IS2020DRLYH1A GE

Key Specifications

Advantages & Distinctive Features

• Higher Contact Rating: 6 A continuous (versus 5 A on WROBH1A) — handles larger loads.

• Higher Inrush Capability: 12 A for 150 ms (versus 10 A for 100 ms) — supports larger solenoids and motors.

• Integrated AC Snubbers: Built-in snubber circuits for AC inductive loads—eliminates external components, reduces wiring, and extends contact life.

• Contact Resistance Monitoring: Tracks contact resistance over time—identifies pitted or worn contacts before failure.

• Longer Electrical Life: 150,000 operations at rated load (versus 100,000) — reduces maintenance frequency.

• Conformal Coating Standard: Protects against humidity, salt spray, and chemical vapors.

• Extended Temperature Range: –25 °C to +70 °C operation.

• Expanded Fault Logging: 750-event log with timestamps.

• Captive Washer Terminals: Prevents screw loosening due to vibration.

• Hot-Swappable: No rack power-down for replacement.

• Direct Retrofit: Replaces WROBH1A series boards with enhanced capabilities.

Application Fields

• Gas Turbines: Solenoid control, motor starters, valve actuation, alarm annunciation

• Steam Turbines: Trip solenoid control, motor starters, drain valve control

• Compressors: Motor starters, solenoid control, surge control valves

• Generators: Alarm annunciation, motor starters, synchronizing control

• Balance of Plant: Pump control, fan starters, filter differential pressure alarms

• Offshore platforms: Salt-spray environments requiring conformal coating

Comparison with WROBH1A and Competitors

The GE IS2020DRLYH1A offers superior contact rating, inrush capability, integrated AC snubbers, and contact resistance monitoring—making it the ideal relay output solution for demanding turbine control applications.

Selection Guidelines

• When to choose: Any Mark VIe application requiring high-current relay outputs—especially where 6 A rating, AC inductive loads, or contact resistance monitoring is beneficial.

• Load Verification: Verify each load ≤6 A continuous; ≤12 A inrush. Integrated AC snubbers handle most inductive loads—verify compatibility with large motors.

• Contact Resistance Monitoring: Use Toolbox ST to track contact resistance trends—increasing resistance indicates contact wear.

• Wiring: Use appropriate wire gauge (14–18 AWG) for load currents.

• Compatibility: Fits all Mark VIe VME64x racks. Requires ControlST v6.5 or higher for full features.

Operational Precautions

1. Wiring: Follow GE wiring diagrams—correct polarity for DC loads. AC loads use integrated snubbers—no external components needed.

2. Load Testing: Test each output with actual load during commissioning—verify contact resistance baseline.

3. Contact Resistance Monitoring: Review contact resistance trends in Toolbox ST—replace relays when resistance doubles from baseline.

4. Inrush Current: Ensure inrush current does not exceed 12 A per channel—excessive inrush can weld contacts.

5. LED Diagnostics: Green = commanded ON; Amber = commanded OFF; Red = fault. Refer to GEH-6920 for blink codes.

6. Fault Log: Access 750-event log via Toolbox ST for post-event analysis.

7. Coating Care: Use GE-approved cleaner; inspect annually under UV.

8. Hot-Swap: Remove/insert slowly under power—processor auto-recognizes new module.

9. Spare Stock: Maintain 1 spare per 3–4 racks.

10. Annual Verification: Cycle relays during outages; verify switching times and contact resistance.

11. Firmware Updates: Ensure the GE IS2020DRLYH1A is in “standby” mode during updates.

12. ESD: Handle by edges only with grounded wrist strap—coating does not protect connectors.

13. Storage: Anti-static bag with desiccant at –40 to +85 °C; rotate every 3 years for coating inspection.