Configured for discrete contact input acquisition in Mark VIe Distributed Turbine Control Systems, the GE IS220PDIAH1A (IS220PDIA Discrete Contact Input Terminal Board) provides direct physical/electrical execution. The module conditions 24 discrete channels via 4 ms hardware filtering and optical isolation up to 1500 V, digitizing process states for transmission across dual RJ45 Ethernet networks.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | IS220PDIAH1A |
| Brand | General Electric |
| Origin | USA |
| Weight | 0.8 kg |
| Dimensions | 15.9 cm H x 17.8 cm W |
| Operating Temp | -40 to +70 deg C |
| Power Consumption | 28 VDC nominal (3-pin power connector) |
| Number of Channels | 24 discrete input channels |
| Optical Isolation | 1500 V on all inputs |
| Input Filter | Hardware filter, 4 ms |
| AC Voltage Rejection | 60 V rms at 50/60 Hz (at 125 VDC excitation) |
| Network Interface | Dual RJ45 Ethernet connectors |
| Configuration Modes | Simplex, Dual, TMR (Triple Modular Redundancy) |
| Local Diagnostics | Infrared port, LED indicator array |
Deterministic Network Integration and I/O Density Scaling
The IS220PDIAH1A integrates directly into Mark VIe control architectures using dual Ethernet connectors, providing high backplane bus communication velocity and low-latency packet transmission. High I/O density scaling allows 24 optically isolated field contacts to be processed simultaneously per module. Onboard firmware flash compatibility ensures synchronized scan execution across Simplex, Dual, and TMR network configurations when connected to TBCI, TICI, or STCI terminal boards.
Frequently Asked Questions
Q: What level of electrical isolation is provided between the field contact inputs and internal logic circuitry?
A: All 24 discrete input channels feature optical isolation rated up to 1500 V, isolating field signal transients from the internal processor board.
Q: Which terminal boards are physically compatible with the IS220PDIAH1A I/O pack?
A: The module is compatible with TBCI (types H1, H2, H3), TICI, and STCI discrete contact input terminal boards, but is not compatible with DTCI DIN-rail mounted terminal boards.
Q: How is diagnostic data accessed locally without breaking the main network connection?
A: Local diagnostic serial communications can be conducted wirelessly via the onboard infrared port located on the front of the I/O pack housing, supplemented by the LED indicator array.
Field Installation Guidelines
Mount the IS220PDIAH1A directly onto the matching terminal board DB60 connector and tighten the mechanical retaining fasteners. Connect the dual RJ45 Ethernet network cables to the primary and secondary IONet ports to maintain network redundancy. Wire power to the dedicated 3-pin connector ensuring proper voltage polarity. All field contact input wiring connected to the terminal board must use shielded twisted-pair cables, with shields terminated to cabinet frame earth ground at a single point to prevent ground loops. Maintain clear line of sight to front panel LEDs for routine visual diagnostics.
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