2.5.4 Control Terminal Types
Terminal functions and default settings are summarized in
2.5.6 Control Terminal Functions
.
Figure 2.17 Control Terminal Locations
•
Connector 1 provides four programmable digital
input terminals, two additional digital terminals
programmable as either input or output, a 24 V
DC terminal supply voltage, and a common for
optional customer supplied 24 V DC voltage.
•
Connector 2 terminals (+)68 and (-)69 are for an
RS-485 serial communications connection.
•
Connector 3 provides two analog inputs, one
analog output, 10 V DC supply voltage, and
commons for the inputs and output.
•
Connector 4 is a USB port available for use with
the MCT 10 Set-up Software.
•
Also provided are two Form C relay outputs that
are in various locations depending upon the
frequency converter configuration and size.
•
Some options available for ordering with the unit
may provide additional terminals. See the manual
provided with the equipment option.
2.5.5 Wiring to Control Terminals
Terminal plugs can be removed for easy access.
Figure 2.18
2.5.6 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
5 Programming
and
6 Application Examples
for terminals and
associated parameters.
•
It is important to confirm that the control
terminal is programmed for the correct function.
See
5 Programming
for details on accessing
parameters and programming.
•
The default terminal programming is intended to
initiate frequency converter functioning in a
typical operational mode.
2.6 Serial
Communication
RS-485 is a two-wire bus interface compatible with multi-
drop network topology, i.e. nodes can be connected as a
bus, or via drop cables from a common trunk line. A total
of 32 nodes can be connected to one network segment.
Repeaters divide network segments. Each repeater
functions as a node within the segment in which it is
installed. Each node connected within a given network
must have a unique node address across all segments.
Terminate each segment at both ends, using either the
termination switch (S801) of the frequency converter or a
biased termination resistor network. Always use screened
twisted pair (STP) cable for bus cabling, and always follow
good common installation practice.
Low-impedance earth (ground) connection of the screen at
every node is important, including at high frequencies.
Thus, connect a large surface of the screen to earth
Installation
VLT® Automation VT Drive FC 322 D-Frame Instruction Manual
MG21E122 - VLT® is a registered Danfoss trademark
2-13
2
2
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