Technical Specifications
A.1 Technical Specifications of the CP 341
CP 341 Point-to-Point Communication, Installation and Parameter Assignment
214 Manual, 09/2008, A5E02191071-01
Technical specifications
Transmission rate with ASCII driver 300, 600, 1200, 2400, 4800, 9600, 19200, 38400,
57600, 76800, 115200 bps
Transmission rate with printer driver 300, 600, 1200, 2400, 4800, 9600, 19200, 38400,
57600, 76800, 115200 bps
Character frame
• No. of bits per character (7 or 8)
• No. of start/stop bits (1 or 2)
• Parity (none, even, odd)
Quantity of user data transported per program
cycle
Send/receive: 32 bytes
Memory requirement of FB P_SND_RK and FB
P_RCV_RK (RAM)
Approx. 5500 bytes
Technical specifications for the RS 232C interface
The table below shows the technical specifications for the RS 232C interface of the CP 341–
RS 232C:
Table A- 2 Technical specifications of the RS 232C interface
Technical specifications
Interface RS 232C, 9-pin sub D male connector
RS 232C signals TXD, RXD, RTS, CTS, DTR, DSR, RI, DCD, GND
All electrically isolated relative to the S7-internal supply
(backplane bus) and the external 24 V DC supply
Max. transmission distance 15 m
Max. baud rate 115200 baud
Technical specifications for the 20mA-TTY interface
The table below shows the technical specifications for the 20-mA-TTY interface of the
CP 341-20mA-TTY:
Table A- 3 Technical specifications for the 20mA-TTY interface
Technical specifications
Interface 20 mA current loop TTY, 9-pin sub D female connector
TTY signals Two isolated 20 mA current sources,
receive loop (RX) "–" and "+" send loop (TX) "–" and "+"
All electrically isolated relative to the S7-internal supply (backplane
bus) and the external 24 V DC supply
Max. transmission distance 1000 m active, 1000 m passive
Max. baud rate 19200 baud
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