Bosch Rexroth R911310079 Manuale Utente Scaricare il pdf (Pagina 47)

VSB 40.1 PC Box 7-11

DOK-SUPPL*-VSB*40.1***-PR02-EN-P

DANGER

Danger without protective separation!

⇒ The 24 VDC input voltage must comply with the

requirements of the "Protective separation".

⇒ Plug and unplug the connector only in no-voltage

condition!

+ 24V

400V + 5%

400V

400V - 5%

Sichertrafo.cdr

Fig. 7-12: Safety transformer according to EN 60742

Interfering AC voltage components such as resulting from an uncontrolled

3-phase current bridge connection without smoothing with a ripple factor

(see DIN 40110/10.75, section 1.2) of 5 % are permissible.

It follows from the above that as upper voltage limit the greatest absolute

value is 30.2 V and as lower voltage limit the lowest absolute value is

18.5 V.

1.05 x 28.8 V = 30.2 V

Upper limit 28.8 V

0.866 x 30.2 V = 26.1 V

1.5 x 20.4 V = 21.4 V

Lower limit

20.4 V

0.866 x 21.4 V = 18.5 V

30 el

cos (30 ) = 0.866

Wechsel.cdr

Fig. 7-13: Illustration of the limit values for the 24 VDC voltage

1 2 ... 42 43 44 45 46 47 48 49 50 51 52 ... 85 86

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Bosch Rexroth R911310079 Manuale Utente Pagina 47