6ES7340-1AH01-0AE0 | Siemens CP 340 RS232 Comms Processor

6ES7340-1AH01-0AE0 – CP 340 Communication Processor

SIMATIC S7-300, CP 340 with RS232C (V.24) interface. Includes configuration package on CD. Designed for reliable point-to-point communication in industrial environments.

Key Features

• Compact design – 40 mm width, fits S7-300 rail
• Isolated RS232C interface – protects against ground loops
• Supports 3964(R), ASCII, and printer drivers
• Max telegram length – 1,024 bytes for both protocols
• Low power loss – only 0.85 W

Technical Specifications

• Brand: Siemens
• Model: 6ES7340-1AH01-0AE0
• Series: SIMATIC S7-300, CP 340
• Type: Communication Processor, RS232C (V.24)
• Input current (5 V DC): max. 165 mA
• Power loss: max. 0.85 W
• Transmission rates:
  • 3964(R) protocol: up to 19.2 kbit/s
  • ASCII protocol: up to 9.6 kbit/s
  • Printer driver: up to 9.6 kbit/s
• Cable length: max. 15 m (RS232)
• Telegram length: 1,024 bytes (3964R / ASCII)
• Supported printers: HP-Deskjet, HP-Laserjet, IBM-Proprinter, user-defined
• Block (FB) RAM: max. 2,700 bytes (send/receive)
• Dimensions (W x H x D): 40 x 125 x 120 mm
• Weight: approx. 300 g
• Isolation: 1 interface, fully isolated

Environmental & Compliance

• Ambient temperature (operation): 0 °C to +60 °C
• Storage temperature: -40 °C to +70 °C
• Relative humidity: ≤ 95 % (non-condensing)
• Protection class: IP20 (front panel)
• EMC immunity: EN 61000-6-2, industrial environment
• Certification: CE, cULus, ATEX (Zone 2) – pending

Installation & Commissioning

• Snap onto S7-300 mounting rail – no tools required
• Connect RS232 cable to 9-pin D-sub (max. 15 m)
• Configure via CP 340 config package on CD (included)
• Use FB blocks (send/receive) for data exchange
• LED indicators for status and fault diagnostics

Maintenance & Service

• Firmware update via configuration software
• No regular maintenance – passive cooling design
• Diagnostics buffer stores last 100 events
• Replaceable fuse (internal, 1 A slow-blow)

Compatibility

• Works with all S7-300 CPUs (e.g., 315, 317, 319)
• Supports STEP 7 V5.5 or later (TIA Portal optional)
• Compatible with 3964(R) and ASCII-based devices
• Printer drivers for HP, IBM, and custom protocols

Package Contents

• 1x CP 340 communication processor (6ES7340-1AH01-0AE0)
• 1x Configuration package on CD (manuals, drivers, samples)
• 1x Product information leaflet
• 1x Mounting clip (pre-installed)

Warranty & Shipping

• Warranty: 12 months from date of invoice
• Shipping: 12–24 hours dispatch (stock depending)
• Carriers: FedEx, UPS, DHL (tracked & insured)

Expert Review – “Manager’s Insight”

Reliable workhorse for serial communication. The CP 340 offers stable RS232 connectivity for legacy printers, barcode scanners, and weigh scales. Its isolated interface prevents noise issues in harsh plants. For new projects, we recommend the CP 341 for higher speeds, but the 340 remains a cost-effective choice for 19.2 kbps applications. Easy to configure, robust, and Siemens-quality.

Typical Applications

• Printer connectivity (HP, IBM, custom) in production lines
• Barcode scanner or RFID reader integration
• Weighing scale data acquisition
• Legacy machine communication (RS232)
• Remote terminal unit (RTU) polling

Frequently Asked Questions (FAQ)

• What is the maximum cable length?

  15 meters (RS232). Use shielded cable for longer runs.

• Can I use this with TIA Portal?

  Yes, but requires HSP (Hardware Support Package) installation.

• Does it support 3964(R) with CRC?

  Yes, 3964(R) includes block check characters (BCC).

• Is the interface electrically isolated?

  Yes, the RS232 port is isolated up to 500 V DC.

• Can I connect a modem?

  Yes, using ASCII protocol with Hayes commands.

Expert FAQ – Experience & Selection Guide

• Which printer driver should I choose?

  Select HP-Deskjet for PCL3, HP-Laserjet for PCL5, or IBM-Proprinter for Epson emulation.

• My barcode scanner sends variable length data – any issue?

  No, ASCII mode supports variable telegram lengths up to 1024 bytes.

• What if I need higher speed than 19.2 kbps?

  Consider CP 341 (up to 115.2 kbps) or CP 440 for PROFIBUS.

• How do I update the firmware?

  Use the configuration software on CD and follow the update wizard.

Selection Guide – Which CP 340 for my task?

• Printing: Choose CP 340 (this model) – supports HP/IBM drivers.
• ASCII sensors: Ideal for weigh scales, barcode readers.
• 3964(R) legacy: Perfect for older Siemens drives or RTUs.
• RS232 only: If you need RS422/485, check CP 341.
• Budget-conscious: CP 340 offers best value for 19.2 kbps.

For technical inquiries or bulk orders, contact us:
sales@powergearx.com | +86 18030005825 (WhatsApp)

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