PACSystems RX3i - Enclosures; Installing the PSM Module; Installing the Terminal Assembly

User Manual Chapter 2
GFK-2749A Jan 2020
Installation 19
WARNING
This equipment is suitable for use in Class I, Division 2, Groups A, B, C and D , Zone 2, OR
non-hazardous locations only.
EXPLOSION HAZARD – Do not disconnect equipment unless power has been removed or
the area is known to be non-hazardous.
EXPLOSION HAZARD - Substitution of components may impair suitability for Class I, Division
2 or Zone 2 Areas.
2.2 Enclosures
The Terminal Assembly and PSM module are considered open equipment (having live
electrical parts that may be accessible to users) and must be installed in a protective
enclosure or incorporated into other assemblies manufactured to provide safety. As a
minimum, the enclosure or assemblies shall provide a degree of protection against solid
objects up to 12mm (e.g. fingers). This equates to a NEMA/UL Type 1 enclosure or an IP20
rating providing at least a pollution degree 2 environment.
When this system is installed into an area designated as Class 1 Zone 2 in Europe,
compliance with the ATEX Directive requires an enclosure with a minimum rating of IP54.
The enclosure must be able to adequately dissipate the heat generated by all components
mounted inside so that no components overheat. Heat dissipation is also a factor in
determining the need for enclosure cooling options such as fans and air conditioning.
2.3 Installing the PSM Module
CAUTION
Due the nature of the power systems monitored by the PSM system, careful consideration
must be given to the effects on these systems before the PSM module is either hot-removed
or hot-inserted into the host controller backplane.
The PSM module must be installed in a main (CPU) rack in an RX3i system. For system level
installation information, refer to the PACSystems RX3i System Manual, GFK-2314. The
IC694PSM001 Module can be hot-swapped in an RX3i backplane.
2.4 Installing the Terminal Assembly
The Terminal Assembly must be securely installed on a rigid, conductive, 12 – 14-gauge
steel panel using four user supplied M4 - M5 or #8 - #10 SAE bolts. The Terminal Assembly
should be mounted near the host controller rack containing the PSM module, close enough
to accommodate the 2-meter interface cables provided.