Name: Siemens SIMATIC S7-300 CP 340 RS232 Communication Processor 6ES7340-1AH02-0AE0
SKU: 6ES7340-1AH02-0AE0
Price: 234.00 USD
Availability: InStock

Product details

Product Description

The 6ES7340-1AH02-0AE0 is a SIMATIC S7-300 CP 340 Communication Processor. It offers a reliable RS232C (V.24) interface for point-to-point connections. This module connects printers, scanners, and other serial devices to your S7-300 system. It supports ASCII and 3964(R) protocols for flexible data exchange. Power comes directly from the backplane bus, simplifying installation. Its compact design saves valuable space in your control cabinet.

Key Technical Specifications

Brand: Siemens
Model: 6ES7340-1AH02-0AE0
Series: SIMATIC S7-300
Module Type: Communication Processor (CP 340)
Interface: 1 x RS232C (V.24), isolated
Transmission Rate (max): 19.2 kbit/s (3964R), 9.6 kbit/s (ASCII/Printer)
Cable Length (max): 15 meters
Power Supply: via backplane bus 5V DC (no external 24V needed)
Current Draw (max): 165 mA from backplane bus
Power Loss (typ): 0.6 W (max 0.85 W)
Supported Printers: HP-Deskjet, HP-Laserjet, IBM-Proprinter, user-defined
Connector Type: 9-pin Sub-D
Protocols: 3964(R), ASCII (RK512 not supported)
Telegram Length (max): 1024 bytes (both protocols)
Ambient Temperature (op.): 0 °C to 60 °C
Dimensions (WxHxD): 40 x 125 x 120 mm
Weight (approx.): 300 g

Installation & Compatibility

Mounting: Plugs directly into S7-300 backplane bus
Compatibility: Works with all S7-300 CPUs
Configuration: Includes configuration package on CD
Driver Support: Pre-loaded printer drivers (HP, IBM, user-defined)

Application Scenarios

Connecting barcode scanners in logistics
Printer integration for production reports
Serial data exchange with weighing scales
Communication with label printers
Legacy device integration in industrial automation

Expert Review

“The CP 340 is a workhorse for serial communication. Its isolated RS232 port ensures stable data transfer in noisy environments. The 1024-byte telegram length handles most industrial messages. The 3964(R) protocol provides reliable handshaking. For ASCII applications, it’s a simple, cost-effective solution. I recommend it for projects needing robust point-to-point links without complex networking.”

Manager’s Insight

“From a project management view, the CP 340 reduces integration time. The included config package speeds up commissioning. Its compact size lowers cabinet space costs. With a 12-month warranty and global shipping, we ensure minimal downtime. Choose this for straightforward serial tasks—it’s dependable and easy to maintain.”

Shipping & Delivery

Dispatch Time: 12-24 hours from order confirmation
Carriers: FedEx, UPS, DHL (express worldwide)
Warranty: 12 months against manufacturing defects

Package Contents

CP 340 Communication Processor (6ES7340-1AH02-0AE0)
Configuration Package on CD
Quick-start guide (digital)

FAQ – Frequently Asked Questions

Q: What protocols does the CP 340 support?
A: It supports 3964(R) and ASCII. RK512 is not supported.
Q: What is the maximum cable length?
A: The RS232 cable can be up to 15 meters long.
Q: Does it need an external 24V power supply?
A: No. It draws 5V from the S7-300 backplane bus.
Q: Can I use it with a non-Siemens printer?
A: Yes. Use the user-defined printer driver and configure ASCII.
Q: Is the interface electrically isolated?
A: Yes. The RS232 port is isolated for noise immunity.
Q: What is the maximum transmission speed?
A: 19.2 kbit/s with 3964(R), 9.6 kbit/s with ASCII or printer.
Q: What is the typical power loss?
A: Typical loss is 0.6 W, maximum 0.85 W.
Q: Which CPUs are compatible?
A: All S7-300 CPUs with backplane bus support.
Q: How long is the warranty?
A: 12 months from date of purchase.
Q: What’s the shipping weight?
A: Approximately 300 grams.

Selection Guide

Choose CP 340 if: You need a single RS232 port for printers, scanners, or simple serial devices. Your data length is under 1KB per telegram. You prefer a proven, stable solution.
Avoid if: You need RS422/RS485, multiple ports, or high-speed communication (>19.2 kbit/s). For complex networking, consider CP 341 or Ethernet modules.
Best for: Small to medium automation tasks, legacy equipment integration, and cost-sensitive projects.