ABB 6402U-500 Manual De Instrucciones página 72

Installation
• The maximum line length depends on the maximum
permissible ripple voltage at the extension inputs. How-
ever, the ripple voltage must not exceed 100 V (in practice,
this corresponds to a line length of at least 100 m).
The following can be used as an extension:
- NO-contact pushbutton (e.g., 2020 US or 2021/6 UK)
CAUTION
Illumination of the pushbutton extension parallel to
the switching contact is not permissible; use
pushbuttons with separate "N" terminal.
To ensure optimum operation, lay switched lines sepa-
rately to the extension lines.
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GB
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