Overview
For installations that must meet closed system requirements as defined in EN 61131-2 (without relying upon an external enclosure) in which an external line filter is used, it must be protected by a separate enclosure that meets the requirements of IEC 529, Class IP20.
AC/DC Installation
The following figure shows an AC/DC powered systems that meets CE closed system compliance.

* Only one ground wire per rack is required. In redundant and summable systems, this lead is not connected for the additional line filter/power supply
** Connectors 140 XTS 005 00 (for power supplies) and 140 XTS 001 00 (for I/O modules) must be ordered separately
Protective Cover
The protective cover must completely enclose the line filter. Approximate dimensions for the cover are 12.5 x 7.5 cm. Wire entry/exit shall be through strain relief bushings.
Line Filter Connections
