The GE IS220PRTDH1A Input Output Pack provides RTD temperature sensing for Mark VIe systems. This I/O pack connects directly to resistance temperature detectors in turbine applications. You will find it in gas turbine and steam turbine control cabinets. It accepts up to eight 3-wire RTD inputs for temperature monitoring. Therefore, this unit delivers accurate thermal measurement for critical machinery.
The GE IS220PRTDH1A Input Output Pack measures 180 mm in height and 100 mm in width. Its depth reaches 25 mm for panel mounting. The unit weighs approximately 0.35 kilograms. It contains one 16-bit ADC and eight constant current sources. One 50-pin ribbon header connects the pack to a termination board. Additionally, you get eight status LEDs for channel diagnostics.
Key Technical Specifications
| Parameter | Value |
|---|---|
| Manufacturer | GE Energy / General Electric |
| Model | IS220PRTDH1A |
| Product Type | Input Output Pack |
| Number of Channels | 8 (RTD inputs) |
| RTD Types | Pt100, Ni100, Cu10 (3-wire) |
| Temperature Range | -200°C to +850°C |
| ADC Resolution | 16 bits |
| Accuracy | ±0.2% of reading |
| Excitation Current | 1 mA per channel |
| Height | 180 mm |
| Width | 100 mm |
| Depth | 25 mm |
| Weight | 0.35 kg |
| ADC Count | 1 (16-bit) |
| Current Sources | 8 (constant current) |
| Interface Connector | 50-pin ribbon header |
| Status LEDs | 8 (yellow) |
| Energy Storage | ≈ 180 µF (capacitive) |
| Power Consumption | 200 mA @ 5 VDC |
| Operating Temperature | -30°C to +65°C |
Internal Architecture and Energy Storage
The GE IS220PRTDH1A Input Output Pack stores minimal energy in its power filter. Small capacitors hold approximately 180 microfarads total capacitance. Eight constant current sources provide 1 mA excitation to each RTD. A 16-bit ADC converts each channel’s voltage into temperature values. The pack uses a multiplexer to scan all eight channels sequentially. A microprocessor linearizes the RTD resistance-to-temperature relationship. The pack supports 3-wire RTD configuration for lead resistance cancellation. Eight yellow LEDs indicate active channels and correct operation. The pack communicates with the Mark VIe controller through the InSync bus.
Connection Interfaces and Wiring Details
You will find a 50-pin ribbon header on the bottom edge of the pack. Connect this header to a terminal board like the IS220PTURH1A. Use a shielded 50-conductor ribbon cable for the connection. The GE IS220PRTDH1A Input Output Pack connects to termination boards for field wiring. Each RTD requires three wires: excitation, sense A, and sense B. Connect the RTD positive lead to the EXC terminal. Connect the two negative leads to the SENSE and RETURN terminals. Use shielded twisted-pair cable for all RTD field connections. Eight yellow LEDs light up when their respective channel detects a valid RTD. A flashing LED indicates an open circuit or wiring error.
Installation and Configuration Steps
You mount this pack onto a flat metal panel with four screws. First, drill four 4 mm holes matching the mounting pattern. Then, secure the pack using M3 screws with standoffs. Connect the 50-pin ribbon cable to the termination board. The GE IS220PRTDH1A Input Output Pack requires 5 VDC from the Mark VIe backplane. Use the Toolbox software to configure each RTD channel. Select the correct RTD type (Pt100, Ni100, or Cu10) for each input. Set the temperature measurement units to Celsius or Fahrenheit. The pack automatically scans and converts all eight channels. Verify each channel with a precision RTD simulator before system startup.
Details
| Weight | 0.1 kg |
|---|---|
| Dimensions | 25 × 108 × 127 mm |
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