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Appendix C – Technical Data
C-2
Installation and Start-up Guide for NPBA-01
Fieldbus Link
Compatible Devices: All devices compatible with the PROFIBUS-DP
and PROFIBUS-FMS protocols
Size of the Link: 127 stations with repeaters (32 stations per segment)
Topology: Linear bus
Serial Communication Type: Asynchronous, half Duplex
Transmission Rate: 9.6, 19.2, 93.75, 187.5, 300 or 1500 kbit/s
Protocol: PROFIBUS-DP or PROFIBUS-FMS
Cable: Shielded, twisted pair RS485 cable
•
Termination: built in the NPBA-01 Module
•
Specifications:
•
Maximum Bus Length (m):
Parameter
Line A
PROFIBUS-DP
Line B
DIN 19245 Part 1
Unit
Impedance
135 to 165
(3 to 20 MHz)
100 to 130
(f > 100 kHz)
Ω
Capacitance
< 30
< 60
pF/m
Resistance
< 110
–
Ω
/km
Wire gauge
> 0.64
> 0.53
mm
Conductor area
> 0.34
> 0.22
mm
2
Transmission rate (kbit/s)
≤
93.75
187.5
500
1500
Line A
1200
1000
400
200
Line B
1200
600
200
–