Electrical Installation And Control Cables; Control Terminals - Danfoss VLT Micro Drive FC 51 Design Manual

How to Install

6.13 Electrical Installation and Control Cables

Terminal number
1+2+3
12
18
19
20 Terminal 20 Common Digital Ground
27
29
33
Terminal 42 Analog Output/Digital
42
50 Terminal 50 Supply for Analog Input
Terminal 53 Analog Input (Voltage or
53
55 Terminal 55 Common Analog Ground
60
Table 6.4 Terminal Connections
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, break the screen or insert a 100 nF capacitor
between screen and chassis.
NOTE
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.
NOTE
Control cables must be screened/armoured.
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®
VLT Micro Drive FC 51 Design Guide
Terminal description
Terminal 1+2+3 - Relay1
Terminal 12 Supply
Terminal 18 Digital Input
Terminal 19 Digital Input
Terminal 27 Digital Input
Terminal 29 Digital Input
Terminal 33 Digital Input
Output
Current)
Terminal 60 Current Input
®
MG02K202 - VLT is a registered Danfoss trademark
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
NOTE
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
57
6 6