Safety Bus


Safety Bus is an open Fieldbus system based on well established CAN Bus technology. Safety Bus modules must be self monitoring, perform intelligent checks and reactions independently and therefore remain "safe".Several versions of Safety Bus cables are available depending on the application and environmental conditions. The transnission rate is up to 500 Kbit/s.


  Safety Bus
Area of Application Fixed Installation, Indoor
Cable Construction 3x0.75 mm2 (stranded)
Inner Conductor Diameter Copper, bare (AWG 18/24)
Conductor Insulation Foamed PP with a hard skin
Conductor Colors white, brown, green
Stranding Element Triple conductor
Wrapping Polyester foil over stranded bundle
Total Shielding Copper braid, tinned
Outer Jacket Material FRNC/PUR/PVC/LSHF
Outer Diameter 7.5 mm ± 0.3 mm
Outer Jacket Color Yellow

Electrical Data

Characteristic Impedance@1MHz 120 Ω ± 10 Ω
Conductor Resistance 52.0 Ohm/km max.
Insulation Resistance 0.20 GOhm x km min.
Mutual Capacitance@800Hz 45.0 nF/km nom.
Working Voltage Max: 250 V
Test Voltage 3.0 KV
Data Rate 500 Kbit/s 100m
  250 Kbit/s 250m
  125 Kbit/s 500m
  50 Kbit/s 1000m
Attenuation 1 MHz < 1.6 dB/100m
  5 MHz < 3.4 dB/100m
  10 MHz < 5.6 dB/100m
  16 MHz < 7.5 dB/100m

Technical Data

Weight approximately 68.0 kg/km
Min. Bending Radius (Laying) 10 x OD mm
Operating Temp.Range, min. - 30 °C
Operating Temp.Range, max. +80 °C
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