IS220PAICH1A, REV C - Thermocouple Analog I/O Terminal Board

SPECIFICATIONS:

Part Number: IS220PAICH1A, REV C
Manufacturer: General Electric
Series: Mark VIe
Product Type: Thermocouple Analog I/O Terminal Board
Operating System: QNX
Power Requirements: +5 V dc, 6 A
Number of input channels: 12
Number of outputs: 125 V dc
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 Day
Availability: In Stock
Country of Origin: United States
Manual: GEH-6721D

FUNCTIONAL DESCRIPTION:

IS220PAICH1A, REV C is a Thermocouple 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 PAIC I/O pack serves as the electrical interface between one or two I/O Ethernet networks and an analog input terminal board. It includes a processor board shared across all Mark VIe distributed I/O packs and an acquisition board dedicated to the analog input function. This pack supports up to 10 analog inputs. The first eight can be configured for 5V or 10V inputs, or 0-20 mA current loop inputs, while the last two are adjustable for either 1 mA or 0-20 mA current inputs. Load terminal resistors for current loop inputs are located on the terminal board, with voltage measured across these resistors by the PAIC. Additionally, the PAICH1 version supports two 0-20 mA current loop outputs, while the PAICH2 version includes extra hardware for 0-200 mA current output on the first channel. The pack’s input is through dual RJ45 Ethernet connectors and a three-pin power input, while output is via a DC-37 pin connector linked to the terminal board. Visual diagnostics are available through indicator LEDs, and local diagnostics can be accessed via an infrared port for serial communication.

COMPATIBILITY:

PAICH1A is compatible with the analog input terminal board (TBAIHIC), and the STAI board, but not the DIN rail-mounted DTAI board. Control mode refers to the number of I/O packs used in a signal path:

• Simplex uses one I/O pack with one or two network connections.
• Dual uses two I/O packs with one or two network connections.
• TMR uses three I/O packs with one network connection on each.

While the PAIC will mount on a TBAIH1A or TBAIH1B terminal board the pack will not realize full accuracy of the analog signals due to circuit differences between the terminal board revisions. For this reason, the PAIC is only compatible with the H1C 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:

• Plug one PAIC I/O pack for simplex or three PAIC I/O packs for TMR into the terminal board connectors.
• Secure the packs mechanically using the threaded studs near the Ethernet ports, which slide into a mounting bracket designed for the specific terminal board.
• Adjust the bracket location to prevent right-angle force on the DC37 connector between the pack and the terminal board. This adjustment typically needs to be done only once during the product's lifecycle.
• Connect one or two Ethernet cables, based on the system configuration. The pack will operate through either port. When using dual connections, it's standard to link ENET1 to the network connected to the R controller.
• Apply power to the pack by plugging in the connector on its side. There's no need to disconnect the power before inserting the connector, as the I/O pack includes a soft-start capability to manage current inrush during power application. 

OPERATION:

The processor application code contains all the logic necessary to allow the pack to operate from one or two Ethernet inputs. When operated from two Ethernet inputs, both network paths are active all the time. A failure of either network will not result in any disturbance to the I/O pack operation, and the failure will be indicated through the working network connection. This arrangement is more tolerant of faults than a classic hot-backup system where the second port is only used after a primary port failure is detected. The Ethernet ports on the processor auto-negotiate between 10 MB/s and 100 MB/s speed, and between half-duplex and full-duplex operation.

• 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

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 round 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:

How does the board handle cold junction compensation?

Cold junction compensation is essential for accurate thermocouple temperature measurement. The Thermocouple Analog I/O Terminal Board includes built-in cold junction compensation that automatically adjusts the readings to account for temperature variations at the connection point of the thermocouple (often referred to as the cold junction or reference junction).

What is the voltage input range of the Thermocouple Analog I/O Terminal Board?

The voltage input range typically depends on the type of thermocouple used. The board is designed to handle the low-level voltages that thermocouples generate, usually in the millivolt range. The board’s input circuitry is designed to amplify these small voltages for accurate digital conversion.

What are the output options of the Thermocouple Analog I/O Terminal Board?

The board typically provides analog output signals corresponding to the temperature readings of the thermocouples. These outputs are often in the form of a voltage signal (e.g., 0-10V or 4-20mA) that can be read by a control system, PLC, or other monitoring equipment. The board may also provide digital outputs depending on the system configuration.