal SF.

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