IS220PTCCH1B, REV D - Thermocouple Input Module

SPECIFICATIONS:

Part Number: IS220PTCCH1B, REV D
Manufacturer: General Electric
Series: Mark VIe
Function: Thermocouple Input Module
Number of Channels: 12
Thermocouple Types: E, J, K, S
Span: -8 mV to +45 mV
A/D Converter: 16-bit
Common Mode Voltage: +5 Volts
Normal Mode Rejection: 250mV
Microprocessor: AMD-K6 300 MHz
Operating temperature: -30 to 65� C
Size: 8.26 cm wide x 4.19 cm
Technology: Surface Mount
Repair: 3-7 Day
Availability: In Stock
Country of Origin: United States
Manual: GEH-6721_VOL_II

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FUNCTIONAL DESCRIPTION:

IS220PTCCH1B, REV D is a Thermocouple Input Module manufactured and designed by General Electric as part of the Mark VIe Series used in GE Distributed Control Systems. The PTCC functions as the electrical interface between one or two I/O Ethernet networks and a thermocouple input terminal board. It comprises a processor board, which is shared across all Mark VIe distributed I/O packs and an acquisition board dedicated to thermocouple input. The pack supports up to 12 thermocouple inputs, and with two packs, it can manage up to 24 inputs on the TBTCH1C. In a TMR configuration with the TBTCH1B terminal board, three packs are required, each with its cold junction, supporting a total of 12 thermocouples. The pack receives input through dual RJ45 Ethernet connectors and a three-pin power input. The output is provided through a DC-37 pin connector, which connects directly to the terminal board. Visual diagnostics are shown via LEDs, and local diagnostics can be accessed through an infrared port.

INSTALLATION:

• Mount the desired terminal board securely.
• Connect the PTCC I/O pack directly to the terminal board connectors.
• Secure the packs to the threaded studs located near the Ethernet ports. These studs fit into a mounting bracket tailored for the specific terminal board.
• Adjust the bracket position to eliminate right-angle stress on the DC37 connector between the pack and terminal board. This adjustment should be made once during the product�s lifetime.
• Depending on the system configuration, connect one or two Ethernet cables. The pack is compatible with either port, but if using twin connections, it�s standard to link ENET1 to the network associated with the R controller.
• Power the pack by connecting the appropriate connector. There�s no need to switch off the cable power before connection, as the I/O pack features a built-in soft-start mechanism that manages current inrush.
• Configure the I/O pack as needed using the ToolboxST application.

OPERATION:

• High-performance processor with integrated RAM and flash memory
• Two separate 10/100 Ethernet ports with connectors
• Watchdog timer and reset circuitry for hardware reliability
• Onboard local temperature sensor
• Infrared serial communication interface
• LEDs for status indication
• Electronic ID functionality with the ability to read IDs from other boards
• Extensive programmable logic supporting the acquisition board
• Power input connector featuring soft-start and current limiting
• Local power supplies with sequencing and monitoring capabilities

ANALOG INPUT HARDWARE:

The PTCC input board receives 12 millivolt-level signals from the thermocouples connected to the terminal board. The analog input system includes six differential multiplexers, a main multiplexer, and a 16-bit analog-to-digital converter that transmits the digital data to the processor board. Each input is equipped with hardware and firmware filters, and the converter samples at a rate of up to 120 Hz.

POWER MANAGEMENT:

The PTCC includes power management in the 28 V input circuit. The management function provides a soft start to control current inrush during power application. After applying power, the circuit provides a fast current limit function to prevent a pack or terminal board failure from propagating back onto the 28 V power system. The green PWR indicator will light when power is present and working properly. If the current limit function operates, the indicator will be out until the problem is cleared.

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FREQUENTLY ASKED QUESTIONS:

What is the power supply requirement for the module?

The module receives power through a three-pin input connector and includes a built-in soft-start feature to manage current inrush. It operates with a 28 V input circuit.

How do I connect the Ethernet cables to the module?

You can connect one or two Ethernet cables, depending on the system configuration. The pack works with either Ethernet port, but for twin connections, it is common practice to link ENET1 to the network associated with the R controller.

How is the module protected from power issues?

The module includes a power management system with a current limit function to prevent failures from affecting the 28 V power system. The green PWR indicator will light when power is stable, and if the current limit is triggered, the indicator will go out until the issue is resolved.