Internal Timer With Constant Speeds/Powered Roof Ventilator - ABB DriveIT ACH550-01 User Manual

Hide thumbs Also See for DriveIT ACH550-01:

Table of Contents

9. Internal timer with constant speeds/ Powered roof

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 has also boost function which activates constant speed 2

after a digital input 3 (DI3) has been momentarily activated. See

the following figure.

For further information see section "Real-time clock and timer

ACH550 User's Manual

Wiring and applications

Driveit ach550-uh