Danfoss VLT Series Design Manual

Also see for VLT series: Service manual Installation guide Operating instructions Operating instructions Service manual

Contents

Danfoss VLT Series Design Manual Manual pdf 95 page image

5.2.12. Electrical Installation, Control CablesIllustration 5.16: Terminal 37: Safe Stop input available with Safe Stop Function only!Very long control cables and analog signals may in rare cases and depending on installation resultin 50/60 Hz earth loops due to noise from mains supply cables.If this occurs, you may have to break the screen or insert a 100 nF capacitor between screen andchassis.The digital and analog in- and outputs must be connected separately to the VLT HVAC Drivecommon inputs (terminal 20, 55, 39) to avoid ground currents from both groups to affect othergroups. For example, switching on the digital input may disturb the analog input signal.NB!Control cables must be screened/armoured.VLT® HVAC Drive Design Guide 5. How to InstallMG.11.B2.02 - VLT® is a registered Danfoss trademark 955