Woodward 505HT, Инструкция по установке и эксплуатации

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Manual 35116 505HT for Pelton Turbines
Woodward 8
IOLOCK. When a CPU or I/O module fails, watchdog logic drives it
into an IOLOCK condition where all output circuits and signals are
driven to a known de-energized state as described below. The
System MUST be designed such that IOLOCK and power OFF states
will result in a SAFE condition of the controlled device.
•
CPU and I/O module failures will drive the module into an
IOLOCK state
•
CPU failure will assert an IOLOCK signal to all modules and
expansion racks to drive them into an IOLOCK state.
•
Discrete outputs / relay drivers will be non-active and de-
energized
•
Analog and Actuator outputs will be non-active and de-
energized with zero voltage or zero current.
The IOLOCK state is asserted under various conditions including
•
CPU and I/O module watchdog failures
•
Power Up and Power Down conditions.
•
System reset and hardware/software initialization
•
Entering configuration mode
NOTE: Additional watchdog details and any exceptions to these
failure states are specified in the related CPU or I/O module section
of the manual.
Emergency
Disconnecting
Device
An emergency switch or circuit breaker shall be included in the
building installation that is in close proximity to the equipment and
within easy reach of the operator. The switch or circuit breaker shall
be clearly marked as the disconnecting device for the equipment.
The switch or circuit breaker shall not interrupt the Protective Earth
(PE) conductor.
Risk of Calibration
and Checkout
The calibration and checkout procedure should only be performed by
authorized personnel knowledgeable of the risks posed by live
electrical equipment.
Fuse Power Supply
Mains
The Power Supply MAINS should be properly fused according the
NEC/CEC or Authority Having Final Jurisdiction per the Input Power
Specifications.
Released