Woodward 505HT, Installation And Operation Manual

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Manual 35116 505HT for Pelton Turbines
Woodward 40
DI, Contact Power (CPWR) wiring checks
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CPWR(+) is an output voltage, it should never be connected to any other supply.
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To maintain node isolation, verify CPWR(–) is not shorted to PS(–).
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Using the internal isolated Contact Power output (CPWR,COM) is highly recommended to maintain
discrete input isolation for other plant devices /controls
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Verify CPWR(+) is not connected to CPWR(–), PS(–), EARTH.
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Verify CPWR(–) is not connected to CPWR(+), PS(+), EARTH.
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Verify CPWR voltage meets spec at the terminal block (18 to 32 V dc).
DO Relays, Relay wiring checks
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Verify each Relay output (NO, C, NC) contact is connected to the load properly
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Verify each Relay output (NO, C, NC) is not shorted to another output channel.
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Verify the function of each Relay output (NC, NO) wiring by driving each output ON then OFF. Verify
the GAP software detects the readback state change.
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When possible, consider using shielded wiring for relay cables.
Additional wiring checks when using RTCnet/LINKnet nodes
TC, Thermocouple Input wiring checks
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Verify each TC(+,–) is not shorted to another input channel.
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Verify each TC(+) terminal is not shorted to PS(+), PS(–), EARTH.
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Verify each TC(–) terminal is not shorted to PS(+), PS(–), EARTH.
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Verify each TC shield wire is not shorted to PS(+), PS(–).
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Verify no wires are landed accidently on the NC, no-connect terminals.
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Verify each TC shield wire is terminated at the node properly.
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Functionally verify the wiring for each TC channel using a simulator source.
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TC OPENS: A TC input will read MAX DegC if the (+) or (–) wire is broken / open.
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TC SHORTS: A TC input will read 0 DegC if the (+) and (–) wires are shorted.
GROUND FAULTS: Input channels accidently shorted to EARTH will
be more susceptible to spurious noise events related to the
installation and environment.
RTD, Input wiring checks
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Verify each RTD(+,–) is not shorted to another input channel.
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Verify each RTD(+) terminal is not shorted to PS(+), PS(–), EARTH.
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Verify each RTD(–) terminal is not shorted to PS(+), PS(–), EARTH.
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Verify each RTD(sense) terminal is not shorted to PS(+), PS(–), EARTH.
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Verify each RTD(sense) terminal is connected properly for 3-wire sensors.
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Verify each RTD(sense) terminal is jumpered to RTD(–) for 2-wire sensors.
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Verify each RTD shield wire is not shorted to PS(+), PS(–).
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Verify each RTD shield wire is terminated at the node properly.
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Functionally verify the wiring for each RTD channel using a simulator source.
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RTD OPENS: RTD channels will read MAX DegC if the (+) or (–) wire is broken.
Released