SIMATIC S7-300 · Serial Communication
6ES7340-1CH02-0AE0
CP 340 communications processor with one isolated RS-422/485 interface
Interface profile
RS-422 / RS-485
15-pin Sub-D · 2.4 to 19.2 kbit/s
The Siemens 6ES7340-1CH02-0AE0 is a SIMATIC S7-300 CP 340 communications processor for serial point-to-point data exchange. Its single isolated interface supports RS-422 and RS-485 electrical standards through a 15-pin Sub-D socket.
The module is powered from the S7-300 backplane bus and includes integrated ASCII, 3964(R), and printer protocol drivers. The official Siemens data sheet identifies the article as a spare part and states that the configuration package is supplied on CD.
Procurement Snapshot
Family: SIMATIC S7-300
Module: CP 340
Interface: RS-422/485
Origin: Germany
| Status field |
Officially supported statement |
| Lifecycle |
Product Cancellation |
| Effective date |
2025-10-01 for the SIMATIC S7-300 family milestone; the exact article is identified as a spare part in the current Siemens data sheet. |
| Successor |
No article-specific successor was confirmed in the accessible official source. |
| Supply approach |
Request exact article-number, revision, condition, accessory, warranty and system-compatibility verification. |
03
Verified Technical Data
| Parameter |
Official specification |
Procurement significance |
| Product type |
CP 340 communications processor |
Match CP 340, not CP 341 or another interface version. |
| Serial interface |
1 isolated RS-422/485 (X.27) |
Confirm electrical mode and pinout. |
| Connector |
15-pin Sub-D socket |
Verify cable gender and wiring. |
| Transmission rate |
2.4 to 19.2 kbit/s |
Match partner-device settings. |
| Integrated protocols |
3964(R), ASCII and printer driver; RK 512 not supported |
Confirm the required framing and driver. |
| Telegram length |
Up to 1,024 bytes for 3964(R) and ASCII |
Check application payload length. |
| Maximum cable length |
1,200 m |
Validate topology and termination. |
| Backplane load |
5 V DC, maximum 165 mA |
Powered through the S7-300 backplane bus. |
| Power loss |
0.6 W typical; 0.85 W maximum |
Use for cabinet thermal review. |
| Size and weight |
40 × 125 × 120 mm; approximately 300 g |
Check rack width and shipping record. |
| Operating temperature |
0 to 60 °C |
Confirm enclosure conditions. |
04
System Fit and Applications
Machine and device links
Connect serial controllers, measuring devices, barcode systems or other compatible RS-422/485 partners to an S7-300 station.
ASCII and 3964(R) exchange
Handle framed point-to-point telegrams when partner settings, cable design and application blocks are correctly engineered.
Legacy S7-300 maintenance
Maintain an installed CP 340 interface while preserving the validated hardware configuration, serial parameters and program blocks.
05
Compatibility and Procurement Checks
1. Article identity
Confirm the complete 6ES7340-1CH02-0AE0 number and hardware revision.
2. Interface wiring
Check RS-422 or RS-485 mode, 15-pin Sub-D pinout, shield and termination.
3. Protocol project
Verify baud rate, character frame, ASCII or 3964(R) settings and application blocks.
4. Supply scope
Confirm module condition, configuration package, connector/cable scope and warranty terms.
Siemens identifies 6ES7340-1CH02-0AE0 as a spare part. The official S7-300 lifecycle notice states that Product Cancellation took effect on 2025-10-01 and that components are then available only as spare parts, planned until 2033. No article-specific successor was confirmed in the accessible source.
07
Frequently Asked Questions
What is the Siemens 6ES7340-1CH02-0AE0?
It is a SIMATIC S7-300 CP 340 communications processor with one isolated RS-422/485 interface.
Which protocols are integrated?
The official data sheet lists 3964(R), ASCII and printer drivers. RK 512 and reloadable customer-specific drivers are not supported.
Does the module need a separate 24 V DC supply?
No. Siemens specifies power via the 5 V S7-300 backplane bus, with a maximum current of 165 mA.
Can any RS-485 device be connected without engineering?
No. Electrical mode, cable pinout, termination, baud rate, character framing and application protocol must all match.
What information should accompany a quotation?
Provide the complete article number, hardware revision, installed CPU/rack, protocol settings, required quantity, condition and delivery destination.
Need 6ES7340-1CH02-0AE0?
Request stock verification, serial-interface compatibility review, global delivery options and warranty details.
Send Your Enquiry
Product Enquiry
Request a Quote for 6ES7340-1CH02-0AE0
Send the complete part number, quantity, required condition, installed S7-300 system and delivery destination.
