Woodward 9907-1213 TM Actuators (Linear)

If the microcontroller determines that the EEPROM is not responding correctly, a

trip occurs. The trip cause is annunciated as a hardware fault. If this type of fault

occurs, reset the unit. If the fault continues to occur, replace the unit and return it for repair.

If the microcontroller determines that the data in EEPROM has been corrupted,

the display shows "eeprom data lost". If this type of fault occurs, reset the unit. If

the fault continues to occur, replace the unit and return it for repair.

The microcontroller monitors an interlock signal which indicates that the internal

hardware cables are connected correctly. If this signal indicates a missing

interlock, a trip occurs. The cause of the trip is annunciated as an interlock fault.

If this fault occurs, check all cable connections.

Table 4-3 gives the maximum overload

protection for supply mains connected to any single or redundant pair of MicroNet Plus main power

supplies. It is not recommended that both MicroNet Plus main power supplies of a redundant pair be

connected to a single source, since failure of that source would disable the system.

Multiple chassis systems using MicroNet Plus power supplies may have power supplies of the same

model, but in different chassis, connected to the same source. In this case, each branch to a chassis

must have its own overcurrent protection sized according to Table 4-3. and the power source must be

sized for the sum of the branches.

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.