Danfoss VLT CDS 303 User Manual

3.3.11 Electrical Installation, Control Cables
Use terminal 37 as input for safe stop. In rare cases, control cables more than 100 m (330 ft) and analog signals result in
50/60 Hz ground loops due to noise from mains supply cables. If this situation occurs, break the screen or insert a 100 nF
capacitor between screen and chassis. Connect the digital and analog inputs and outputs separately to the frequency
converter common inputs (terminal 20, 55, 39) to avoid ground currents aecting the system.
Figure 3.24 Electrical Diagram - Control Cables
Control cables must be shielded/armored. To connect the screen to the frequency converter decoupling plate for control
cables, use a clamp from the accessory bag.
How to Install
VLT
®
Compressor Drives CDS 302/CDS 303
24 Danfoss A/S © Rev. 2013-07-03 All rights reserved. MG34M422
33

Danfoss VLT CDS 303 Specifications

General

Brand	Danfoss
Model	VLT CDS 303
Category	DC Drives
Language	English