Appendix C – Technical Data
C-2 NPBA-12 Installation and Start-up Guide
Fieldbus Link
Compatible Devices: All devices compatible with the PROFIBUS-DP
and PROFIBUS-DPV1 protocols
Size of the Link: 127 stations including repeaters (31 stations and 1
repeater per segment)
Medium: Shielded, twisted pair RS485 cable
• Termination: built in the NPBA-12 Module
• Specifications:
• Maximum Bus Length (m):
Topology: Multi-drop
Serial Communication Type: Asynchronous, half Duplex
Transfer Rate: 9.6, 19.2, 44.45, 93.75, 187.5, 500, 1500, 3000, 6000,
or 12000 kbit/s
Protocol: PROFIBUS-DP, PROFIBUS-DPV1
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
Transfer Rate (kbit/s)
≤ 93.75 187.5 500 1500 3000 6000 12000
Line A 1200 1000 400 200 100 100 100
Line B 1200 600 200 ––––
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