GE IS220YAICS1A
GE IS220YAICS1A
GE IS220YAICS1A
GE IS220YAICS1A
GE IS220YAICS1A

GE IS220YDOAS1AJ | Mark VIe/VIeS Discrete Output Module – Field Service Notes

  • Model: IS220YDOAS1AJ
  • Alt. P/N: IS220YDOAS1A (base variant), IS420YDOAS1B (upgrade)
  • Product Series: GE Speedtronic Mark VIe / Mark VIeS
  • Hardware Type: 12-channel isolated relay output I/O pack
  • Key Feature: On-board coil/contact/fuse monitoring with SOE time-stamping
  • Primary Field Use: Controls solenoids, valves, and safety interlocks in turbine systems
Get a Quote
In Stock
Manufacturer:
Part number: IS220YDOAS1AJ
Our extensive catalogue, including : IS220YDOAS1AJ , is available now for dispatch to the worldwide. Brand:
The listed price is not final; the actual selling price is negotiable based on current market conditions.

Description

Hard-Numbers: Technical Specifications

  • Protocol Support: Dual IONet 10/100Mbps Ethernet (RJ45)
  • Output Channels: 12 Form C relay outputs
  • Contact Rating: 2A @ 30VDC / 1A @ 120VAC
  • Isolation Rating: 2500 VAC RMS field-to-backplane
  • Power Draw: 9 W max @ 28 VDC
  • Operating Temperature: -40°C to +70°C
  • Response Time: ~6 ms (command to output)
  • Diagnostics: 12 channel LEDs, fuse/coil/contact feedback
  • Terminal Board Compatibility: TRLYS1B, TRLYS1D, TRLYS1F
  • Dimensions: 138 x 86 x 56 mm
  • Weight: 0.9 kg (2 lbs)
  • Certifications: UL, CE, ATEX Zone 2, Class I Div 2
GE IS220YAICS1A

GE IS220YAICS1A

The Real-World Problem It Solves

Unmonitored outputs lead to undetected open circuits or stuck relays in turbine control. Missing a trip command causes catastrophic equipment damage and extended downtime. provides full loop verification to ensure output commands reach field devices.

Where you’ll typically find it:

  • Gas/steam turbine fuel stop solenoid control
  • Steam bypass valve and inlet valve actuation
  • Turbine supervisory and permissive interlock circuits

Bottom line: eliminates “command executed” blind spots in critical output loops.

 

Hardware Architecture & Under-the-Hood Logic

combines a dedicated processor with isolated relay drivers. Continuous feedback loops validate every output state against the commanded position.

  1. Redundant IONet receives output commands from the controller.
  2. On-board processor checks command integrity and redundancy vote.
  3. Dual drive circuits energize the selected relay coil.
  4. Opto-isolated feedback reads coil current and contact state.
  5. Processor compares commanded state vs. actual feedback.
  6. Mismatch triggers fault alarm and SOE event logging.
  7. 12 yellow front-panel LEDs indicate active output status.

 

Field Service Pitfalls: What Rookies Get Wrong

Inductive Load Spike DamageDirectly driving solenoids without suppression causes voltage spikes. Destroys relay contacts and damages on-board drive circuits.

  • Field Rule: Install flyback diodes (DC) or RC snubbers (AC) across all inductive loads.

Fuse Status IgnoranceDisregarding the 6-channel fuse monitoring. Blown fuses cut output power without obvious alarm.

  • Quick Fix: Configure system to alarm on fuse faults; verify fuses rated for 2A per channel.

Mixed Terminal Board WiringUsing non-TRLYS terminal boards breaks isolation and monitoring. Results in unreliable feedback and safety faults.

  • Field Rule: Only use TRLYS1B/D/F terminal boards; match wiring to GE schematic GEI-100863.
GE IS220YAICS1A

GE IS220YAICS1A

Commercial Availability & Pricing Note

Please note: The listed price is for reference only and is not binding. Final pricing and terms are subject to negotiation based on current market conditions and availability.

Related products