Sigma II User’s Manual Chapter 2: Installation
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2.2.3 Orientation
Install the servo amplifier perpendicular to the wall as shown in the figure. The
servo amplifier must be oriented this way because it is designed to be cooled by
natural convection or by a cooling fan.
Secure the servo amplifier using the mounting holes. The number of holes varies
(from two to four) with the frame size of the servo amplifier.