ABB RCNA-01 Manuel d'utilisateur Page 112

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ACH550-01 User's Manual
108 Application macros and wiring
9. Internal timer with constant speeds / Powered roof
ventilator
This application macro is intended e.g. for timed powered roof
ventilator applications which alternate between two constant
speeds (constant speed 1 and 2) with a built-in timer. This macro
also has a boost function, which activates constant speed 2 after
digital input 3 (DI3) has been momentarily activated. See the
figure below.
For further information, see chapter Real-time clock and timed
functions.
© Copyright 2007 ABB
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