3
INM9491 Rev 3
3 DIN-RAIL INSTALLATION METHOD
This section deals with mounting the individual 9491-PS power supplies on DIN rail, for backplane
mounting see Section 4.
WARNING: If this module is to be connected to intrinsically safe apparatus, it must be installed,
operated and maintained only be trained competent personnel and in accordance with all
appropriate international, national and local standard codes of practice and site regulation and in
accordance with the instructions contained here. See also Sections 7, 8 and 9 for approvals and
important conditions of safe use.
3.1 Protection of equipment
When the power supply is mounted in a safe area ensure that the local environment is clean and
free of dirt and dust and note the ambient temperature considerations given in Section 5.
WARNING: When mounted in a Zone 2 hazardous area the module must be protected by a
suitably certified enclosure.
3.2 DIN rail mounting
Mount the
9491-PS power supplies
on low-profile (7mm) or high-profile (15mm) type T35 (top-hat) DIN-
rail to EN50022, BS5584, DIN46277; this is available from Eaton, in 1 metre lengths (THR2 DIN rail).
It is recommended that, in normal practice, the DIN rail is earthed to ensure personnel safety in the event
of mains being put accidentally on the rail.
See Figure 3.1 for power supply dimensions.
Figure 3.1
9491-PS package
dimensions
& connections
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