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Fiber Cable
ST-Port Pinouts
ST-Port to ST-Port Cable Wiring
PROFIBUS Pin Assignment
PIN
Signal Name
1
N.C.
2
N.C.
3
PROFIBUS D+
4
RTS
5
Signal common
6
5 V
7
N.C.
8
PROFIBUS D-
9
N.C.
Federal Communications Commission Statement
This device complies with part 15 of the FCC Rules. Operation is subject to
the following two conditions:
1.
This device may not cause harmful interference, and
2.
This device must accept any interference received, including
interference that may cause undesired operation.
Slot Time Settings
Although ICF-1280I series converters can be connected in different
topologies with a large number of units, the total cable length and
network topology can give rise to frame delays. A sufficient slot time is
required to prevent the PROFIBUS master from timing out. Engineers are
recommended to set the PROFIBUS master’s slot time according to the
following formulas.
For linear and star topologies:
Slot time = A + B × L + 13 × N
Transmission Speed (kbps)
A
B
12000
811
120
6000
461
60
3000
261
30
1500
161
15
500
111
5
187.5
71
1.875
93.75
71
0.9375
45.45
411
0.4545
19.2
71
0.192
9.6
71
0.096
