GE IS2020RKPSG3A VME Rack Power Supply Module,

Description

Hardware & Electrical Specifications

‑ Model：IS2020RKPSG3A ‑ Part Number：IS2020RKPSG3A ‑ Module Type：VME Rack Power Supply Module ‑ Mounting：Mounted on right side of Mark VI VME control rack via metal bracket ‑ Input：Nominal 125 VDC, operating range 90‑145 VDC, max input current 4.0 A full‑load ‑ Total output power：400 W ‑ Output rails：+5 VDC, ±12 VDC, ±15 VDC, +28 VDC, specialized 335 VDC for flame detector circuits; multiple remote +28 V PSA auxiliary outputs ‑ Front‑panel control：Locking toggle switch for power ON/OFF and fault reset ‑ Front‑panel indicators：Green(Power OK), Yellow(Input status), Red(Fault alarm) ‑ Connector：PSA / PSB harness to VME backplane; PS125 input, PS335, PS28, PSSTAT status signal connectors at bottom ‑ PCB treatment：Conformal coated for dust‑moisture‑corrosion resistance ‑ On‑board protection：Over‑voltage, over‑current, short‑circuit, thermal shutdown protection, built‑in power‑loop self‑diagnosis, status‑ID signal output to rack monitoring ‑ Compatibility note：Cannot run standalone; must match Mark VI VME rack backplane and system distribution hardware; full power‑loop test mandatory after replacement.

Environmental Specifications

‑ Operating temperature：0 ℃ ~ +60 ℃ ‑ Storage temperature：‑40 ℃ ~ +85 ℃ ‑ Relative humidity：5%‑95% non‑condensing ‑ Installation location：Indoor turbine control cabinet ‑ EMC compliance：IEC 61000‑6‑2 ‑ Certifications：CE, UL Class I Div 2 hazardous‑location certification

Mechanical Data

‑ Weight：approx 7.1 kg ‑ Dimension：330 × 180 × 385 mm ‑ Handling note：ESD‑sensitive power module, contains high‑voltage 335 VDC circuit; anti‑static wrist‑strap mandatory during handling ‑ Terminal tightening torque：0.6‑1.0 N·m

Main Functions

1. Accepts 125 VDC cabinet system input, converts and provides multi‑channel stabilized DC power for VME rack controller boards, signal I/O cards.
2. Provides dedicated 335 VDC power supply for flame detector detection circuit of gas turbine.
3. Supplies multiple remote +28 V auxiliary power outputs for external field peripherals.
4. Real‑time monitors input voltage, each output rail status, over‑temperature and fault conditions; outputs status‑ID diagnostic signal to rack monitoring system.
5. Built‑in complete hardware protection: over‑voltage, over‑current, short‑circuit and thermal protection to avoid secondary damage to rack boards.
6. LED status indication:   ‑ Green LED：Module power supply normal   ‑ Yellow LED：Input power presence indicator   ‑ Red LED：Module fault / protection shutdown alarm

Installation & Wiring Requirements

1. Completely cut off 125 VDC input power before replacement. Hot‑swap is forbidden. Strict anti‑static protection when handling power module.
2. Securely install module on right‑side bracket of VME rack, fasten mounting screws; correctly connect PSA/PSB backplane harness and bottom input/output cables.
3. Wiring strictly follow GE Mark VI hardware manual; separate high‑power power cables from small‑signal control cables, connect shielding to dedicated protective ground terminal.
4. Complete protective grounding according to GE system specification.
5. After replacement: step‑by‑step power‑on, verify all output rail voltage values, check front‑panel LED status, perform fault simulation test.
6. Replacement note: For TMR triple‑redundant rack application, verify hardware consistency; full power‑supply‑loop simulation test mandatory before unit put‑into‑service.