IS220PAICH1A, REV E - Analog I/O Terminal Board

SPECIFICATIONS:

Part Number: IS220PAICH1A, REV E
Revision: REV E
Manufacturer: General Electric
Series: Mark VIe Speedtronic
Functional Designation: Analog Input/Output Basic Pack (PAIC)
Number of Inputs: 10 Analog Input Channels (Channels 1–8: 5$ V, 10$ V, or 4–20 mA; Channels 9–10: 1 mA or 4–20 mA)
Number of Outputs: 2 Current Loop Output Channels (0–20 mA)
A/D Converter Resolution: 16-bit High-Resolution Acquisition
Processor Architecture: High-speed processor equipped with RAM and Flash memory
Power Requirements: Nominal 28.0 VDC (Range: 18.0 to 32.0 VDC)
Operating System: QNX Real-Time OS
Interface Topology: Dual RJ45 Ethernet Ports (IONet) & 1x DC-37 Pin Connector
Operating Temperature: -30 to 65 Degrees Celsius
Availability: In Stock
Country of Origin: United States
Manual: GEH-6721_Vol_II V

FUNCTIONAL DESCRIPTION:

IS220PAICH1A, REV E is an Analog I/O Terminal Board manufactured and designed by General Electric as part of the Mark VIe Series used in GE Distributed Gas Turbine Control Systems. The Analog I/O Pack (PAICH1A, REV E) serves as the interface between one or two I/O Ethernet networks and an analog input terminal board. It integrates a BPPX processor board with a dedicated analog acquisition board, tailored for analog input functions. This I/O pack supports up to 10 analog input channels:

• Channels 1–8 are configurable as +5 V, ±10 V voltage inputs, or 4–20 mA current loop inputs.
• Channels 9–10 can be set as either ±1 mA or 4–20 mA current inputs.

Load terminal resistors for current loops are mounted directly on the terminal board, with the voltage across these resistors monitored by the PAIC module. Additionally, the PAIC includes two current output channels (0–20 mA). The enhanced PAICH2 version provides additional hardware for supporting up to 200 mA on the first output channel. Connectivity features:
Dual RJ-45 Ethernet ports for network input.

• Three-pin power input connector.
• DC-37 pin connector for output, directly interfacing with the corresponding terminal board.

COMPATIBILITY:

The PAICH1A is compatible with the TBAIH1C analog input terminal board and the STAI board, but does not support the DIN rail-mounted DTAI board. Control mode defines the number of I/O packs in a signal path:

• Simplex Mode: Utilizes a single I/O pack with one or two Ethernet network connections.
• Dual Mode: Uses two I/O packs, each connected to one or two networks.
• TMR (Triple Modular Redundancy) Mode: Employs three I/O packs, each connected to a separate network for high-reliability applications.

While the PAIC can physically connect to older terminal board revisions such as TBAIH1A and TBAIH1B, it will not deliver optimal analog signal accuracy due to differences in circuit design. The module is specifically engineered for compatibility with the TBAIH1C board (H1C revision), and it will alert users to incompatibility if connected to earlier versions.

OPERATION:

The processor application code in the I/O pack includes all required logic to operate with either one or two Ethernet inputs. When configured with dual Ethernet connections, both network paths remain active simultaneously, providing continuous communication. In the event of a network failure, the I/O pack maintains normal operation using the remaining active connection, and the failure is reported through the functioning network.

This dual-network setup provides enhanced fault tolerance, outperforming traditional hot-backup configurations, where the secondary connection is only activated after a primary failure is detected.

The Ethernet ports on the processor support auto-negotiation, dynamically adjusting between 10 Mbps and 100 Mbps and switching between half-duplex and full-duplex modes for optimal network performance.

• High-speed processor with RAM and flash memory
• Two fully independent 10/100 Ethernet ports with connectors
• Hardware watchdog timer and reset circuit
• Local ambient temperature sensor
• Infrared serial communications port
• Status-indication LEDs
• Electronic ID and the ability to read IDs on other boards
• Substantial programmable logic supporting the acquisition board
• Input power connector with soft start/current limiter
• Local power supplies, including sequencing and monitoring

INSTALLATION:

• Begin by plugging the PAIC I/O pack directly into the DC-37 connector on the terminal board. Ensure the connection is firm and properly aligned.
• Secure the I/O pack mechanically using the threaded studs located next to the Ethernet ports. These studs slide into a mounting bracket that is specific to the terminal board model.
• Adjust the bracket so that there is no lateral or right-angle force applied to the DC-37 connector between the I/O pack and the terminal board. This adjustment ensures long-term mechanical integrity and typically only needs to be done once during the product’s service life.
• The I/O pack is designed to mount directly onto the terminal board. In simplex configurations, the board will have a single DC-37 connector. TMR-capable boards include three DC-37 connectors, but they can also operate in simplex mode with just one I/O pack installed. The I/O pack is fully compatible with all these connection types.
• Depending on your system configuration, connect one or two Ethernet cables to the I/O pack. The module will function over either port. For dual-network setups, the recommended practice is to connect the ENET1 port to the network associated with the R controller.
• Power is supplied to the I/O pack by plugging in the connector on its side. There's no need to disconnect power from the cable before connection, as the I/O pack includes a soft-start feature that safely manages current inrush during power-up.
• Finally, use the ToolboxST application to configure the I/O pack as needed for your system. This step ensures that the pack is correctly recognized and functions according to your specific requirements.

WHY BUY FROM WOC:

World of Controls is a specialized global authority in the lifecycle extension of GE Mark VIe ecosystems, providing the IS220PAICH1A, REV E, in both UNUSED and REBUILT conditions to eliminate operational latency. Our quality-assurance protocol involves comprehensive parametric verification, 16-bit A/D conversion calibration, dual IONet transmission testing, and thermal stress cycles. By partnering with WOC, you secure hardware for peak deterministic performance, reinforced by 24/7 technical consultation and accelerated global logistics.

FREQUENTLY ASKED QUESTIONS:

What is GE IS220PAICH1A, REV E?

The IS220PAICH1A, REV E is an Analog Input/Output Basic Pack (PAIC) belonging to General Electric's Mark VIe Speedtronic system. It serves as a localized, high-speed microprocessor-driven node that interfaces with up to 10 analog field inputs and drives 2 analog outputs, converting analog sensor voltages and current loops into digital data streams for the primary controllers.

Which terminal boards are compatible with the PAICH1A module?

The pack is designed for direct mating with the TBAIH1C analog input terminal board and the STAI simplex board. It does not support the DIN-rail-mounted DTAI board.

How does the module react if one of its Ethernet ports fails?

Because the module uses dual-redundant IONet architecture, both ports are continuously active. A failure on one network link will not interrupt data transmission, as the alternative port handles the control traffic seamlessly.

What is the processing rate for the internal Compressor Stall Detection algorithm?

The gas turbine compressor stall detection routine runs in the internal firmware at a high-speed execution rate of 200 Hz (every 5 ms). It monitors the first four analog inputs to calculate the dynamic rate of change of discharge pressure.

How does the PAICH1A handle different signal types across its 10 analog input channels?

Channels 1 through 8 are software-configurable to accept VDC, 10$ VDC, or 4–20 mA current loops. Channels 9 and 10 are optimized exclusively for low-current or standard current inputs, supporting either 1 mA or 4–20 mA configurations.

Where is the physical analog-to-digital conversion executed?

The physical conversion is performed directly within the PAIC pack using a high-resolution 16-bit Analog-to-Digital (A/D) converter. However, the conversion of raw 4–20 mA field currents into measurable voltage profiles occurs via precise burden/load resistors located on the mating terminal board.