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Allen-Bradley 1771-PS7 С Series Installation Data page 6

120/220v ac power supply with user power

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6
When mounted separately, the 1771-PS7 may be mounted above or next to
the I/O chassis. It may not be mounted below, since it is necessary to
allow convection cooling of both the power supply and the I/O chassis.
A minimum vertical distance of six inches should be maintained.
To attach the 1771-PS7 to a rack-mounted I/O chassis (1771-A3B):
1.
Mount the 1771-PS7 vertically, above and within the specified
cable-feet (for your cable) of the D-sub connector on the top of the
I/O chassis.

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