Description
Key Technical Specifications
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Model Number: 5X00489G01
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Manufacturer: Emerson (formerly Westinghouse)
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Function: 8-channel isolated analog output module + 24 VDC power-distribution module (PDM)
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Output Channels: 8 isolated AO, individually configurable: 4-20 mA, 0-20 mA, 0-10 V, ±10 V
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Resolution / Accuracy: 16-bit D/A, ±0.1 % full scale
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Load Drive: 4-20 mA into 750 Ω max; voltage into 2 kΩ min
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Update Rate: ≤ 10 ms per channel
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Isolation: 2 kV channel-to-channel & channel-to-backplane
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PDM Section: 100-240 VAC in, 24 VDC @ 40 A out, over-current & under-voltage protection
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Power Consumption: 5 W (module)
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Operating Temperature: –40 °C…+70 °C
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Dimensions / Weight: 125 × 100 × 30 mm, 0.25 kg
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Mounting: DIN-rail or 19-inch Euro-card slot (Ovation chassis)
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Status Indicators: LED per channel (output active), RUN, FAIL, COMM A/B
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Status: Factory discontinued – new & tested spares available
WESTINGHOUSE 1C31204G01
Field Application & Problem Solved
In combined-cycle plants the biggest headache is getting both rock-steady 4-20 mA signals to I/P converters and a bullet-proof 24 VDC bus to contactors without stuffing two cards in the rack. The 5X00489G01 solves both: the AO section drives eight valves or servo amps while the built-in PDM delivers 40 A of 24 VDC to field devices. You’ll typically find one per valve rack on Frame-7/9 peakers—swap time is under two minutes with the unit on turning gear. Core value: it collapses eight precision current sources, a 24 VDC power supply, and surge protection into one 0.25 kg plug-in module you can carry in your pocket .
In combined-cycle plants the biggest headache is getting both rock-steady 4-20 mA signals to I/P converters and a bullet-proof 24 VDC bus to contactors without stuffing two cards in the rack. The 5X00489G01 solves both: the AO section drives eight valves or servo amps while the built-in PDM delivers 40 A of 24 VDC to field devices. You’ll typically find one per valve rack on Frame-7/9 peakers—swap time is under two minutes with the unit on turning gear. Core value: it collapses eight precision current sources, a 24 VDC power supply, and surge protection into one 0.25 kg plug-in module you can carry in your pocket .
Installation & Maintenance Pitfalls (Expert Tips)
Loop Power Comes from the Card – Don’t Double-Source
The AO section sources 24 V compliance. If your positioner also sources power you’ll fight the regulator and the output drifts. Break the loop at the junction box and verify only one power source is active.
The AO section sources 24 V compliance. If your positioner also sources power you’ll fight the regulator and the output drifts. Break the loop at the junction box and verify only one power source is active.
PDM Input Fuse Is Potted – Don’t Blow It
The 40 A mains fuse is under conformal coat; short the 24 V bus and the module is scrap. Always megger the field cables before first power-up; a grounded fan lead will blow the fuse and you’ll chase a “supply fail” that can’t be field-repaired.
The 40 A mains fuse is under conformal coat; short the 24 V bus and the module is scrap. Always megger the field cables before first power-up; a grounded fan lead will blow the fuse and you’ll chase a “supply fail” that can’t be field-repaired.
AO Update Rate Is 10 ms – Don’t Use for Trip Logic
The module updates every 10 ms—fine for modulation but too slow for turbine trip solenoids. Use the companion high-speed DO card (5X00499G01) for ≤1 ms trip functions.
The module updates every 10 ms—fine for modulation but too slow for turbine trip solenoids. Use the companion high-speed DO card (5X00499G01) for ≤1 ms trip functions.
Spare Lead-Time Is 6-8 Weeks – Keep One on the Shelf
Factory stock is gone; new & tested spares are available but not overnight. If you crack a layer or burn the 24 V rail you’ll be down until the part arrives—keep one in stores or you’ll discover the weakness during the next grid event.
Factory stock is gone; new & tested spares are available but not overnight. If you crack a layer or burn the 24 V rail you’ll be down until the part arrives—keep one in stores or you’ll discover the weakness during the next grid event.
WESTINGHOUSE 1C31204G01
Technical Deep Dive & Overview
Internally the module is a 16-bit DAC bolted to a 2 kV isolation barrier. The AO section uses a PWM current source with on-board sense resistors; the PDM section is a forward-converter SMPS that delivers 24 VDC at 40 A. Both sections share the same back-plane connector but are galvanically isolated. Lose the 24 V rail and the whole module goes dark; lose a single AO channel and the CPU throws “AO FLT” for that channel only. No firmware to reload—pure hardware—so you can hot-swap it: pull the old module, slide the new one in until the latch clicks, and the DCS sees all eight channels again in under ten seconds.
Internally the module is a 16-bit DAC bolted to a 2 kV isolation barrier. The AO section uses a PWM current source with on-board sense resistors; the PDM section is a forward-converter SMPS that delivers 24 VDC at 40 A. Both sections share the same back-plane connector but are galvanically isolated. Lose the 24 V rail and the whole module goes dark; lose a single AO channel and the CPU throws “AO FLT” for that channel only. No firmware to reload—pure hardware—so you can hot-swap it: pull the old module, slide the new one in until the latch clicks, and the DCS sees all eight channels again in under ten seconds.
