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Data transmission properties
RS 485 trans-
Network topology
mission techno-
Linear bus, active bus termination at both ends, spur lines are possible
logy
Medium
Screened twisted-pair cable, must be screened
Number of stations
32 stations in each segment without repeater.
With repeaters can be extended to 127
Max. bus length without repeater
100m at 12 MBit/s. Cable A: 200 m at 1500 KBit/s, up to 1.2 km at 93.75
KBit/s
Max. bus length with repeater
By using repeaters, the maximum bus length can be increased to around 10
km. There should be at least 3 repeaters and, depending on the manufacturer,
there can be up to 10.
Transmission speed
9.6; 19.2: 93.75; 187.5; 500; 1500 KBit/s, up to 12 MBit/s is set automatically
Connector
9-pin D-sub connector
Process data width
Profibus (4,100,231,4,100,233)
Twin Profibus (4,100,403)
Process data format
Motorola
LWL networks
Network topology
Subring
Medium
APF (plastic) fibre (Z1101)
min./max. lengths between two stations
Coordinator - Station:
Station - Station:
Station - coordinator:
Number of stations
93.75 kBaud: 13
Transmission speed
93.75
Switch setting
S1 = 0, S2 = 0
Bus connection
2 x HP Simplex
112 bit (standard configuration)
176 bit (standard configuration)
L ≥ 1 m
L ≤ 34 m
L ≥ 1 m
L ≤ 25 m
L ≥ 0 m
L ≤ 46 m
187.5 kBaud:
500 kBaud: 12
12
187.5
500
S1 = 0, S2 = 0
S1 = 0, S2 = 0
1500 kBaud:
10
1500 KBit/s
S1 = 0, S2 = 0
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