HEIDENHAIN PWM 8 Operating Instructions Manual page 56

Diagnostic set
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HTL square-wave signals can be transferred over cable lengths up to 300 m (ERN 1030: 100 m) to the
subsequent electronics (PLC etc.).
We recommend not to exceed the cable length related to the scanning frequency and to the power supply,
since otherwise the switching times resp. the edge gradient cannot be maintained.
In the subsequent electronics HTL square-wave signals can be interpolated 100-fold max. by means of
phase-locked control loops.
If the cable is longer than 50 m, the 0V signal lines
must be connected to 0V of the subsequent
electronics to increase noise immunity.
The permissible cable length depends on the scanning frequency and on the power supply.
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