Features:
- Separates the simplex controller from customer contact wiring.
- Combines dedicated generator-status and lockout inputs with general I/O.
- Monitors relay actuation through coil-current and auxiliary-contact feedback.
The G2 arrangement sends its control path to M1 rather than duplicating connections across three controllers.
Input circuits use exciter-supplied wetting voltage, allowing dry field contacts to be supervised without an external sensing supply.
Output terminals separate protective trip duties from Form C general-purpose switching so each circuit can retain its intended load class.
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General Electric IS200ECTBG2A Exciter Contact Terminal Board Manuals, Datasheets, Links
Important Notice: Other accessories, manuals, cables, calibration data, software, etc. are not included with this equipment unless listed in the above stock item description. All prices are shown in USD.
Tracing the supervised contact paths
- 52G state: A closed generator contact represents the online condition at the dedicated input.
- 86G action: Opening the lockout contact produces the trip indication used during normal operation.
- Auxiliary points: Six additional customer contacts share the board’s supervised input architecture.
- Wetting source: The isolated 70 V dc supply comes from the exciter power system.
Keeping relay duties within their ratings
- Form C bank: Four changeover outputs serve annunciation and other general control functions.
- Trip contacts: Two separate relays are reserved for protective trip service.
- DC loads: The published break capacity changes with resistive or inductive load behavior.
- Transient control: Inductive devices need suppression at the load rather than relying on the terminal board.
Following command and proof signals
- Relay command: EMIO drives each general-purpose relay through the simplex control connection.
- Coil supervision: Current feedback reveals whether an energized relay coil actually carries current.
- Contact proof: An auxiliary contact reports mechanical relay state independently of the command.
- Cable identity: The simplex harness must return to its assigned M1 connector after service.
Restoring a simplex contact assembly
- De-energize: Isolate customer dc circuits and the exciter wetting supply before disturbing terminals.
- Mark conductors: Keep dedicated contacts, commons and normally open or closed leads distinguishable.
- Inspect terminals: Look for loosened ring lugs, damaged blocks and signs of dc switching heat.
- Functional test: Prove 52G, 86G, one general input and each required relay path before release.