Jetter JX2-IO16, User Manual

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6 Installation Guide JetWeb
52 Jetter AG
System Bus Cable Specification
The following minimum requirements apply to the manufacture of the system bus
cable:
System Bus Cable - Technical Data
Function Description
Core cross-sectional
area 1 MBaud: 0.25 - 0.34 mm
2
500 kBaud: 0.34 - 0.50 mm
2
250 kBaud: 0.34 - 0.60 mm
2
125 kBaud: 0.50 - 0.60 mm
2
Cable capacitance maximum 60 pF/m
Resistivity 1 MBaud: maximum 70 /km
500 kBaud: maximum 60 /km
250 kBaud: maximum 60 /km
125 kBaud: maximum 60 /km
Number of cores 5
Shield Complete shielding, no paired shielding
Twisting Core pair CL and CH twisted.
Ω
Ω
Ω
Ω
Allowed cable lengths
Baud Rate Max. cable
length
Max. tap line
length
Max. overall tap
line length
1 MBaud 30 m 0.3 m 3 m
500 kBaud 100 m 1 m 39 m
250 kBaud 200 m 3 m 78 m
125 kBaud 200 m - -
Note!
• The maximum cable length depends on the baud rate used and the number of
modules connected to the bus.
• When calculating the maximum line length, please take into account that each
module connected to the bus reduces the cable length by approx. 1 m.