Protective Measures Against Faults On The Line - Siemens SIMATIC S5 CP 521 Manual

Hardware Installation CP 521
3.4

Protective Measures Against Faults on the Line

Please note the cable length to ensure trouble-free data transfer.
TTY interface
Note voltage drops along the cable and the send and receive elements of the
module ( 2.2)
RS-232-C (V.24) interface
Cable lengths up to 15 m are not critical. Note the loading capacity in the case of
longer cables. As a general rule, longer cables can be used by reducing the baud
rate.
3-4
GWA 4NEB 812 6030-02b