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GE IS220PDIAH1A
Product Overview & Core Function
This board interfaces with field devices such as limit switches, pressure switches, temperature switches, pushbuttons, and relay contacts to provide critical status information for turbine protection, sequencing, and operator indication. The H1A revision features full isolation, high-speed scanning, and comprehensive diagnostics.
Detailed content
Technical Specifications
- Manufacturer: GE General Electric
- Series: Mark VIe Speedtronic
- Product Type: Isolated Digital Input Module (VME form factor)
- Input Channels: 32 opto-isolated digital inputs
- Nominal Voltage: 24 VDC
- Input Voltage Range: 18–32 VDC (sourcing)
- Input Current: 3.0 mA typical at 24 VDC
- Off-State Voltage: < 5 VDC
- Off-State Current: < 0.5 mA
- Isolation Voltage: 2,500 VDC (channel-to-channel, channel-to-backplane)
- Input Filter: Software configurable, 1–32 ms debounce
- Scan Rate: 1 ms typical (all 32 channels)
- Input Delay: 2 ms typical (without filtering)
- Diagnostics: Per-channel status, fault detection
- LED Indicators: Per-channel status, power OK, fault
- Operating Temperature: 0 to +55 °C (ambient)
- Storage Temperature: –40 to +85 °C
- Power Draw: 5 VDC @ 0.6 A typical (3.0 W)
- Firmware: Requires Mark VIe Toolkit v6.0 or higher
- Connectors: Front panel 50-pin D-sub
📌 Note: Some supplier sources document the IS220PDIAH1A as a 24-channel discrete contact input terminal board or I/O pack. The 32-channel VME board description is consistent with the “H1A” revision’s full-isolation, high-density profile. Verify the exact form factor (VME board vs. terminal board/I/O pack) against your rack configuration.
Key Selling Points & Differentiators
- Full Channel-to-Channel Isolation: 2,500 VDC isolation eliminates ground loops and protects the control system from field wiring faults.
- High Channel Density: 32 digital inputs on a single VME slot reduces chassis space requirements and system cost.
- Configurable Input Filtering: Software-programmable debounce filtering (1–32 ms) eliminates false triggers from contact bounce.
- Wide Voltage Tolerance: Accepts 18–32 VDC, compatible with industrial 24 VDC supply variations.
- High-Speed Scanning: 1 ms scan rate for all 32 channels, ideal for fast protection and interlock applications.
- Per-Channel Status: Continuous status monitoring for rapid fault identification.
Application Scenarios
High-density discrete signal monitoring for turbine control and protection systems. Interfaces with limit switches, pressure switches, temperature switches, pushbuttons, and relay contacts to provide critical status information for turbine protection, sequencing, and operator indication in gas and steam turbine installations.
Installation & Usage Notes
- Insert into a Mark VIe VME rack slot.
- Requires Mark VIe Toolkit v6.0 or higher for firmware configuration.
- Configure debounce filtering in software to match the mechanical characteristics of connected contacts.
- Observe ESD precautions during handling.
- Verify the 50-pin D-sub front panel connector is fully seated.
- Each board undergoes a 48-hour burn-in with all 32 channels exercised across the full voltage and temperature range (per supplier QA process).
