Woodward MicroNet Simplex - Figure 9-11. Simplex System Configuration Example

Manual 26166V1 MicroNet Simplex & MicroNet Plus
Woodward 120
Figure 9-11. Simplex System Configuration Example.
Speed Inputs
Each of the module’s four speed channels accept either a passive magnetic pickup unit (MPU), Prox or
Eddy probe. The number of MPU, Prox and Eddy inputs per module is determined by GAP software.
Prox or Eddy probes may be used to sense very low speeds. With a Prox probe, speed can be sensed
down to 0.04 Hz. See Figure 9-74 for MPU and Prox probe wiring examples. Unused inputs should be set
to MPU2K mode and jumpered at the FTM.
It is not recommended that gears mounted on an auxiliary shaft
coupled to the rotor be used to sense speed. Auxiliary shafts tend to
turn more slowly than the rotor (reducing speed sensing resolution)
and have coupling gear backlash, resulting in less than optimum
speed control. For safety purposes, it is also not recommended that
the speed sensing device sense speed from a gear coupled to a
mechanical drive side of a system’s rotor coupling.
When configuring the AI_SS block in GAP, set PROBE_TYPE input
field to:
0 - for all inputs working in MPU2K mode
1 - for all inputs working in MPU10K mode
2 - for all inputs working in PROX mode
3 - for all inputs working in Eddy mode
This will allow the input to correctly sense the output signal from
specified probe type.
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