Configured for core analog signal acquisition and deterministic distribution in Mark VIe control platforms, the GE IS220PCLAH1A (IS220PCLA Core Analog I/O Module) provides direct physical/electrical execution. The module interfaces 4-20 mA current loops, thermocouples, RTDs, and voltage inputs across SCLS and SCLT terminal boards to process sensor feedback for aeroderivative gas turbine controls in simplex and Triple Modular Redundant (TMR) architectures.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | IS220PCLAH1A (IS220PCLA) |
| Brand | GE (General Electric) |
| Origin | USA |
| Operating Temp | -30 to 65 deg C (-22 to 149 deg F) |
| Power Consumption | 19.8 W maximum |
| Input Voltage | 28 VDC nominal |
| A/D Converter Resolution | 16-bit |
| Current Loop Specifications | 4-20 mA input and output (18 VDC compliance voltage) |
| Sensor Capacity | Up to 8 Thermocouple channels and up to 8 RTD channels |
| Internal Architecture | BCLA acquisition board with BPPB processor board |
| Network Interfaces | Dual RJ-45 Ethernet connectors (100Base-TX) |
| Frame Rates | 10, 20, 40, 80, 160, and 320 ms |
| Status Indicators | 4 onboard Status LEDs |
| Redundancy Support | Simplex, Dual, and Triple Modular Redundant (TMR) |
Deterministic Backplane Bus Velocity and I/O Density Scaling
The IS220PCLAH1A interfaces with Mark VIe Ethernet control networks to maintain synchronized backplane bus communication velocity across configurable system frame rates from 10 ms to 320 ms. Utilizing 16-bit A/D converters on the internal BCLA acquisition board, the unit executes high-accuracy digitization of analog field signals. Onboard firmware flash compatibility ensures synchronized parameter mapping and seamless dynamic voting state execution when deployed in TMR configurations using fanned SCLT terminal board networks.
Frequently Asked Questions
Q: How does the IS220PCLAH1A manage signal distribution in a TMR configuration?
A: In a TMR layout, a single SCLT terminal board hardware-fans incoming analog signal inputs across three connected IS220PCLA I/O packs, allowing independent processing and voting across three control channels.
Q: What processor board is integrated into the IS220PCLAH1A variant?
A: The IS220PCLAH1A revision contains an integrated BPPB processor board. (The functionally compatible PCLAH1B revision utilizes a BPPC processor board supported by ControlST software V04.03 or higher).
Q: What are the terminal board connection specifications for field I/O integration?
A: Field signals connect through Euro-style box-type terminal blocks on the SCLS (72 blocks) and SCLT (48 blocks) terminal boards, which interface to the module via 96-pin J3 and 48-pin J4 connectors.
Field Installation Guidelines
- Disconnect all primary 28 VDC power feeds to the P1 power connector prior to installing or removing the IS220PCLAH1A module.
- Wear an ESD grounding wrist strap attached to an unpainted surface of the enclosure frame during handling.
- Align the module housing with the mating terminal board mounting studs and seat the unit firmly onto the connector base.
- Tighten all mechanical retention screws to 0.8 Nm (7 in-lbs) to ensure solid earth grounding continuity and structural stability.
- Connect dual shielded RJ-45 Ethernet cables to ports ENET1 and ENET2, ensuring shield drain wires are terminated at the cabinet grounding bar.
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