Product Introduction
The Siemens 6ES7441-1AA03-0AE0 CP 441-1 Communications Module is a single-channel point-to-point interface for SIMATIC S7-400 systems. With support for RS 232C, RS 422/485, and 20 mA (TTY) physical interfaces, this Siemens module provides flexible connectivity to serial devices, printers, and legacy equipment. It includes a configuration package on CD and requires STEP 7 for setup.
Technical Specifications
Below are the key technical parameters for the Siemens 6ES7441-1AA03-0AE0 module, sourced directly from the manufacturer:
| Parameter |
Value |
| Supply voltage (5 V DC) |
Yes |
| Supply voltage (24 V DC) |
Yes |
| Input current from backplane bus (5 V DC, max.) |
700 mA (without interface module) |
| Interface module power consumption (20 mA TTY) |
300 mA at 5 V, 45 mA at 24 V |
| Interface module power consumption (RS 422/485) |
300 mA at 5 V |
| Interface module power consumption (RS 232C) |
300 mA at 5 V |
| Memory requirements per interface |
1 to 5 KB for parameters; 0 to 55 KB for message texts |
| Number of interfaces |
1 (variable) |
| Interface physics (20 mA TTY) |
Yes |
| Interface physics (RS 232C) |
Yes |
| Interface physics (RS 422/485) |
Yes |
| Max cable length (20 mA TTY, shielded) |
1000 m |
| Max cable length (RS 232, shielded) |
10 m |
| Max cable length (RS 422/485, shielded) |
1200 m |
| Max transmission rate |
38.4 kbit/s |
| Supported printers |
HP-Deskjet, HP-Laserjet, IBM-Proprinter, user-defined |
| Integrated protocol drivers |
3964(R), ASCII, Printer |
| S7 extended communication |
Yes |
| Number of connections (overall) |
8 |
| Configuration software |
STEP 7 (own parameter assignment forms) |
| Width |
25 mm |
| Height |
290 mm |
| Depth |
210 mm |
| Weight (approx.) |
720 g (interface module: 100 g) |
Real-World Applications
-
Printer Integration: Connect S7-400 controllers to HP or IBM printers for real-time report generation. The Siemens 6ES7441-1AA03-0AE0 supports printer drivers up to 38.4 kbit/s over RS 232 or RS 422/485.
-
Serial Device Communication: Interface barcode scanners, weigh scales, or legacy terminals using ASCII or 3964(R) protocols. The module handles distances up to 1200 m with RS 422/485.
-
Legacy System Upgrade: Replace older CP 441 modules to gain improved protocol support and maintain compatibility with existing S7-400 hardware.
Installation & Setup Guidance
Install the Siemens 6ES7441-1AA03-0AE0 module into a free slot of an S7-400 rack. Connect the appropriate interface module (20 mA TTY, RS 232C, or RS 422/485) as needed. Use STEP 7 V5.x or higher to configure the module via the provided parameter assignment forms. Set transmission rate, protocol, and printer parameters before commissioning. Observe cable length limits to ensure reliable communication.
Compatibility & Integration
This Siemens 6ES7441-1AA03-0AE0 module integrates seamlessly with SIMATIC S7-400 CPUs. It supports S7 extended communication and can manage up to eight connections. The module works with STEP 7 configuration software and is compatible with the 3964(R), ASCII, and printer protocols. Use it to link controllers to serial peripherals or third-party devices.
Selection Guide & Purchasing Advice
Before ordering the Siemens 6ES7441-1AA03-0AE0, verify your S7-400 CPU firmware level and available rack space. Select the correct interface module (20 mA TTY, RS 232C, or RS 422/485) for your serial device. For reliable supply, purchase from trusted sources like PLC Source PRO (visit ubest101.myshopify.com). Ensure you have STEP 7 software for configuration.