Rockwell Automation 1797-PS1N FLEX Ex 85-250V AC In/Quad-Ex DC Out Power Supply - Manual (Page 7)

FLEX Ex 85…250V ac In/Quad-Ex dc Out Power Supply 7
Publication 1797-5.34 - September 2011
Mount the 1797-PS1N Power Supply
The 1797-PS1N power supply provides pre-tapped 1 in. NPT (National Pipe
Thread) conduit entrance and exit holes. Depending on your local
requirements, the hazardous conduit entrance could be through hard conduit
or semi-flexible continuous conduit with poured seals from the safe area.
Similarly, the IS power exit could be through poured seals or the like.
The power-supply output wires are IS and require only normal IS treatment
once they are sealed at the power supply exit.
1. Unscrew the cover of the power supply to access the input and output
terminals.
2. Thread the blue IS-safe output power wiring through the IS power
exit seal.
3. Connect the blue IS-safe output power wiring to the output terminals
making sure all connections are tight.
These power supply outputs provide the input power to the FLEX Ex
modules.
4. Thread the hazardous incoming power wiring through the conduit, or
allowed piping, and the hazardous power entrance seal.
ATTENTION
• Conduit seals must be installed at the entry of the enclosure
(FM) or within 150 mm (6 in.) of the enclosure (UL).
• Use star washers and nuts to make sure you have a good
electrical connection. Scrape the paint off the back panel in
those areas where grounding bolts will be located.
• Once power has been applied, wait 15 minutes after
disconnecting before opening the cover.