The AS-i tuner: optimum setting, increased safety, longer cable
 
 

 
 Improved data transfer, diagnosisvia optimised bus termination
  • Permanent monitoring of the message quality, display of critical states by LED “traffic lights”.
  • AS-i tuner: Active bus termination with teach-in phase for adaptation to AS-i networks.
  • Protection rating IP 67 for direct installation in the field at the end of the AS-i cable.
  • Use in conjunction with repeaters possible, overall length up to 750 m.
  • Easy mounting with flat or round cable lower part.
Introduction
The communication of an AS-i network can be considerably improved by the connection of a suitable terminating resistor. It is composed of an inductor, resistor and capacitor.This leads to the effect that an AS-i network can be operated with a cable length of up to 100 m. As flexible tree, ring, star and line topologies are possible with AS-i, there are no clear rules as regards the possible cable length.

Empirical measurements with different arrangements have shown that up to 250 m are possible in many networks. To ensure optimum effect, the AS-i tuner is mounted at the end of the AS-i cable which is furthest away from the AS-i power supply. The AS-i tuner has a microprocessor which performs a quality assessment of the AS-i network setting the impedance at one press of the button.

Typical applications:
  • Use at the end of a cable if more than 100 metres of AS-i cable are to be used
  • In nested arrangements mounting furthest away from the AS-i power supply
  • For increased safety with respect to interference in Safety at Work applications
  • If incorrect messages occur frequently and thecause cannot be identified
  • Extension of the AS-i cable with repeaters to up to750 metres between two slaves

AC1146 - AS-i Tuner ClassicLine 90, active
AC2215 - AS-i Repeater SmartLine IP20
AC1216 - AS-i 2,8 Ampere IP20

Further information: bulletin (PDF-file 674 kB).