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E84AYCIB communication manual (INTERBUS)

Installation

Electrical installation

30 L EDS84AYCIB EN 4.0 - 11/2010

5.2.4 Specification of the bus cable

5.2.5 Bus cable length

Adapt the baud rate according to the bus cable length:

 Note!

Only use cables that meet the listed specifications.

Specification of the INTERBUS cable

Cable type Sold by the meter

(e.g. PHOENIX CONTACT: IBS RBC meter-T, order no. 28 06 28 6)

No. of conductors 3 x 2, twisted in pairs, with joint shielding

Conductor cross-section > 0.2 mm

DC-cable resistance < 96 Ω/km

Impedance (characteristic) • 120 Ω ± 20 % (f = 64 kHz)

• 100 Ω ± 15 Ω (f > 1 MHz)

Capacitance per unit length < 60 nF/km (f = 800 Hz)

Baud rate Cable length between the individual INTERBUS nodes

500 kbps Max. 400 m

2 Mbps Max. 150 m

 Note!

Select the baud rate which depends on the data volume, cycle time, and number

of nodes only as high as required for the application.

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