5.2.12. Electrical Installation, Control Cables
Illustration 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 result
in 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 and
chassis.
The digital and analog in- and outputs must be connected separately to the VLT HVAC Drive
common inputs (terminal 20, 55, 39) to avoid ground currents from both groups to affect other
groups. 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 Install
MG.11.B2.02 - VLT
®
is a registered Danfoss trademark
95
5
Содержание VLT series
Страница 78: ...4 How to Order VLT HVAC Drive Design Guide 78 MG 11 B2 02 VLT is a registered Danfoss trademark 4...
Страница 120: ...7 RS 485 Installation and Set up VLT HVAC Drive Design Guide 120 MG 11 B2 02 VLT is a registered Danfoss trademark 7...
Страница 152: ...8 Troubleshooting VLT HVAC Drive Design Guide 152 MG 11 B2 02 VLT is a registered Danfoss trademark 8...