SINUS K
INSTALLATION
INSTRUCTIONS
93/
191
10.1.4.
MDI-M
ULTIFUNCTION
D
IGITAL
I
NPUTS
(T
ERMINALS
9
TO
13)
The programmable digital input functionality is detailed in the SINUS K’s Programming Manual.
10.1.5.
M
OTOR
T
HERMAL
P
ROTECTION
(PTC
T
YPE
)
I
NPUT
(T
ERMINAL
13)
The inverter manages the signal sent from a thermistor (PTC) incorporated in the motor windings to obtain a
hardware thermal protection of the motor. The thermistor ratings must comply with BS4999 Pt.111
(DIN44081/DIN44082):
Resistor corresponding to trip value:
1000 ohm (typical rating)
Resistor at Tr–5°C:
< 550 ohm
Resistor at Tr+5°C:
> 1330 ohm
Do the following to use the thermistor:
1) Set jumper J9 to position 1-2,
2) Connect thermistor between terminals 13 and 14 in the control board,
3) Set MDI5 as auxiliary trip (Ext A).
In that way, the inverter will stop and indicate "auxiliary trip" as soon as the motor temperature exceeds
threshold value Tr.
10.2.
Analog Input Features (Terminals 2,3,15 and 21)
Inputs Vref1 and Vref2 (terminals 2 and 3) acknowledge both unipolar signals (0
÷
10V, factory setting) and
bipolar signals (±10V) based on jumper J14 position.
Signals sent to terminals 2 and 3 are summed up.
Auxiliary power supply (+10V, terminal 4) is available to power an external potentiometer (2.5÷10 k
Ω
).
Do the following to use a bipolar signal (± 10 V) at the inverter input:
- set jumper J14 to position 1-2 (+/-)
- set parameter P18 (Vref J14 Pos.) as “+/-”
- set parameter P15 (Minimum Ref) as “+/-”
The motor direction of rotation changes when the main reference sign becomes opposite.
Bipolar voltage (±10V) may be sent to input Inaux (terminal 19). The motor direction of rotation changes when
negative signals are sent.
Analog input Iref (terminal 21) acknowledges a current value ranging from 0 to 20mA as an input signal
(factory setting: 4÷20 mA).
CAUTION
Do not apply signals exceeding ±10V to terminals 2 and 3. Do not send current
values exceeding 20mA to terminal 21.
Parameters P16 (Vref Bias), P17 (Vref Gain), P19 (Inmax), and P20 (Iref Gain) allow changing the relationship
between the signals sent to terminals 2, 3 and 21 and the main reference.
It is possible to change the relationship between the signal sent to terminal 19 (Inaux) and the value acquired
through parameters P21 and P22. Programming and functionality of the parameters managing analog inputs
are detailed in the Programming Manual.
Содержание SINUS K
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