Siemens 6ES7340-1BH02-0AE0 CP340 Module

Siemens 6ES7340-1BH02-0AE0 20mA TTY CP

Product Introduction

The Siemens 6ES7340-1BH02-0AE0 CP 340 communication processor delivers a robust serial connection for your S7-300 PLC. This module features an isolated 20mA (TTY) interface. Therefore, it performs well in electrically noisy industrial environments. You can achieve transmission rates up to 19.2 kbit/s with the 3964(R) protocol. For ASCII or printer drivers, the maximum speed is 9.6 kbit/s. The 6ES7340-1BH02-0AE0 supports passive cable lengths up to 1000 meters. It also works actively at 100 meters. This flexibility makes it ideal for remote data exchange or connecting legacy serial printers.

Technical Specifications

Power and Energy Data
The 6ES7340-1BH02-0AE0 draws a maximum of 190 mA from the 5 V DC backplane bus. Additionally, its typical power loss is 0.85 W. The maximum power loss reaches 0.95 W. Consequently, it adds very little heat to your control cabinet. This efficiency benefits dense S7-300 configurations.

Communication Interface Details
This module offers one isolated 20mA (TTY) interface. It uses a 9-pin sub D socket for connection. The minimum transmission rate is 2.4 kbit/s. Moreover, the maximum rate with the 3964(R) protocol reaches 19.2 kbit/s. For ASCII protocol and printer drivers, the speed caps at 9.6 kbit/s. The Siemens 6ES7340-1BH02-0AE0 handles telegrams up to 1024 bytes. Supported printers include HP-Deskjet, HP-Laserjet, and IBM-Proprinter. You can also define user-specific printer drivers.

Cable Length and Protocols
Passive operation allows a maximum cable length of 1000 meters. Active operation supports 100 meters. Furthermore, the module includes the 3964(R) protocol for reliable data transmission. Alternatively, you can select the ASCII protocol for simple text exchange. The printer driver mode simplifies connection to industrial label or report printers. Note that RK 512 is not supported. Also, customer-specific drivers cannot be reloaded.

Software and Block Requirements
The FB length in RAM goes up to 2700 bytes. This block handles data communication, sending, and receiving. Therefore, programming remains straightforward in Step 7. You only need to configure the CP 340 once. After that, your PLC program calls the FB to exchange data.

Mechanical and Physical Data

Dimensions
Width is 40 mm. Height is 125 mm. Depth is 120 mm. These dimensions match the standard S7-300 form factor. Consequently, the 6ES7340-1BH02-0AE0 fits into any S7-300 rack without extra space.

Weight
The module weighs approximately 300 g. For shipping, gross weight is 0.45 kg including packaging.

Power Supply
The module does not require an external 24 V DC supply. Instead, it draws power directly from the backplane bus at 5 V DC. This simplifies installation and reduces wiring effort.

Ambient Conditions
Operating temperature ranges from 0°C to 60°C. Storage and transport temperature ranges from -40°C to 70°C. Therefore, the Siemens 6ES7340-1BH02-0AE0 withstands harsh environmental conditions.

Installation Guide

Mounting Steps
First, turn off the S7-300 power supply. Next, snap the Siemens 6ES7340-1BH02-0AE0 onto the DIN rail. Then, push the module into the bus connector until it locks. Finally, tighten the mounting screws.

Wiring the 20mA TTY Interface
Use shielded twisted-pair cables for best noise immunity. For passive transmission, keep the cable within 1000 meters. For active transmission, stay within 100 meters. Connect the transmit and receive lines to the 9-pin sub D socket according to your device manual. Additionally, ensure proper termination resistors if needed.

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 6ES7340-1BH02-0AE0 via the S7-300 backplane.

Packaging List

• One SIMATIC S7-300 CP 340 communication processor (model 6ES7340-1BH02-0AE0)

• One configuration package on CD

• One product information leaflet

Note: The package does not include certificates or warranty documents.

Shipping Information

We ship all orders via FedEx, UPS, or DHL. Delivery typically takes 3 to 7 business days depending on your location.

Frequently Asked Questions (FAQ)

1. What is the main difference between the 6ES7340-1BH00-0AE0 and the 6ES7340-1BH02-0AE0?
The newer 6ES7340-1BH02-0AE0 has lower current consumption at 190 mA versus 220 mA. It also supports a higher maximum transmission rate of 19.2 kbit/s. Additionally, it uses a 9-pin sub D connector instead of a different terminal type.

2. Can the Siemens 6ES7340-1BH02-0AE0 communicate with a modern PC?
Yes, but you need a USB-to-20mA TTY converter. Many industrial USB converters support this interface. Set the same baud rate and protocol on both sides for successful communication.

3. Which protocols does this CP 340 support?
It supports 3964(R), ASCII, and printer drivers. It does not support RK 512. Also, you cannot reload customer-specific drivers. For printers, it works with HP-Deskjet, HP-Laserjet, and IBM-Proprinter.

4. Does this module require an external 24V power supply?
No, it does not. The 6ES7340-1BH02-0AE0 draws all necessary power from the S7-300 backplane bus at 5 V DC. This reduces installation complexity and cabinet space.

5. What is the maximum telegram length for data transmission?
The maximum length is 1024 bytes for both 3964(R) and ASCII protocols. For printer drivers, the length depends on your printer's buffer size. Always check your printer manual for limits.