GD310-UL series VFD
Expansion card
-215-
Repeater
Up to 32 stations can be connected to each segment (master station or subsidiary stations), the
repeater have to be used when stations is more than 32. The repeaters in series are generally no
more than 3.
Note:
There is no repeater station address.
Terminal
Repeater
Repeater
A.2.6.4 Transmission rate and maximum distance
Maximum length of cable depends on the transmission rate. The Table below shows the relationship
between transmission rate and distance.
Transmission rate (kbps)
A-wire (m)
B-wire (m)
9.6
1200
1200
19.2
1200
1200
93.75
1200
1200
187.5
1000
600
500
400
200
1500
200
-----
12000
100
-----
Transmission line parameters:
Transmission rate (kbps)
A-wire (m)
B-wire (m)
Impedance (Ω)
135
–165
100
–130
Capacitance per unit length (pF/m)
< 30
< 60
Loop Resistance (Ω/km)
110
--------
Core wire diameter (mm)
0.64
> 0.53
Line-core cross-section (mm
2
)
> 0.34
> 0.22
Besides shielding twisted-pair copper wires, PROFIBUS can also use optical fiber for transmission in
an electromagnetic interference environment to increase the high-speed transmission distance there
are two kinds of fiber optical conductors, one is low-cost plastic fiber conductor, used distance is less
than 50 meters, the other is glass fiber conductor, and used distance is less than 1kM.
Содержание GD310-011P-4-UL
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