Siemens 6ES7340-1CH00-0AE0 CP340 Module

Siemens 6ES7340-1CH00-0AE0 RS422/485 CP

Product Introduction

The Siemens 6ES7340-1CH00-0AE0 CP 340 communication processor offers a reliable RS422/485 serial interface for your S7-300 PLC. This module supports long-distance data exchange in industrial environments. However, you should know that Siemens has discontinued this product. The lifecycle ended on October 1st, 2012. Therefore, we recommend using the successor model 6ES7340-1CH02-0AE0 for new projects. For existing systems, the 6ES7340-1CH00-0AE0 remains available while stocks last. This page helps you identify the correct replacement or source legacy parts.

Product Lifecycle Information

Discontinuation Status
This product has reached the end of its lifecycle. The PLM status is PM500, meaning discontinued. Siemens no longer manufactures the 6ES7340-1CH00-0AE0. Technical support may also be limited. Consequently, we strongly advise considering the successor for new designs.

Successor Model
The official replacement is 6ES7340-1CH02-0AE0. This newer version provides the same RS422/485 interface functionality. Additionally, it includes improvements and longer-term availability. Always check the successor's manual for any configuration differences.

Technical Specifications

Power and Energy Data
The Siemens 6ES7340-1CH00-0AE0 draws power from the 5 V DC backplane bus. Exact current consumption is not specified in the official documentation. Typical values are similar to other CP 340 modules around 190-220 mA. Power loss remains low for efficient cabinet cooling.

Communication Interface Details
This module offers one RS422/485 interface. RS422 supports point-to-point connections over long distances. RS485 allows multi-drop networks with up to 32 devices. Therefore, this CP 340 suits applications like connecting multiple drives or remote I/O panels.

Transmission Capabilities
The transmission rate ranges from 2.4 kbit/s up to 19.2 kbit/s. Maximum cable length depends on baud rate and cable quality. For RS422/485, distances up to 1200 meters are possible at lower speeds. The module supports 3964(R) and ASCII protocols. Additionally, it handles telegrams up to 1024 bytes.

Compliance and Physical Data

RoHS Status
Please note that the 6ES7340-1CH00-0AE0 is not RoHS-compliant. Therefore, you cannot use it in applications requiring RoHS certification. The successor model likely meets current environmental standards.

Country of Origin and Weight
This module is made in Germany. Net weight is 0.359 kg. Gross weight for shipping is approximately 0.45 kg including packaging. Packaging dimensions are 13.10 x 15.30 x 5.00 cm.

Commodity and Export Information
Commodity code is 85176200. Export control classification is ECCN N and AL N. Therefore, most international shipments face few restrictions. Factory production time was 1 day when the product was active.

Installation Guide for Legacy Systems

Mounting Steps for Existing Installations
First, turn off the S7-300 power supply completely. Next, remove any existing communication module from the slot. Then, snap the Siemens 6ES7340-1CH00-0AE0 onto the DIN rail. Push the module into the bus connector until it locks securely. Finally, tighten the mounting screws.

Wiring the RS422/485 Interface
Use shielded twisted-pair cables for best noise immunity. For RS422, connect transmit and receive pairs separately. For RS485, connect the data lines and common ground. Additionally, enable termination resistors at both ends of long RS485 cables. This prevents signal reflections and data errors.

Configuration Notes
You need the included configuration package on CD. First, install the driver files into Step 7. Then, assign parameters like baud rate and protocol. After that, download the configuration to the 6ES7340-1CH00-0AE0 via the S7-300 backplane. Save your configuration for future maintenance.

Important Note for System Upgrades

Why You Should Consider the Successor
Siemens discontinued the 6ES7340-1CH00-0AE0 in 2012. Spare parts become harder to find each year. Moreover, software support may not include newer versions of Step 7. The successor 6ES7340-1CH02-0AE0 offers identical functionality with better availability. For critical production lines, planning an upgrade makes good business sense.

Migration Tips
Check your existing configuration before replacing the module. Most parameters transfer directly to the successor. However, always test the new module in a non-production environment first. Keep a backup of your original program. This ensures you can revert if any issues appear.

Frequently Asked Questions (FAQ)

1. Is the Siemens 6ES7340-1CH00-0AE0 still available for purchase?
Siemens discontinued this product on October 1st, 2012. However, we offer remaining stock for legacy system maintenance. For new projects, please use the successor 6ES7340-1CH02-0AE0.

2. What is the difference between RS422 and RS485 on this module?
RS422 supports one transmitter and multiple receivers in a point-to-multipoint setup. RS485 allows multiple transmitters and receivers on the same bus. The 6ES7340-1CH00-0AE0 handles both standards through proper wiring and configuration.

3. Can I still get technical support for this discontinued CP 340?
Siemens no longer provides official support for the 6ES7340-1CH00-0AE0. Our team can offer basic installation guidance. For complex issues, upgrading to the successor is the best long-term solution.

4. Is this module RoHS compliant?
No, it is not. The 6ES7340-1CH00-0AE0 does not meet RoHS requirements. Therefore, you cannot use it in regions or applications that mandate RoHS compliance. The successor model may offer RoHS certification.

5. What protocols does the Siemens 6ES7340-1CH00-0AE0 support?
It supports 3964(R) and ASCII protocols. Maximum telegram length is 1024 bytes. The module does not support RK 512 or reloadable customer-specific drivers. For printer applications, use the TTY version instead.