Lenze E94AYCIB - Manual (Page 27)

Lenze · E94AYCIB communication module (INTERBUS) · Communication Manual · DMS 4.0 EN · 02/2014 · TD17
27
5 Installation
5.2 Electrical installation
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
5.2.5 Bus cable specification
The nodes at the bus system must be wired with one of the fieldbus cables that complies with the
INTERBUS specification.
A manufacturer of INTERBUS cables is e.g. PHOENIX CONTACT (Germany).
Properties of the bus cable according to the INTERBUS specification
5.2.6 Bus cable length
Set the baud rate according to the length of the bus cable between the single INTERBUS nodes:
 Possible settings via DIP switch ( 30)
 Settings in »Engineer« ( 34)

Note!
A cable which does not fulfil the requirements of the INTERBUS specification must not
be used!
General properties
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 2
DC-cable resistance < 96 /km
Impedance (characteristic) • 120  ± 20 % (f = 64 kHz)
• 100  ± 15  (f > 1 MHz)
Capacitance per unit length < 60 nF/km (f = 800 Hz)
Baud rate Cable length between the single 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 just high enough to suit your application.