Technical data 181
PROFIBUS link
Compatible devices: All PROFIBUS-compliant devices
Medium: Shielded twisted pair RS-485 cable (PROFIBUS-
approved cable recommended)
• Termination: 220 ohms, or active termination circuitry at each
end of trunk cable (termination not built in the FPBA-01
module)
• Specifications:
• Maximum bus length:
Topology: Trunk line, drop lines allowed. Max. 126 nodes with
repeaters (31 nodes + repeater per section)
Transfer rate: 12 Mb/s max., automatically detected by the
adapter module
Serial communication type: Asynchronous, half-duplex RS-485
Protocol: PROFIBUS DP
Parameter Line A
PROFIBUS DP
Line B
DIN 19245 Part 1
Unit
Impedance 35…165
(3…20 MHz)
100…130
(f > 100 kHz)
ohm
Capacitance < 30 < 60 pF/m
Resistance < 110 – ohm/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) 1200600200––––
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