IS200EGDMH1A

Overview

The IS200EGDMH1A is an Exciter Ground Detector Module from GE. It is part of GE's industrial automation product portfolio.

Application & Technical Notes

As an exciter ground detector module, the IS200EGDMH1A is intended for deployment in panel-based control cabinets and machine enclosures where the GE product portfolio equipment is installed. It performs a defined automation function within the control system and is selected to match the installed GE platform.

Key published characteristics include an operating temperature range of -30 to 65 o C. These values should be confirmed against the current manufacturer datasheet before final selection, as options and suffixes vary by configuration.

Maintenance & Diagnostics

Respect the published operating temperature window (-30 to 65 o C); do not exceed it during commissioning or in enclosed panels without airflow. Verify field wiring, shielding and grounding at installation; check terminal torque and confirm signal types match the configured range. Periodically inspect for loose terminations, induced noise and channel-level diagnostics reported by the controller. Always de-energise the circuit and follow lock-out/tag-out before handling; refer to the official instruction bulletin for service procedures.

Sourcing & Procurement

When sourcing the IS200EGDMH1A, distinguish three supply tiers: (1) genuine GE stock from an authorised distributor; (2) compatible equivalents or surplus/NOS (new-old-stock) from third parties; (3) alternative parts offering equivalent function. Genuine supply carries the full warranty and traceability; compatible or alternative items may be cheaper but should be validated for form, fit, firmware and certification before use in a live system. PLCXpert publishes this page as an independent reference and does not sell the part — verify every claim with the manufacturer or your distributor.

Confirm the module matches your GE product portfolio rack, the required channel count, signal type and voltage, and the firmware/configuration of the controller. Lead times and pricing vary by region and lifecycle status; obtain a current quote from an authorised channel rather than relying on stale listings.

Check live stock, lead time and request a quote for IS200EGDMH1A → (opens in a new tab)

Frequently Asked Questions

Specifications

SPECIFICATIONS: Part Number: IS200EGDMH1A Manufacturer: General Electric Series: EX2100 Product Type: Exciter Ground Detector Module Operating Temperature: -30 to 65 o C Repair: 3-7 Days Country of Origin: USA Availability: In Stock Manual: GEI-100467 FUNCTIONAL DESCRIPTION: IS200EGDMH1A is an Exciter Ground Detector Module manufactured and designed by General Electric as part of the EX2100 Series used in Excitation Control Systems. It mounts in the Exciter Power Backplane rack as a double slot, double height (6U) form factor board (EPBP). The field ground detector measures the resistance in the field between any point in the field circuit of the generator and the ground, whether it is on the ac or dc side. A redundant system will have three EGDMs, but a simplex system will have one. Figure 1 displays the position of the EGDM(s). In order to communicate with the EGDM(s), EXAM, the attenuator module, measures the voltage across the ground sensing resistor. The High Voltage Module, which is housed in the Auxiliary Panel, has the EXAM module mounted in it. EGDM and Attenuator Module Mounting Fig 1: EGDM and Attenuator Module Mounting The trio of EGDM boards is set up as Controller (C), Master 1 (M1), and Master 2 (M2) in a redundant control (M2). A group of program pins on the P2 connector control each EGDM's setup. The DSPX transmits data to EGDM C via the EISB in the controller rack about which the master delivers the driving signal to the sensing resistor in the Attenuator Module. When C receives this data through the fiber-optic link, depending on whether M2 is the selected driver or M1 is the selected master, C either powers or empowers the relay in the Attenuator Module. A differential signal that identifies the selected master is simultaneously transmitted to M1 and M2. This signal selects the test command source on each module and activates the signal generator on the active master (M1, M2, and C). The active master now gets an oscillator signal from the DSPX via the EISB across the fiber optic link, which it transforms into a positive or negative 50-volt signal. This square wave voltage is applied to one end of the sense resistor after being transmitted via cable to the EXAM module. Ground Detector Functional Block Diagram Fig 2: Ground Detector Functional Block Diagram The Sense Resistor in the EXAM module sends an attenuated (10:1) differential signal to the signal conditioner. A straightforward unity gain differential amplifier with a high common-mode rejection ratio serves as the signal conditioner, which is followed by an A-to-D converter (Voltage Controlled Oscillator VCO). A fiber optic transmitter is fed by the VCO. Due to the high common-mode voltage at the sense resistor, the signal conditioner circuitry is powered by an isolated power source to protect worker and equipment safety. When instructed to do so by the control section, the signal conditioner grounds the bridge side of the attenuated Sense Resistor and uses this information to determine the power amplifier output level. IS200EGDMH1A Technical Specifications

Reproduced from the manufacturer's published data. Values marked "Not available" are absent from the source document.

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