6ES7441-1AA04-0AE0 1-Channel CP 441-1 Siemens

Introduction to the 6ES7441-1AA04-0AE0 Communications Module

When point-to-point connectivity demands reliability, the 6ES7441-1AA04-0AE0 from Siemens delivers a robust solution. This SIMATIC S7-400 CP 441-1 communications module supports one variable interface, enabling flexible integration into existing automation architectures. With support for 20 mA (TTY), RS 232C (V.24), and RS 422/485 (X.27) physical standards, it adapts to diverse industrial environments. The module includes a configuration package on CD, simplifying initial setup. For engineers managing serial communication, this module offers a dependable, cost-effective pathway.

Key Features and Technical Specifications

The 6ES7441-1AA04-0AE0 is engineered for performance and versatility. Below are the core specifications extracted from the official datasheet:

• Supply Voltage: Rated at 5 V DC and 24 V DC.
• Input Current from Backplane Bus: Max 600 mA at 5 V DC (without interface module).
• Interface Module Power Consumption: 20 mA (TTY) draws 100 mA from 5 V and 45 mA from 24 V; RS 422/485 draws 250 mA from 5 V; RS 232C draws 100 mA from 5 V.
• Power Loss: Typically 0.3 W.
• Memory Requirements: 1 to 5 KB for parameters, 0 to 55 KB for message texts per interface on the S7-CPU memory card.
• Number of Interfaces: 1, variable.
• Interface Physics: Supports 20 mA (TTY), RS 232C (V.24), and RS 422/485 (X.27).
• Cable Lengths (shielded): 20 mA (TTY) up to 1000 m; RS 232 up to 10 m; RS 422/485 up to 1200 m.
• Transmission Rate: Max 38.4 kbit/s.
• Supported Printers: HP-Deskjet, HP-Laserjet, IBM-Proprinter, user-defined.
• Integrated Protocol Drivers: 3964 (R), ASCII, Printer; RK512 not supported; customer-specific drivers not reloadable.
• Transmission Rates by Protocol: 20 mA (TTY) max 19.2 kbit/s; RS 422/485 max 38.4 kbit/s; RS 232 max 38.4 kbit/s.
• Configuration Software: STEP 7 with own parameter assignment forms.
• Dimensions: Width 25 mm, Height 290 mm, Depth 210 mm.
• Weight: Approx. 800 g; interface module 100 g.

One distinctive feature is the variable interface, which allows the same module to handle TTY, RS 232, or RS 422/485 without hardware changes. This flexibility reduces inventory costs and simplifies spares management, directly impacting your bottom line.

Applications and Use Cases

In manufacturing plants, the 6ES7441-1AA04-0AE0 is used for connecting S7-400 PLCs to serial devices such as barcode scanners, weigh scales, and printers. For example, a packaging line can use the RS 422/485 interface to communicate over long distances (up to 1200 m) with remote I/O stations, minimizing signal degradation. Additionally, the printer driver support enables direct label printing without extra converters. Because the module supports multiple protocols, it serves as an universal bridge, reducing the need for multiple communication cards and lowering overall system cost.

Installation and Setup

Mounting the 6ES7441-1AA04-0AE0 is straightforward: insert it into an S7-400 backplane slot. Ensure the backplane bus provides 5 V DC and that the total current draw (max 600 mA) stays within the power budget. For interface modules, verify the specific current requirements (e.g., 250 mA for RS 422/485 from 5 V). Use shielded cables with lengths respecting the limits: 1000 m for TTY, 10 m for RS 232, and 1200 m for RS 422/485. Configure the module using STEP 7 with the included parameter assignment forms. Always follow the installation manual to avoid wiring errors that could damage the module.

Maintenance and Reliability

To maintain long-term reliability, periodically inspect the module for dust accumulation and ensure proper ventilation. Check that all cable connections are secure and that shielding is intact to prevent electromagnetic interference. Since the module has no moving parts, routine maintenance is minimal, but verifying the power supply stability is essential. A stable 5 V and 24 V supply reduces the risk of communication errors. By adhering to these simple practices, you extend the module's service life and avoid costly downtime.

Compatibility and Integration

The 6ES7441-1AA04-0AE0It supports the 3964 (R) and ASCII protocols, which are common in industrial serial communication. The module also drives standard printers, making it versatile for reporting tasks. However, note that RK512 is not supported, and customer-specific drivers cannot be reloaded. For systems requiring these features, consider alternative modules. The included configuration package on CD simplifies integration with STEP 7, reducing setup time and engineering costs.

Troubleshooting Common Issues

If communication fails, first check the physical interface selection and cable wiring. For RS 232, keep cable length under 10 m; for RS 422/485, ensure proper termination and grounding. Verify that the transmission rate matches the connected device's settings—the module supports up to 38.4 kbit/s, but TTY is limited to 19.2 kbit/s. Also, confirm that the interface module's power consumption does not exceed the backplane supply. If issues persist, consult the official Siemens documentation or contact AutoDCSTech for technical support.

Product Support and Availability

The 6ES7441-1AA04-0AE0 is available from AutoDCSTech, an industrial automation parts supplier. We keep this module in stock and ready to ship. For pricing and delivery details, contact our sales team. Please verify current lifecycle status and availability with AutoDCSTech before ordering.