Technical data137PROFIBUS linkCompatible devices: All PROFIBUS-compliant devicesMedium: Shielded twisted pair RS-485 cable (PROFIBUS-approved cable recommended)ï Termination: 220 ohms, or active termination circuitry at eachend of trunk cable (termination not built in the FPBA-01 module)ï Specifications:ï Maximum bus length:Topology: Trunk line, drop lines allowed. Max. 127 nodes withrepeaters (31 nodes + repeater per section)Transfer rate: 12 Mb/s max., automatically detected by theFPBA-01Serial communication type: Asynchronous, half-duplex RS-485Protocol: PROFIBUS DPParameter Line APROFIBUS DPLine BDIN 19245 Part 1 UnitImpedance 135 to 165(3 to 20 MHz)100 to 130(f > 100 kHz)ohmCapacitance < 30 < 60 pF/mResistance < 110 ñ Ω/kmWire gauge > 0.64 > 0.53 mmConductor area > 0.34 > 0.22 mm 2Transfer rate(kbit/s) ≤ 93.75 187.5 500 1500 3000 6000 12000Line A (m) 1200 1000 400 200 100 100 100Line B (m) 1200 600 200 ñ ñ ñ ñ
