Yaskawa Profibus-DP Option Card CM061 - Manual (Page 43)

Product Specification B-3
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PROFIBUS-DP Cable Specification
The cable used by the PROFIBUS-DP network is specified by PROFIBUS European Standard EN50170. It is a shielded, twisted pair cable
with the following specifications. In order for the cable to fit the currently available PROFIBUS-DP standard connectors, the surrounding
diameter must be 8.0mm (+/- 0.5 mm).
Table B.1 – PROFIBUS-DP Cable Specifications
Parameter PROFIBUS-DP Cable Requirements
Impedance 135 to 165 Ohm / 3 to 20Mhz
Capacitance < 30 pF / m
Resistance < 110 Ohm / Km
Wire Gauge > 0.64 mm
Conductor Area > 0.34 mm 2
Shield Density Greater than 80%
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PROFIBUS-DP Cable Length Limits
Both data rate and cable type affect the total allowable length of the network. The total amount of measured linear cable allowed between
any two points on the network segment must be within the following table’s specification. Also, the total amount of network length,
allowed through segment repeaters must be less than the Maximum Network Length in the following table. The minimum cable length
between device connections is one (1) meter.
Table B.2 – PROFIBUS-DP Cable Length Specifications
Baud Rate Maximum Segment Length Maximum Network Length
9.6 Kbps 1,200 Meters 10,000 Meters
187.5 Kbps 1,000 Meters 10,000 Meters
500.0 Kbps 400 Meters 4,000 Meters
1.5 Mbps 200 Meters 2,000 Meters
3.0 Mbps 100 Meters 1,000 Meters
6.0 Mbps 100 Meters 1,000 Meters
12.0 Mbps 100 Meters 1,000 Meters
# PROFIBUS-DP Stub Length Limits
The total amount of measured linear cable allowed between the point of the stub connection (from the main PROFIBUS-DP cable) to the
node connection on the line, along with the cumulative total or sum of all stub cable length(s) must not exceed the maximum specified.
When calculating stub lengths, include stub in the device itself. Use 1cm for each drive. The following table and diagram specifies the stub
length requirements. DO NOT use stubs when the PROFIBUS-DP network is configured to operate at baud rates above 1.5Mbps
Table B.3 – PROFIBUS-DP Stub Length Specifications
Baud Rate Total Capacitance for all Stubs Total Stub Length
9.6 Kbps 15.0 nF 500 Meters
187.5 Kbps 3.0 nF 100 Meters
500.0 Kbps 1.0 nF 33 Meters
1.5 Mbps 0.6 nF 20 Meters
3.0 Mbps 0.2 nF Approx. 0
6.0 Mbps Stubs Not Allowed Approx. 0
12.0 Mbps Stubs Not Allowed Approx. 0