Wiring To Control Terminals; Using Screened Control Cables; Control Terminal Functions - Danfoss VLT AutomationDrive Operating Instructions Manual

Installation
Terminal Parameter
61
2 2
68 (+)
69 (-)
01, 02, 03
04, 05, 06
Table 2.3 Terminal Description

2.4.5.3 Wiring to Control Terminals

Control terminal connectors can be unplugged from the
frequency converter for ease of installation, as shown in
Illustration 2.11.
1. Open the contact by inserting a small screwdriver
into the slot above or below the contact, as shown
in Illustration 2.13.
2. Insert the bared control wire into the contact.
3. Remove the screwdriver to fasten the control wire
into the contact.
4. Ensure the contact is firmly established and not
loose. Loose control wiring can be the source of
equipment faults or less than optimal operation.
See 10.1 Power-dependent Specifications for control terminal
wiring sizes.
See 6 Application Set-Up Examples for typical control wiring
connections.
Illustration 2.13 Connecting Control Wiring
16
Terminal description
Default
setting Description
Serial communication
- Integrated RC-Filter for
cable screen. ONLY for
connecting the screen
when experiencing
EMC problems.
8-3 RS-485 Interface. A
control card switch is
8-3
provided for
termination resistance.
Relays
[0] No
Form C relay output.
5-40 [0] operation
Usable for AC or DC
5-40 [1] [0] No voltage and resistive or
operation inductive loads.
MG.33.AJ.02 - VLT
®
VLT AutomationDrive Operating
Instructions

2.4.5.4 Using Screened Control Cables

Correct screening
The preferred method in most cases is to secure control and
serial communication cables with screening clamps provided
at both ends to ensure best possible high frequency cable
contact.
If the earth potential between the frequency converter and
the PLC is different, electric noise may occur that will disturb
the entire system. Solve this problem by fitting an equalizing
cable next to the control cable. Minimum cable cross section:
2
16 mm
50/60Hz ground loops
With very long control cables, ground loops may occur. To
eliminate ground loops, connect one end of the screen-to-
ground with a 100nF capacitor (keeping leads short).
Avoid EMC noise on serial communication
This terminal is connected to earth via an internal RC link.
Use twisted-pair cables to reduce interference between
conductors. The recommended method is shown below:
Alternatively, the connection to terminal 61 can be omitted:

2.4.5.5 Control Terminal Functions

Frequency converter functions are commanded by receiving
control input signals.
•
®
is a registered Danfoss trademark
.
Each terminal must be programmed for the
function it will be supporting in the parameters