Manual 26166V1 MicroNet Simplex & MicroNet Plus
Woodward 15
2.1.3—Redundant Power Supplies
Two load sharing power supplies provide redundant power to the motherboard, CPU and I/O modules. The
MicroNet Plus power supplies are 2-slot wide each and are located at each end of the chassis in the
designated PS1 and PS2 slots.
2.1.4—Simplex Inputs and Outputs
Each I/O module has connectors on the faceplate. For analog and discrete I/O, cables connect the module
to a Field Terminal module (FTM). The FTM is used to connect to the field wiring. For communication
modules, FTMs are not used. Cables are connected directly to the faceplate of the communications module.
The following diagram shows the flow of analog and discrete inputs from the field to the application.
Figure 2-2. Input Flow
Figure 2-3. Output Flow
2.1.5—Redundant Inputs and Outputs
Two levels of redundancy are available. The first involves wiring two external input devices to two separate
input channels. See Figure 2-3. In the event of a failed sensor or a failure in the connection from the sensor
to the control, a valid input is still available
Figure 2-4. Redundant Sensors
The second level is wiring two external input devices to two separate I/O modules. See Figure 2-4. In the
event of a failure in one of the sensors, connections, cables, FTMs, or I/ O modules, a valid input is still
available.
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