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The system Power switch and the controlled North American
3-prong grounded outlet are located on the rear panel as
shown in Figure 3.2-3.
Figure 3.2-3: Control Unit rear panel
The Power switch, Fuse and AC line cord are separate
components that control the power input to the Model 5112
Controller. The AC line cord is a standard North American 3-
prong grounded type, 8” (2.5m). The Model 5112 contains a
universal power supply that operates from 90-260VAC,
50/60Hz. Optional line cords are available to conform to the
requirements of other countries when ordered with the
Controller. Otherwise, the user must use either an adapter or
cut off the plug and install the appropriate type.
The ON/OFF switch located on the rear panel, controls the
ON/OFF status of the Controller. The AC line fuse is located
internally on the PC board and protects both the controller
electronics, and the solid-state relay. It is a 3AG Slo Blo type
rated at 250 Volts, 2 Amps. The solid-state relay is not
voltage dependent and is capable of switching a maximum
of 3 Amps at either voltage, however, for extra protection a 2
Amp fuse is installed.
This AC output receptacle accepts the standard 3-prong
North American grounded plug. When the measured
humidity exceeds the humidity level set point by about 1%
R.H., 115/230 VAC power is applied to the receptacle.
