3. Mechanical Installation
Models IS2x0145B to IS4x1000B and IS3x0255N to IS561600N are intended to be mounted in an enclosure which
prevents access except by trained and authorised personnel, and which prevents the ingress of contamination. The
complete range is designed for use in an environment classified as Pollution Degree 3 in accordance with IEC60664-1.
This means conductive pollution or dry, non-conductive pollution which becomes conductive due to condensation is
acceptable.
It is the installer's responsibility to ensure that any enclosure which allows access to models IS2x0145B to IS4x1000B
and IS3x0255N to IS561600N while the product is energized, provides protection against contact and ingress
requirements of IP20.
Models IS2x0145B to IS3x0255B can be installed with optional finger guards, in which case they do not need to be
mounted in an enclosure.