OPERATING INSTRUCTIONS NORDAC Frequency Inverters
OPERATING INSTRUCTIONS NORDAC Frequency Inverters
OPERATING INSTRUCTIONS NORDAC Frequency Inverters
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4.2.2 Control inputs<br />
Terminal Function / Notes Data Suggested circuit<br />
6<br />
General S1 to the left<br />
The push-lock terminal strip for the control inputs<br />
is located at the power supply board.<br />
If you remove the front cover, you will find<br />
switches S1 and S3 on this board, by means of<br />
which the inverter can be adjusted to various<br />
control signals.<br />
S 3 S 1<br />
8-pole DIP switch slider switch,<br />
two positions<br />
S 1 : Switchcover of signal level at<br />
terminals 6, 7, 8, 11, 12<br />
S 1 to the left<br />
Control commands<br />
a) potential free contacts<br />
b) Transistor (npn)<br />
open collector<br />
S 1 to the right<br />
----> works setting<br />
Control commands as external signal tension from +15 VDC S1 to the right<br />
e.g. as PLC-control to +30 VDC<br />
S 3 : Switchover setpoint actual point<br />
OFF ON<br />
Terminal 1 high- Terminal 1 lowohms<br />
against GND ohms against GND<br />
rpm-regulation <strong>Frequency</strong> control<br />
*)<br />
4 ... 20 mA 0 ... 20 mA<br />
0 ... 20 mA 4 ... 20 mA<br />
Negative set- +/- Setpoint<br />
point switched active<br />
off<br />
frequency rpm-regulation<br />
control *)<br />
Actual point area Actual point area<br />
30V to 100V *) 10V to 40V *)<br />
not connected<br />
(N.C.)<br />
*) PI controller option<br />
(see point 9.0)
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