Woodward 8404-7405 L-Series Speed Control–Actuator with ITB & Venturi Mixer (MAS)

Power requirements depend on the number and type of modules supplied for each system. For a system

with a single I/O chassis, size the input power source according to the rating of the MicroNet Plus power

supply to which the source is connected. Do not size the supply mains for the sum of the MicroNet Plus

power supply ratings when redundant supplies are used. MicroNet Plus supplies are redundant when

installed in the same chassis. Redundant supplies share the load between them equally, but each must

provide for full load in the event that one of the units is disabled. 

The ProTech system can be ordered in either a de-energize-to-trip model or an

energize-to-trip model.

Because Woodward recognizes that some installations will use energized-to-trip

models, all ProTech systems have been designed with components of the

highest quality and relays with operating characteristics that far exceed the

anticipated requirements of the device.

The ProTech system can also be configured to be compatible with various

combinations of power sources. Tables 1-1. 1-2. and 1-3 show the available

ProTech models, the corresponding part numbers, and the voltage ranges.

In the event that on supply needs to be replaced, the recommended method for changing

Power Modules is with the power off (to the module being removed and the module being inserted).

The system will tolerate this “cold swap” method without failure.

Each main power supply has four LEDs to indicate power supply health (OK, Input Fault,

Overtemperature, and Power Supply Fault).