62
VLT
®
3500 HVAC
MG.35.B1.02 – VLT is a registered Danfoss trademark
400 Terminal 16 input (INPUT 16) continued
The thermistor is to be connected between terminal
50 (+10 V) and terminal 16. When the resistance of
the thermistor exceeds 3 k
Ω
, the frequency converter
will trip and the following message will be displayed:
If a motor features a Klixon thermal switch rather than
a thermistor, this switch can also be used for this in-
put. If motors are running in parallel, thermistors can
be connected in series, their number depending on
the ohmic value of the thermistor in warm running
condition.
NB!:
NB!:
NB!:
NB!:
NB!:
If Thermistor is selected in parameter 400
without a thermistor being connected, the
frequency converter will go into the Alarm
Mode. To exit from this mode, hold down the
“stop/reset” key while changing the data
values by means of the “+”/”-” keys.
External H-O-A Hand
[5]:
Selected if the H-O-A function is to be used externally
from the frequency converter for switching between
hand-operation (Hand) and normal remote control
(Auto). By energizing 24 V DC from terminal 12 to ter-
minal 16, the hand-operation mode is activated and
adjustment of the output frequency - by the reference
chosen as external hand-operation reference in para-
meter 420 - is enabled.
The inverter of the frequency converter does not start
until a Pulse Start Hand is given via terminal 19 or ter-
minal 29.
★
= factory setting. Text in ( ) = display text. Figures in [ ] are used when communicating with the bus.
3.8 Parameter gr
oup 4
401 Terminal 17 input (INPUT 17)
Value:
Reset (RESET)
[0]
Stop (STOP)
[1]
★
Freeze reference (FREEZE REF.)
[2]
Selection of set-up (SETUP SELECT)
[3]
Pulse input 100 Hz (PULSES 100 Hz)
[4]
Pulse input 1 kHz (PULSES 1 KHz)
[5]
Pulse input 10 kHz (PULSES 10 KHz)
[6]
External H-O-A Auto (EXT. HOA AUTO)
[7]
Function:
Used for choosing between different possible
functions of terminal 17.
Description of choice:
Reset, stop, freeze reference and choice of set-up as
terminal 16.
Pulses:
Terminal 17 can be used for pulse signals in the ran-
ges: 0-100 Hz, 0-1 kHz and 0-10 kHz. The pulse sig-
nal can be used as a speed reference in normal ope-
ration and as either setpoint or feedback signal for
operation in "closed loop" (PID regulator); see also pa-
rameter 101 if required. Pulse emitters with a PNP
signal can be used between terminals 12 and 17.
Earth connection to terminal 20.
External H-O-A Auto
[7]:
Selected if the H-O-A function is to be used externally
from the frequency converter for switching between
hand-operation (Hand) and normal remote control
(Auto). By energizing 24 V DC from terminal 12 to ter-
minal 17, the normal remote control mode is activated
and normal control via the control terminals of the
frequency converter is enabled.
ALARM
TRIP
MOTOR TRIP
