Terminal description
Terminal
Parameter
Default
setting
Description
Serial communication
61
-
Integrated RC-Filter for
cable screen. ONLY for
connecting the screen
when experiencing
EMC problems.
68 (+)
8-3
RS-485 Interface. A
control card switch is
provided for
termination resistance.
69 (-)
8-3
Relays
01, 02, 03
5-40 [0]
[0] No
operation
Form C relay output.
Usable for AC or DC
voltage and resistive or
inductive loads.
04, 05, 06
5-40 [1]
[0] No
operation
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
1.
Open the contact by inserting a small screwdriver
into the slot above or below the contact, as shown
in
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
for typical control wiring
connections.
Illustration 2.13 Connecting Control Wiring
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:
16 mm
2
.
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.
•
Each terminal must be programmed for the
function it will be supporting in the parameters
Installation
VLT
®
AutomationDrive Operating
Instructions
16
MG.33.AJ.02 - VLT
®
is a registered Danfoss trademark
2
2
