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:
PE
FC
PE
FC
130BB923.11
PE
PE
69
68
61
69
68
61
1
2
Illustration 2.16 Twisted-pair Cables
1
Min. 16 mm
2
2
Equalizing cable
Table 2.7 Legend to
Alternatively, the connection to terminal 61 can be
omitted:
PE
FC
PE
FC
130BB924.11
PE
PE
69
69
68
68
1
2
Illustration 2.17 Twisted-pair Cables without Terminal 61
1
Min. 16 mm
2
2
Equalizing cable
Table 2.8 Legend to
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
associated with that terminal. See
for
terminals and associated parameters.
•
It is important to confirm that the control
terminal is programmed for the correct function.
See
for details on accessing
parameters and
for details on programming.
•
The default terminal programming is intended to
initiate frequency converter functioning in a
typical operational mode.
2.4.5.6 Jumper Terminals 12 and 27
A jumper wire may be required between terminal 12 (or
13) and terminal 27 for the frequency converter to operate
when using factory default programming values.
•
Digital input terminal 27 is designed to receive an
24 V DC external interlock command. In many
applications, the user wires an external interlock
device to terminal 27
•
When no interlock device is used, wire a jumper
between control terminal 12 (recommended) or
13 to terminal 27. This provides in internal 24 V
signal on terminal 27
•
No signal present prevents the unit from
operating
•
When the status line at the bottom of the LCP
reads AUTO REMOTE COAST, this indicates that
the unit is ready to operate but is missing an
input signal on terminal 27.
•
When factory installed optional equipment is
wired to terminal 27, do not remove that wiring
2.4.5.7 Terminal 53 and 54 Switches
•
Analog input terminals 53 and 54 can select
either voltage (-10 to 10 V) or current (0/4-20 mA)
input signals
•
Remove power to the frequency converter before
changing switch positions
•
Set switches A53 and A54 to select the signal
type. U selects voltage, I selects current.
•
The switches are accessible when the LCP has
been removed (see
).
NOTE
Some option cards available for the unit may cover these
switches and must be removed to change switch settings.
Always remove power to the unit before removing option
cards.
•
Terminal 53 default is for a speed reference signal
in open loop set in
16-61 Terminal 53 Switch
Setting
•
Terminal 54 default is for a feedback signal in
closed loop set in
16-63 Terminal 54 Switch Setting
Installation
VLT
®
AutomationDrive Operating
Instructions
18
MG33AM02 - VLT
®
is a registered Danfoss trademark
2
2
