NORDAC FLEX (SK 200E ... SK 235E) – Brief instructions for Frequency Inverters
36 BU 0240 en-US-4920
Reaction time of digital inputs
The reaction time of a digital signal is approx. 4-5 ms and consists of the following:
For digital inputs DIN2 and DIN3 there is a parallel channel which relays the signal pulses between 250 Hz and
205 kHz directly to the processor, and therefore makes it possible for a rotary encoder to be evaluated.
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Cable routing
All control cables (including PTC thermistors) must be routed separately from power and motor cables
to prevent interference in the device.
If the cables are routed in parallel, keep a minimum distance of 20 cm from cables which carry a
voltage of > 60
V. The minimum distance may be reduced by shielding live cables or by using
grounded metal separator within the cable ducts.
Alternatively: Use of a hybrid cable with shielded control lines.
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