NORDAC FLEX (SK 200E ... SK 235E) – Users Manual for Frequency Inverters
66 BU 0200 en-3118
Reaction time of the digital inputs
The reaction time of a digital signal is approx. 4-5 ms and consists of the following:
A parallel channel exists for digital inputs DIN2 and DIN3, which relays the signal pulses between 250 Hz and
205 kHz directly to the processor, and therefore makes it possible for an encoder to be evaluated.
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All control cables (including thermistors) must be routed separately from the mains and the motor cables to
prevent interference in the device.
If the cables are routed in parallel, a minimum distance of 20 cm must be maintained from cables which carry a
voltage of > 60 V. The minimum distance may be reduced by screening the cables which carry a voltage, or by
the use of earthed metal partitions within the cable conduits.
Alternative: Using a hybrid cable with shielding of the control lines.
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