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Installation
6 720 604 876 (03.12)
2.2 Elektrischer Anschluss
B Busverbindung vom TA 270 zu weiteren
Busteilnehmern:
4-adrige folienabgeschirmte Kupferlei-
tung mit einem Leiterquerschnitt von
mindestens 0,25 mm
2
verwenden.
Dadurch sind die Leitungen gegen äußere
Einflüsse abgeschirmt (z. B. Starkstromkabel,
Fahrdrähte, Trafostationen, Rundfunk- und
Fernsehgeräte, Amateurfunkstationen, Mikro-
wellengeräte, o. Ä.).
B Alle 24-V-Leitungen (Mess-Strom) von 230 V
oder 400 V führenden Leitungen getrennt ver-
legen, um induktive Beeinflussung zu vermei-
den (Mindestabstand 100 mm).
B Maximale Leitungslängen der Bus-
verbindungen:
Zwischen den entferntesten Busteilneh-
mern ca. 150 m.
Gesamtlänge aller Busleitungen
ca. 500 m.
Durch installieren von Abzweigdosen Lei-
tungslängen sparen.
Adernbelegung:
1 = Spannungsversorgung 17...24 V DC
2 = Datenleitung (BUS-High)
•4 = GND
6 = Datenleitung (BUS-Low).
Bild 20 Verbindung der Busteilnehmer
A Abzweigdose
B Busteilnehmer
(z. B. Bosch Heatronic, HSM usw.)
B Leitungslänge und -querschnitt zum
Außentemperaturfühler:
Länge bis 20 m 0,75 bis 1,5 mm
2
Länge bis 30 m 1,0 bis 1,5 mm
2
Länge über 30 m 1,5 mm
2
i
Fehlfunktionen vermeiden:
B Keine Kreisverbindung unter
den Busteilnehmern herstellen.
B Generell Klemme 1 auf Klem-
me 1 usw. verdrahten.
B
1
1246
4
426
A
A
B
1
12 46
4
426
B
1
12 46
4
426
6 720 610 141-07.2O
100 100
18


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