Emerson MultiFlex RTU, Installation And Operation Manual

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16 • MultiFlex RTU Operator’s Guide 026-1706 Rev 3
4.3. Analog Outputs
The MultiFlex RTU analog outputs are
+0-+10VDC points used for controlling
variable-position economizers and variable-
speed fans. The maximum output current for
each point is 10 milliamps.
Unlike most of the RTU inputs and outputs, the
two analog points are not pre-defined. To enable
them for use in economization or fan control,
they must be assigned in the RTU.
Figure 4-8
shows the location of the analog outputs.
4.3.1. Wiring the RTU Analog
Output Points
The analog outputs have no hardware-based fail-
safe settings (fail-safes are set in the board
firmware by setting either “fan speed on failure”
or “economizer% on failure”). All that is
required to connect a device to an analog point is
to connect the “+” terminal to the positive wire
on the device and the “-” terminal to the negative
(or ground) wire of the device.
Figure 4-8 - MultiFlex RTU Analog Output Locations