IS220PAICH1B, REV C - Analog I/O Module

SPECIFICATIONS:

Part No: IS220PAICH1B, REV C
Manufacturer: General Electric
Function: Power Supply Board
Series: Mark VIe
Input voltage: 125 V
Input Span: 1 - 5 Vdc
Input Converter Resolution: 16-bit A/D Converter
Common Mode Voltage Range: 5 V
Scan Time: 5 ms
Total Output: 400 W
Total Output Power: 400 W
Output Voltages: +5, ±12, ±15, ±28 V DC
Temperature: 30 to 66°C
Technology: Surface Mount
Board Size: 8.26 cm High x 4.19 cm Wide x 12.1 cm Deep
Availability: In Stock
Country of Origin: USA
Manual: GEH-6721_Vol

FUNCTIONAL DESCRIPTION:

IS220PAICH1B, REV C is an Analog I/O Module manufactured and designed by General Electric as part of the Mark VIe Series used in GE distributed turbine control systems. The Analog I/O Pack (PAIC) serves as the electrical interface between one or two I/O Ethernet networks and an analog input terminal board. It incorporates a BPPx processor board along with an acquisition board tailored for analog input functionality. The PAIC supports up to 10 analog inputs. The first eight channels are configurable for ±5 V, ±10 V, or 4–20 mA current loop inputs, while the final two channels can be set for ±1 mA or 4–20 mA current inputs.

Current loop input signals are measured via load terminal resistors located on the terminal board, with the voltage across these resistors monitored by the PAIC. The PAIC1H model also supports two 0–20 mA current loop outputs. Additionally, the PAIC2H variant includes enhanced hardware to accommodate up to 0–200 mA current on the first output channel. The I/O pack interfaces via dual RJ-45 Ethernet connectors for network communication and a three-pin connector for power input. Output is delivered through a DC-37 pin connector that mates directly with the corresponding terminal board connector. LED indicators provide visual diagnostics to facilitate system monitoring and troubleshooting.

COMPATIBILITY:

• The PAIC I/O pack is designed to operate with one of several compatible BPPx processor boards, each offering specific capabilities and enhancements to support various analog input/output requirements within a control system architecture.

• The PAICH1A and PAICH2A models, along with their corresponding H2A variants, are equipped with the BPPB processor board. This board provides standard analog input processing capabilities suitable for a wide range of industrial applications.

• The PAICH1B and H2B variants, on the other hand, are fitted with the BPPC processor board, which is functionally compatible with the BPPB but introduces enhanced performance and processing capabilities. The BPPC board is fully supported by the ControlST software suite, beginning with version V04.03 and later, ensuring seamless integration with modern control system environments.

• The PAIC is compatible with the analog input terminal board (TBAIHIC), and the STAI board but not the DIN rail-mounted DTAI board. The PAIC is only compatible with the HIC version of TBAI and will report compatibility problems with any of the earlier revisions. No physical damage will result if a PAIC is powered up on an older board in error.

INSTALLATION:

• Secure Mounting of the Terminal Board: Begin by securely mounting the appropriate analog input terminal board in its designated location. Ensure the board is installed on a stable, vibration-resistant surface and properly aligned with system layout requirements. Verify that all mounting hardware is tightened and that the terminal board is electrically grounded according to system specifications.

• Connect the PAIC I/O Pack to the Terminal Board: Carefully align the PAIC I/O pack with the mating connectors on the terminal board and insert it directly into the terminal board connectors. These connectors are designed for precise alignment to prevent damage to the pins and ensure a secure and reliable electrical interface between the two components.

• Mechanically Secure the I/O Pack: Once the PAIC is connected, mechanically secure it using the threaded studs located adjacent to the dual Ethernet ports. These studs are designed to slide into a dedicated mounting bracket that corresponds to the specific terminal board model. This mechanical fastening minimizes vibration and mechanical stress on the electrical connections during operation.

• Adjust the Mounting Bracket to Prevent Connector Strain: Ensure the mounting bracket is adjusted so that the DC-37 pin connector between the I/O pack and the terminal board experiences no angular or lateral stress. This step is critical to maintaining long-term electrical integrity and preventing wear or damage to the connector. Typically, this adjustment is required only once during the initial installation and remains valid for the product’s entire service life.

• Apply Power to the I/O Pack: Finally, power the I/O pack by connecting the three-pin power connector located on the side of the device. The PAIC I/O pack includes an integrated soft-start feature, which controls the inrush current during power application. Therefore, it is not necessary to disconnect power from the cable before making the connection, simplifying the installation process and reducing downtime during maintenance.

OPERATION:

• High-Speed Processor with Integrated RAM and Flash Memory: At the core of the PAIC is a high-performance processor optimized for real-time data processing and control tasks. It is equipped with onboard RAM for fast access to volatile data and flash memory for secure storage of firmware, configuration files, and diagnostic logs. This architecture ensures the reliable execution of control logic and supports future firmware upgrades.

• Dual Independent 10/100 Ethernet Ports: The device features two fully independent 10/100 Mbps Ethernet interfaces, each with its physical connector. This dual-port configuration supports redundant network topologies, enhancing communication reliability and system availability. The independence of each port allows the I/O pack to maintain connectivity even in the event of a single network path failure.

• Integrated Hardware Watchdog Timer and Reset Circuit: To enhance system dependability, the PAIC includes a dedicated hardware watchdog timer that monitors processor activity and triggers a reset in case of software hang-ups or malfunction. An onboard reset circuit provides controlled system reinitialization, protecting against erratic behavior due to power anomalies or software faults.

• Local Ambient Temperature Sensor: The inclusion of a built-in temperature sensor allows continuous monitoring of the local operating environment. This information can be used for system diagnostics, thermal management, and ensuring the I/O pack operates within safe temperature thresholds.

• Infrared Serial Communications Port: An infrared (IR) serial port provides a convenient, non-intrusive interface for maintenance and diagnostics. It enables service personnel to communicate with the I/O pack without physical contact, reducing the risk of damage or contamination in harsh environments.

• Input Power Connector with Soft-Start and Current Limiting: Power is supplied through a dedicated connector featuring an integrated soft-start mechanism that gradually ramps up voltage during startup, reducing inrush current and preventing electrical stress on system components. A current limiter provides additional protection against overload and short-circuit conditions.

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FREQUENTLY ASKED QUESTIONS:

What is the function of the Analog I/O Module?

The Analog I/O Module serves as an electrical interface between I/O Ethernet networks and an analog input terminal board in GE distributed turbine control systems. It supports multiple analog inputs and provides enhanced features for analog signal processing.

What types of inputs does the Analog I/O Module support?

The module supports a variety of analog inputs. It is configurable for ±5 V, ±10 V, or 4–20 mA current loop inputs. The module can also support additional input options such as ±1 mA or 4–20 mA current inputs.

How does the Analog I/O Module achieve communication within the control system?

The module uses dual RJ-45 Ethernet connectors, supporting both primary and redundant network configurations. The Ethernet ports operate independently to maintain system reliability and communication even if one network path fails. The module interfaces with compatible processor boards and terminal boards through Ethernet for high-speed data transfer.