Siemens CP 341 communications processor, model 6ES7 341-1AH02-0AE0, attaches to SIMATIC S7-300 controllers to provide a dedicated RS-232C (V.24) serial interface for point-to-point data exchange. It supports data transmission up to 115.2 kbaud in half-duplex mode and ships with a configuration package on CD-ROM to facilitate setup; the RS232C interface is explicitly listed as the CP 341 RS232C option in Siemens catalogs. This CP 341 variant (order number 6ES7341-1AH02-0AE0) enables straightforward serial communication with external devices and is compatible with S7-300/S7-300F installations.
