Yaskawa Profibus-DP Option Card CM061 Manual de usuario descargar pdf (Pagina 43)

Product Specification B-3

# 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

Shield Density Greater than 80%

# 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

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Yaskawa Profibus-DP Option Card CM061 Manual de usuario Pagina 43