6ES7340-1AH02-0AE0

Technical specifications

Manufacturer

Siemens

Manufacturer part no.

6ES7340-1AH02-0AE0

Type

Communications processor

Application

Serial point-to-point link for S7-300

Used with

SIMATIC S7-300 rack (S7-300 backplane bus)

Rated value (DC) / 24 V DC

No; Power supply via backplane bus 5V

Input current / from backplane bus 5 V DC, max.

165 mA

Power loss, typ.

0.6 W

Power loss, max.

0.85 W

Interfaces/bus type

RS 232C (V.24)

Number of interfaces

1; Isolated

Interfaces / Transmission rate, min.

2.4 kbit/s

Interfaces / Transmission rate, max.

19.2 kbit/s

Point-to-point connection / Cable length, max.

15 m

Point-to-point connection / supported printers

HP-Deskjet, HP-Laserjet, IBM-Proprinter, user-defined

Point-to-point connection / Connector type

9-pin sub D connector

Point-to-point connection / Integrated protocol driver / 3964 (R)

Yes

Point-to-point connection / Integrated protocol driver / ASCII

Yes

Point-to-point connection / Integrated protocol driver / RK 512

No

Point-to-point connection / Integrated protocol driver / customer-specific drivers reloadable

No

Point-to-point connection / Telegram length, max. / 3964 (R)

1 024 byte

Point-to-point connection / Telegram length, max. / ASCII

1 024 byte

Point-to-point connection / Transmission speed, RS 232 / with 3964 (R) protocol, max.

19.2 kbit/s

Point-to-point connection / Transmission speed, RS 232 / with ASCII protocol, max.

9.6 kbit/s

Point-to-point connection / Transmission speed, RS 232 / with printer driver, max.

9.6 kbit/s

Diagnostics indication LED / Receive RxD

Yes

Diagnostics indication LED / Transmit TxD

Yes

Diagnostics indication LED / Group error SF (red)

Yes

Ambient temperature during operation / min.

0 °C

Ambient temperature during operation / max.

60 °C

Technical documents (1)

• Siemens data sheet 6ES7340-1AH02-0AE0

Key features

• One isolated RS 232C (V.24) interface
• 2.4 to 19.2 kbit/s
• ASCII and 3964(R) protocol drivers
• Discontinued by Siemens on 1 October 2025; spare part only

About the Siemens 6ES7340-1AH02-0AE0

The Siemens 6ES7340-1AH02-0AE0 is the CP 340 point-to-point communications processor with one isolated RS 232C (V.24) interface. Siemens's data sheet gives transmission rates of 2.4 to 19.2 kbit/s and ASCII and 3964(R) protocol drivers. Siemens's data sheet marks it as a spare part. Siemens names no direct successor for the order number; its route forward is migration to the S7-1500 with ET 200MP.

What is the 6ES7340-1AH02-0AE0 used for?

It connects an S7-300 to serial devices such as barcode readers, printers, scales and older controllers.

Lifecycle and successor

Discontinued: product cancellation (Siemens SiePortal), spare part only.

Before you order

What to photograph or confirm so the right unit is quoted.

Check the order number on the module and note the protocol and baud rate set in the STEP 7 project, so the replacement is configured the same way.