Electrical Installation And Control Cables; Control Terminals; Access To Control Terminals - Danfoss VLT FC51 Design Manual

How to Install

6.13 Electrical Installation and Control Cables

Terminal number
1+2+3
12
18
19
20
27
29
33
42
50
6 6
53
55
60
Table 6.3 Terminal Connections
Very long control cables and analog signals may, in rare
cases and depending on installation, result in 50/60 Hz
ground loops due to noise from mains supply cables.
If this occurs, break the screen or insert a 100 nF capacitor
between screen and chassis.
NOTICE
The common of digital/analog inputs and outputs should
be connected to separate common terminals 20, 39, and
55. This avoids ground current interference among
groups. For example, it avoids switching on digital
inputs disturbing analog inputs.
NOTICE
Control cables must be screened/armoured.
52
®
VLT Micro Drive FC 51 Design Guide
Terminal description
Terminal 1+2+3 - Relay1
Terminal 12, DC 24V Supply
Terminal 18 Digital Input
Terminal 19 Digital Input
Terminal 20 Common Digital Ground
Terminal 27 Digital Input
Terminal 29 Digital Input
Terminal 33 Digital Input
Terminal 42 Analog Output/Digital
Output
Terminal 50 Supply for Analog Input
Terminal 53 Analog Input (Voltage or
Current)
Terminal 55 Common Analog Ground
Terminal 60 Current Input
MG02K302 - Rev. 2013-12-03
Parameter number
5-40
-
5-10
5-11
-
5-12
5-13
5-15
6-9*
-
3-15/6-1*
-
3-16/6-2*

6.14 Control Terminals

6.14.1 Access to Control Terminals

All control cable terminals are located underneath the
terminal cover in front of the frequency converter. Remove
the terminal cover using a screwdriver.
Illustration 6.13 Removing Terminal Cover
NOTICE
See back of terminal cover for outlines of control
terminals and switches.
Factory default
No operation
+24 V DC
Start
Reversing
Common
Reset
Jog
Preset ref bit 0
No operation
+10 V DC
Reference
Common
Reference