Analogue inputs
Two analogue inputs for voltage signals (terminals 53
and 54) are provided for reference and feedback sig-
nals. Furthermore, an analogue input is available for
current signal (terminal 60). A thermistor can be con-
nected to voltage input 53 or 54.
The two analogue voltage inputs can be scaled in the
range of 0-10 V DC; the current input in the range of
0-20 mA.
The table below gives the possibilities for program-
ming the analogue inputs. Parameter 317
Time out
and
318
Function after time out
allow activation of a time-
out function on all analogue inputs. If the signal value
of the reference or feedback signal connected to one
of the analogue input terminals drops to below 50% of
the minimum scaling, a function will be activated after
the time out determined in parameter 318,
Function
after time out
.
Analogue inputs
terminal no.
53(voltage)
54(voltage)
60(current)
parameter
308
311
314
Value:
No operation
(NO OPERATION)
[0]
[0]
[0]
Reference
(REFERENCE)
[1]
[1]
[1]
Feedback
(FEEDBACK)
[2]
[2]
[2]
Thermistor
(THERMISTOR)
[3]
[3]
308
Terminal 53, analogue input voltage
(AI [V] 53 FUNCT.)
Function:
This parameter is used to select the required function
to be linked to terminal 53.
Description of choice:
No operation. Is selected if the frequency converter is
not to react to signals connected to the terminal.
Reference. Is selected to enable change of reference
by means of an analogue reference signal.
If reference signals are connected to several inputs,
these reference signals must be added up.
Feedback. If a feedback signal in connected, there is
a choice of a voltage input (terminal 53 or 54) or a cur-
rent input (terminal 60) as feedback. In the case of
zone regulation, feedback signals must be selected as
voltage inputs (terminals 53 and 54). See
Feedback
handling
.
Thermistor. Is selected if a motor-integrated thermis-
tor (according to DIN 44080/81) should stop the fre-
quency converter in case of motor overtemperature.
The cut-out value is 3 kohm.
If a motor features a Klixon thermal switch instead, this
can also be connected to the input. If motors run in
parallel, the thermistors/thermal switches can be con-
nected in series (total resistance < 3 kohm). Parameter
117
Motor thermal protection
must be programmed
for
Thermal warning
[1] or
Thermistor trip
[2], and the
thermistor must be inserted between terminal 53 or 54
(analogue voltage input) and terminal 50 (+10 V sup-
ply).
309
Terminal 53, min. scaling
(AI 53 SCALE LOW)
Value:
0.0 - 10.0 V
0.0 V
VLT
®
6000 HVAC Series
= factory setting, () = display text, [] = value for use in communication via serial communication port
128
MG.61.B5.02 - VLT
®
is a registered Danfoss trademark
Содержание VLT 6000 HVAC Series
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