Danfoss VLT Series Programming Manual page 49

Parameter Description
t [s]
2000
1000
600
500
400
3 3
300
200
100
60
50
40
30
20
10
1.0
WARNING
In order to maintain PELV, all connections made to the
control terminals must be PELV, e.g. thermistor must be
reinforced/ double insulated
NOTE
Danfoss recommends using 24V DC as thermistor supply
voltage.
NOTE
The ETR timer function does not work when 1-10 Motor
Construction = [1] PM, non salient SPM.
NOTE
For correct operation of ETR function setting in 1-03 Torque
Characteristics must fit the application (see description of
1-03 Torque Characteristics).
1-91 Motor External Fan
Option: Function:
[0] No No external fan is required, i.e. the motor is derated at
*
low speed.
[1] Yes Applies an external motor fan (external ventilation), so
no derating of the motor is required at low speed. The
upper curve in graph above (fout = 1 x fM,N) is
followed if the motor current is lower than nominal
motor current (see 1-24 Motor Current). If the motor
current exceeds nominal current, the operation time
still decreases as if no fan were installed.
48
f OUT = 1 x f M,N (par. 1-23)
f OUT = 2 x f M,N
f OUT = 0. 2 x f M,N
I
1.6 1.8 2.0
1.2 1.4
MG.11.CC.02 - VLT
®
VLT HVAC Drive Programming Guide
1-93 Thermistor Source
Option:
[0] None
*
I
M
[1] Analog input 53
(par. 1-24)
MN
[2] Analog input 54
[3] Digital input 18
[4] Digital input 19
[5] Digital input 32
[6] Digital input 33
NOTE
This parameter cannot be adjusted while the motor is
running.
NOTE
Digital input should be set to [0] PNP - Active at 24V in
5-00 Digital I/O Mode.
®
is a registered Danfoss trademark
Function:
Select the input to which the thermistor
(PTC sensor) should be connected. An
analog input option [1] or [2] cannot be
selected if the analog input is already in
use as a reference source (selected in
3-15 Reference 1 Source, 3-16 Reference 2
Source or 3-17 Reference 3 Source).
When using MCB 112, choice [0] None
must always be selected.