IS220PAICH1A, REV E - Analog I/O Terminal Board

SPECIFICATIONS:

Part Number: IS220PAICH1A, REV E
Manufacturer: General Electric
Series: Mark VIe
Product Type: Analog I/O Terminal Board
Operating System: QNX
Power Requirements: +5 V dc, 6 A
Number of input channels: 10
Number of outputs: 2
Trip Solenoid Rating: 125 V dc
Power supply voltage: 28 V dc
Voltage Range: 18 - 32 VDC
Mounting: DIN-rail mounting
Technology: Surface mount
Operating temperature: 40 to 70°C
Size: 33.0 cm high x 17.8 cm
Repair: 3-7 Days
Availability: In Stock
Country of Origin: United States
Manual: GEH-6721D

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 (PAIC) 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, allowing them to adjust dynamically between 10 Mbps and 100 Mbps speeds and switch 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.

WOC has the largest stock of OEM Replacement Parts for GE Distributed Turbine Control Systems. We can also repair your faulty boards and supply unused and rebuilt boards backed up with a warranty. Our team of experts is available around the clock to support your OEM needs. Our team of experts at WOC is happy to assist you with any of your automation requirements. For pricing and availability on parts and repairs, kindly contact our team by phone or email.

FREQUENTLY ASKED QUESTIONS:

Which terminal boards is the PAICH1A compatible with?

The PAICH1A is compatible with TBAIH1C and STAI analog input terminal boards. It is not compatible with the DIN rail-mounted DTAI board. Using it on earlier terminal board versions like TBAIH1A or TBAIH1B is not recommended due to potential signal accuracy issues.

How is the I/O pack mounted?

The I/O pack mounts directly onto the terminal board via a DC-37 pin connector. It is mechanically secured using threaded studs and a mounting bracket, ensuring a stable connection without stressing the connector.

What is the primary function of the I/O pack?

It provides the electrical interface between the Mark VIe control system’s I/O Ethernet networks and analog signal processing hardware. It handles analog signal acquisition and conditioning for up to 10 analog input channels and 2 analog output channels via integrated acquisition and processor boards (BPPX).