Siemens 6ES7340-1CH02-0AE0 SIMATIC S7-300 CP 340 RS422/485 Communication Processor

Overview

SIMATIC S7-300 • SERIAL COMMUNICATION

6ES7340-1CH02-0AE0 SIMATIC S7-300 CP 340 RS422/485 Communication Processor

CP 340 processor with an isolated RS422/485 interface for ASCII, 3964(R) and printer communication.

At a Glance

Brand	Siemens
Model	6ES7340-1CH02-0AE0
Product Type	Communication processor
Core Function	RS422/485 point-to-point link
Compatible Series	SIMATIC S7-300

Isolated serial channel

A single isolated channel connects through a 15-pin Sub-D socket.

Built-in protocol drivers

ASCII, 3964(R) and printer drivers are integrated into the processor firmware.

Long serial runs

The interface permits cable runs up to 1,200 m within the specified installation conditions.

Product Overview

6ES7340-1CH02-0AE0 provides the CP 340 RS422/485 serial interface for an S7-300 station. It exchanges data with a compatible serial partner through an electrically isolated X.27 interface.

Integrated ASCII, 3964(R) and printer drivers support different telegram formats without treating all serial protocols as interchangeable. The module receives its operating power through the 5 V backplane bus.

Ordering focus: Match the partner’s RS422 or RS485 wiring, protocol and telegram timing before selecting the channel parameters.

Key Functions

Serial partner integration

Connects controllers, computers or suitable serial devices through the isolated RS422/485 channel.

Protocol-based telegram handling

3964(R) permits up to 19.2 kbit/s, while the ASCII and printer drivers permit up to 9.6 kbit/s.

Printer output

Integrated printer support includes HP Deskjet, HP Laserjet, IBM Proprinter and user-defined printer settings.

Official Specifications

Operating power source	5 V DC backplane bus
Maximum backplane current	165 mA
Power loss	0.6 W typical; 0.85 W maximum
Serial channel and connector	1 isolated channel with 15-pin Sub-D socket
Maximum 3964(R) transmission rate	19.2 kbit/s
Maximum ASCII and printer rate	9.6 kbit/s
Maximum ASCII and 3964(R) telegram length	1,024 bytes
Maximum serial cable length	1,200 m
Operating ambient temperature	0–60 °C
Storage and transport temperature	−40–70 °C

Official source:Siemens technical data sheet.

Frequently Asked Questions

How do I choose the serial partner for 6ES7340-1CH02-0AE0?

The partner must use compatible RS422 or RS485 electrical wiring and an ASCII, 3964(R) or printer communication format.

Can I run ASCII at 19.2 kbit/s with 6ES7340-1CH02-0AE0?

The ASCII driver is limited to 9.6 kbit/s, whereas 19.2 kbit/s is available with 3964(R).

Which cable connector fits 6ES7340-1CH02-0AE0?

The serial interface uses a 15-pin Sub-D socket.

How large may one telegram be on 6ES7340-1CH02-0AE0?

An ASCII or 3964(R) telegram can contain up to 1,024 bytes.

Can I load a different protocol driver into 6ES7340-1CH02-0AE0?

The processor does not support reloading customer-specific protocol drivers.

Must I wire an external 24 V supply to 6ES7340-1CH02-0AE0?

The processor is supplied from the 5 V backplane bus and draws up to 165 mA.

Can 6ES7340-1CH02-0AE0 send messages directly to an industrial printer?

Its integrated printer driver supports HP Deskjet, HP Laserjet, IBM Proprinter and user-defined printer settings.

Compatibility & Ordering Notes

Before ordering 6ES7340-1CH02-0AE0: Use the RS422/485 CP 340 variant for an S7-300 slot and match the 15-pin connector, electrical mode, driver and partner settings.

Serial link commissioning

• Choose RS422 or RS485 wiring for the actual partner interface.
• Keep ASCII and printer operation at 9.6 kbit/s or below.
• Use up to 19.2 kbit/s only with the appropriate 3964(R) configuration.
• Include the 165 mA maximum module current in the 5 V backplane budget.

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