Features:
- Two point-to-point channels run through separately selected serial interface modules.
- Standard drivers cover 3964(R), ASCII, RK512 and printer communication.
- Loadable drivers extend a channel when the documented device protocol requires one.
The CP handles serial framing while the S7-400 CPU exchanges communication jobs with it.
Interface physics, protocol parameters and cable pinout must describe the same connected device.
Both channels share the documented aggregate communication capacity.
The Siemens 6ES7441-2AA03-0AE0 SIMATIC S7-400 CP 441-2 Communications Module may remain available for quotation and support beyond End-Of-Life (EOL) by the manufacturer (OEM).
Siemens 6ES7441-2AA03-0AE0 CP 441-2 Communications Module Manuals,Datasheets,Link
Important Notice: Other accessories, manuals, cables, calibration data, software, etc. are not included with this equipment unless listed in the above stock item description. All prices are shown in USD.
Matching each serial device to one electrical interface
- Interface slot: Each channel receives the selected RS232C, RS422/485 or TTY module.
- Cable circuit: Connector pinout and shielding follow the installed electrical standard.
- Distance limit: The selected interface physics determines the permitted cable length.
- Device side: The field device must use the same signal levels and duplex arrangement.
Separating serial framing from PLC application data
- Standard driver: The CP executes the selected 3964(R), ASCII, RK512 or printer rules.
- Loadable driver: A documented custom driver adds its protocol-specific framing.
- Job exchange: The PLC submits send or receive work without reproducing every serial character rule.
- Error status: Driver and channel diagnostics identify framing, timeout or interface problems.
Coordinating two channels inside one communications processor
- Aggregate rate: Both serial paths share the documented maximum throughput.
- Parameter memory: Each interface reserves CPU memory-card space for channel settings.
- Text storage: Printer messages use their assigned text area rather than PLC code memory.
- Driver storage: Loadable protocol files require their own retained memory allocation.
Rebuilding the complete channel configuration after replacement
- Hardware catalog: The rack slot and exact CP order number are restored in STEP 7.
- Interface identity: Each plug-in electrical module is recorded with its channel.
- Protocol parameters: Baud, frame, timeout and station settings are loaded per device.
- Functional test: Transmit, receive and diagnostic paths are checked separately on both channels.