1.1.6 Electrical wiring - control cables
Illustration 1.1: Diagram showing all electrical terminals without options.
Terminal 37 is the input to be used for Safe Stop. For instructions on Safe Stop installation please refer to the section
Safe Stop Installa-
tion
of the Design Guide.
* Terminal 37 is not included in (Except A1, which includes Safe Stop).
Terminal 29 and Relay 2, are not included in .
Very long control cables and analogue signals may in rare cases and depending on installation result in 50/60 Hz earth loops due to noise from mains
supply cables.
If this occurs, it may be necessary to break the screen or insert a 100 nF capacitor between screen and chassis.
The digital and analogue inputs and outputs must be connected separately to the common inputs (terminal 20, 55, 39) of the frequency converter to
avoid ground currents from both groups to affect other groups. For example, switching on the digital input may disturb the analog input signal.
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