MBP cable type and speed Section 2 Transmission Technology
34 3BDS009029R5001 B
The bus trunk cable has a passive line terminator at each end.
Table 4. Basic data for the PROFIBUS PA reference cable
Parameter PA, Cable type A
Cable design shielded twisted pair
Conductor cross section (nominal) 0,8 mm²
Loop resistor (direct current)
44 Ohm/km
Wave resistance at 31,25 kHz 100 Ohm +
20%
Wave attenuation at 39 kHz 3 dB/km
Capacitive asymmetry 2 nF/km
Group runtime distortion (7,9 ... 39) kHz 1,7 µs
Covering level of the shield 90%
The Power Link Modules of the PROFIBUS Linking Device LD 800P possess an
integrated bus terminator, which terminates the PROFIBUS PA line unilaterally
and therefore eliminates the need for a separate bus terminator on the Power Link
Modules. (see also PROFIBUS DP/PA Linking Device LD 800P on page 40
To Next Page
Loading...
