Technical data
113
PROFIBUS link
Compatible devices: All devices compatible with the PROFIBUS
DP protocol
Size of the link: 127 stations including repeaters (31 stations and
1 repeater per segment)
Medium: Shielded, twisted pair RS-485 cable
• Termination: built in the module
• Specifications:
• Maximum bus length:
Topology: Multi-drop
Serial communication type: Asynchronous, half Duplex
Transfer rate: 9.6 kbit/s, 19.2 kbit/s, 45.45 kbit/s, 93.75 kbit/s,
187.5 kbit/s, 500 kbit/s, 1.5 Mbit/s, 3 Mbit/s, 6 Mbit/s, or 12 Mbit/s
(automatically detected by RPBA-01)
Protocol: PROFIBUS DP
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)
W
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 (m) 1200 1000 400 200 100 100 100
Line B (m) 1200 600 200 – – – –
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