MASI65-M12 User's manual
16 V 1.1
2.4 Electrical specification
2.4.1 System cables
To meet individual application requirements, system wiring on the field bus side can be realized either
with round cables
2
or also with the yellow ribbon cable
3
characteristic for AS-Interface systems.
Cables are basically of the 2-wire type without PE cable. Cable screening in not necessary thanks to the
transmission technology.
Two electrical aspects are decisive in the selection of a suitable transmission cable :
a) DC resistance (line cross-section)
for reasons of auxiliary power transfer
b) Transmission characteristics
Impedance from 80 to 120 ohms for 167 kHz
Additional auxiliary power is usually required for actuators. For an easy installation of ribbon cables, these
are identified by different colours.
Cables
yellow - AS-Interface field bus cable
black - 24V DC auxiliary power
red - 230V AC auxiliary power
Cable leads
brown - Field bus system cable (ASI+)
24V DC (+24V DC) auxiliary power
AC auxiliary power
blue - Field bus system cable (ASI-)
24V DC (0V) auxiliary power
AC auxiliary power
AS-Interface products with direct connection for ribbon cable carry a geometric code. This offers reliable
protection against electrical polarity reversal.
2
Art. No 55 747
3
Art. No. 55 743
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