6ES7441-1AA03-0AE0 CP 441-1 Point-to-Point Module | S7-400 38.4kbps

Product Overview

• Siemens 6ES7441-1AA03-0AE0 – point-to-point communication module for SIMATIC S7-400 systems
  • Offers 1 configurable serial channel for flexible device connectivity
  • Supports RS232, RS422/485, and 20mA TTY interface types
  • Transmits data at up to 38.4 kbps with multiple protocol options
  • Ideal for connecting printers, barcode readers, and legacy serial instruments

Technical Specifications – Hierarchical View

• General information
  • Brand: Siemens
  • Model: 6ES7441-1AA03-0AE0
  • Series: SIMATIC S7-400
  • Product type: CP 441-1 Communications Module
  • Weight: approx. 720 g (interface module +100 g)
  • Dimensions: 25 x 290 x 210 mm (W x H x D)
• Power supply
  • 5 V DC: required (from backplane bus)
  • 24 V DC: required (for interface module)
  • Backplane current draw: max. 700 mA at 5 V
  • Interface module consumption: 300 mA at 5 V
  • 20mA TTY interface: additional 45 mA at 24 V
• Interface types (field-selectable)
  • RS232C (V.24) – cable length max 10 m
  • RS422/485 (X.27) – cable length max 1200 m
  • 20mA TTY – cable length max 1000 m
  • One channel, configurable for any interface type
• Protocol support
  • 3964(R) – Siemens standard for point-to-point
  • ASCII – free protocol for custom devices
  • Printer driver – HP LaserJet, DeskJet, IBM Proprinter
  • User-defined protocols also supported
• Transmission speeds
  • RS232: max 38.4 kbps (all protocols)
  • RS422/485: max 38.4 kbps (all protocols)
  • 20mA TTY: max 19.2 kbps (3964R/ASCII/Printer)
• Memory & connections
  • Memory for parameters: 1-5 KB
  • Memory for message texts: 0-55 KB
  • Max connections: 8 simultaneous
  • S7 extended communication: supported

Expert Review – Engineer’s Insight

• This module solves a common problem: connecting non-Siemens devices to S7-400 systems. One channel handles most serial tasks effectively.
• The 38.4 kbps speed works well for printers and simple instruments. For high-speed data logging, consider CP 441-2 with 115.2 kbps.
• 20mA TTY remains useful for older weigh scales and barcode readers. Many plants still operate this legacy equipment.
• Configuration via STEP 7 is straightforward. The CD includes parameter assignment forms for quick setup.

Compatible Devices & Applications

• Works with all SIMATIC S7-400 CPUs (standard and redundant systems)
• Printers: HP LaserJet, DeskJet, IBM Proprinter, and custom drivers
• Measurement instruments: scales, analyzers, barcode scanners
• Legacy serial devices: 20mA TTY terminals, RS232/422 industrial instruments
• Typical industries: manufacturing, logistics, chemical, food & beverage

Installation & Configuration Guide

• Installation steps
  • Mount CP 441-1 in S7-400 rack (U-bus connector required)
  • Select interface module (RS232, RS422/485, or 20mA TTY)
  • Install interface module onto the CP 441-1 base unit
  • Connect 24 V DC supply for interface module
  • Wire serial cable to your device (observe pinout)
• Configuration tips
  • Use STEP 7 for parameter assignment (CD included)
  • Select protocol: 3964R, ASCII, or printer driver
  • Set baud rate matching your target device
  • Test communication with simple send/receive functions
• Cable recommendations
  • RS232: keep under 10 m (use shielded cable)
  • RS422/485: up to 1200 m (twisted-pair, shielded)
  • 20mA TTY: up to 1000 m (use proper termination)

Package Contents

• 1x Siemens 6ES7441-1AA03-0AE0 CP 441-1 base module
• 1x Configuration software CD
• Interface module sold separately (select RS232, RS422/485, or 20mA TTY)

Shipping & Warranty

• 12-month warranty against manufacturing defects
• Shipping: FedEx, UPS, DHL (calculated at checkout)
• Orders dispatch within 12-24 hours on business days

Comparison – CP 441-1 vs CP 441-2

• 6ES7441-1AA03-0AE0 (CP 441-1) – 1 channel, 38.4 kbps max, basic point-to-point communication
• 6ES7441-2AA03-0AE0 (CP 441-2) – 2 channels, 115.2 kbps max, enhanced diagnostics, more protocols
• Choose CP 441-1 for single-device connections with moderate speed requirements
• Choose CP 441-2 for multi-device setups or high-speed data transfer

Frequently Asked Questions

• Q: Can I use this module with a barcode scanner?
  • A: Yes. Configure ASCII protocol with matching baud rate and data format. The module reads scanner data directly.
• Q: What interface module do I need for RS232?
  • A: Order the RS232C (V.24) interface module separately. The CP 441-1 base does not include it.
• Q: Why is 20mA TTY limited to 19.2 kbps?
  • A: This is a hardware limitation of the TTY interface. For higher speeds, use RS232 or RS422/485.
• Q: Does this module support MODBUS RTU?
  • A: Not directly. You can use ASCII protocol to implement MODBUS RTU with custom programming.
• Q: Can I connect a weighing scale to the CP 441-1?
  • A: Yes. Most industrial scales output ASCII data over RS232. Match the baud rate and configure ASCII driver.

Buying Guide – Selection Advice

• Choose 6ES7441-1AA03-0AE0 for single serial device connections up to 38.4 kbps.
• Need two channels or higher speed? Select CP 441-2 (6ES7441-2AA03-0AE0).
• Verify your target device’s interface type: RS232, RS422/485, or 20mA TTY.
• Order the corresponding interface module together with the CP 441-1 base.
• Check cable length requirements before installation – 20mA TTY supports 1000m.

Contact & Support

• Email: sales@powergearx.com
• WhatsApp: +86 18030005825 (click to chat)

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