55
Analog Inputs
Two analog inputs for voltage signals, terminals 53 and 54, and an
analog input for current, terminal 60, are provided for reference and
feedback signals. A thermistor can be connected to the voltage inputs,
terminals 53 or 54.
The two analog voltage inputs can be scaled over the range of
0 to 10 V DC. The current input can be scaled over the range of 0
to 20 mA.
The table below shows the possible analog input programming.
Parameter 317,
Time Out,
and Parameter 318,
Function After Time
Out,
allow activation of a time-out function on all analog inputs. If the
signal value of the reference or feedback signal connected to one of the
analog input terminals drops below 50% of the minimum scaling, the
function set in parameter 318,
Function After Time Out
, will be
activated after the time-out set in parameter 317.
Analog Inputs
Terminal Number
53 (Voltage)
54 (Voltage)
60 (Current)
Analog Inputs
Terminal Number
53
54
60
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, Analog 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.
Selected if the drive is not to react to signals connected
to the terminal.
Reference
.
Selected to enable change of reference by means of an
analog reference signal. If reference signals are connected to several
inputs, these reference signals will be summed.
Feedback.
If a feedback signal is connected, a voltage input may be
connected to either terminal 53 or 54, or a current input conected to
terminal 60. If a two zone PID control is used, the feedback signals must
be voltage inputs and applied to terminals 53 and 54. See
Feedback
Handling
.
Thermistor.
Selected if a thermistor in the motor stops the drive in case
of motor overtemperature. The cutout value is 3 kohm. A Klixon thermal
switch may also be connected to this input. If parallel sensors are used,
the thermistors/thermal switches can be connected in series. The drive
will shut down when the total resistance exceeds 3 kohms.
NOTE
When a thermistor is mounted in motor wiring,
a breakdown of insulation between thermistor
and motor can feed high voltage back to drive
control terminals. To comply with protective
extra-low voltage (PELV) grounding
requirements, if applicable, thermistor must be
mounted externally.
Parameter 117,
Motor Thermal Protection,
must be programmed for
Thermal Warning
or
Thermistor Trip
, and the thermistor must be
inserted between terminal 53 or 54,
analog voltage input
, and terminal
50,
10 V supply
.
✭
I
ndicates factory default setting. Numbers in brackets [ ] represent selection as displayed on the serial bus.
