Danfoss VLT 380-500 V Design Manual page 123

Control Wiring
12.2.1 Wiring to Control Terminals
Terminal plugs can be removed for easy access.
Illustration 12.3 Removal of Control Terminals
12.2.2 Enabling Motor Operation
A jumper wire is 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
24 V DC external interlock command.
•
When no interlock device is used, wire a jumper
between control terminal 12 (recommended) or
13 to terminal 27. The jumper provides an
internal 24 V signal on terminal 27.
•
When the status line at the bottom of the LCP
reads AUTO REMOTE COAST, it 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.
12.2.3 Voltage/Current Input Selection
The analog mains terminals 53 and 54 allow the setting of
the input signal to voltage (0–10 V) or current (0/4–
20 mA). See Illustration 12.2 for the location of the control
terminals within the drive system.
Default parameter settings:
•
Terminal 53: Speed reference signal in open loop
(see parameter 16-61 Terminal 53 Switch Setting).
•
Terminal 54: Feedback signal in closed loop (see
parameter 16-63 Terminal 54 Switch Setting).
MG37N102
Design Guide
NOTICE
REMOVE POWER
Remove power to the frequency converter before
changing switch positions.
1.
2.
3.
1 Bus termination switch
2 A54 switch
3 A53 switch
Illustration 12.4 Locations of Bus Termination Switch and
Switches A53 and A54
12.2.4 RS485 Serial Communication
An RS485 serial communications bus can be used with the
drive system. Up to 32 nodes can be connected as a bus,
or via drop cables from a common trunk line to 1 network
segment. Repeaters can be used to 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.
•
•
Danfoss A/S © 6/2016 All rights reserved.
Remove the LCP (see Illustration 12.4).
Remove any optional equipment covering the
switches.
Set switches A53 and A54 to select the signal
type. U selects voltage, I selects current.
1
3
Connect RS485 serial communication wiring to
terminals (+)68 and (-)69.
Terminate each segment at both ends, using
either the termination switch (bus term on/off,
see Illustration 12.4) on the drive module, or a
biased network termination resistor.
2
12 12
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