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IS220PDIOH1A, REV H - Discrete Contact Input/Output Terminal Board is available in stock which ships the same day.
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SPECIFICATIONS:
Part Number: IS220PDIOH1A, REV H
Manufacturer: General Electric
Series: Mark VIe
Product Type: Discrete Contact Input/Output Terminal Board
Number of input channels: 24
Input Filter: Hardware filter, 4 ms
Input Signal Logic: Active High / Active Low
Input isolation in pack: 1500 V
Input Voltage Range: 5V DC / 24V DC
AC voltage rejection: 60 V RMS
Isolation: Optical or Galvanic Isolation
Output Voltage Range: 5V DC – 250V AC
Contact Rating (Relay Output): 5A
Response Time: <5ms
Number of relay command channels: 12
Number of input channels: 24 DI and 12 from C
Operating Temperature: -40°C to +70°C
Mounting Type: DIN Rail
Size: 15.875 cm high x 10.795 cm wide
Country of Origin: United States
Availability: In Stock
Manual: GEH-6721G
FUNCTIONAL DESCRIPTION:
IS220PDIOH1A, REV H is a Discrete Input/Output Module manufactured and designed by General Electric as Part of the Mark VIe Series used in Distributed Control Systems. The Discrete Input/Output (PDIO) pack is the electrical interface between I/O Ethernet networks and a discrete input/output terminal board. It combines a common processor board, used across all Mark VIe distributed I/O packs, with a specialized acquisition board for discrete I/O functions. The PDIO pack can handle up to 24 contact inputs, 12 relay outputs, and feedback signals specific to the terminal board.
The terminal board determines the PDIO's voltage capabilities. System input is provided through dual RJ45 Ethernet connectors and a three-pin power input, while discrete signal I/O is managed via a DC-62 connector to the terminal board. Visual diagnostics are available through indicator LEDs, and an infrared port supports local serial communication.
The PDIO pack consolidates the features of the PDIA and PDOA I/O packs into a single unit. For simplex applications, it connects to a TDBS terminal board, combining the functions of an SRLY relay terminal board and an STCI contact input terminal board. In TMR applications, it links to a TDBT terminal board, which, with the WROB option, provides the functionality of a TRLYH1B relay terminal board and a TBCI contact input terminal board.
INSTALLATION:
For simplex applications, a single PDIO I/O pack connects directly to the terminal board. In TMR applications, three PDIO I/O packs are used. The packs are securely mounted with threaded studs near the Ethernet ports, which fit into a mounting bracket designed for the terminal board type. This bracket should be adjusted during installation to avoid any right-angle stress on the DC-62 pin connector. Depending on the system setup, one or two Ethernet cables can be used, with ENET1 typically connected to the network of the R controller. Power is supplied by plugging in the side connector, and the pack’s soft-start feature regulates the current inrush, eliminating the need to disconnect power before installation.
OPERATION:
The processor board interfaces with an acquisition board designed for the specific I/O pack function. Upon power-up, the soft-start circuit gradually increases the voltage to the processor, initiating a sequenced startup of local power supplies and clearing the processor reset. The processor then performs self-tests, loads application code from flash memory, and verifies compatibility with the acquisition and terminal boards through board ID checks. If the components are compatible, the processor establishes Ethernet communication by requesting a network address via DHCP, using the terminal board’s unique ID. Once Ethernet is operational, the processor configures onboard logic, runs the application, and activates the acquisition board.
The application code allows the I/O pack to operate with one or two active Ethernet inputs simultaneously. If one network fails, the I/O pack continues operating without disruption, and the failure is reported through the active connection. This method offers improved fault tolerance compared to a hot-backup system, where a secondary connection is activated only after detecting a primary failure. The Ethernet ports support auto-negotiation between 10 MB/s and 100 MB/s speeds, along with half-duplex and full-duplex modes. The processor board, shared across all Mark VIe Ethernet I/O packs, includes the following features:
RELAY COMMAND SIGNALS:
The PDIO relay command signals initiate signal conditioning and level shifting, connecting terminal board outputs to the control logic. Each output features an open-collector transistor circuit with a current monitor to detect activation and load connection. Status LEDs and monitor outputs provide engagement feedback. If an output is triggered but the expected load is absent, the status LED stays off, and the monitor line remains false. The LEDs are located at the top left of the PDIO pack.
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.
What is the role of the Discrete Contact Input/Output Terminal Board?
The Discrete Contact Input/Output Terminal Board functions as an interface for managing discrete input and output signals in a control system. It allows connection to external devices such as relays, switches, and sensors, enabling the system to process input signals and send output commands.
How does the PDIO I/O pack interact with the terminal board?
The PDIO I/O pack interfaces with the Discrete Contact Input/Output Terminal Board by handling discrete signal processing. It uses a processor board and acquisition board combination to manage communication and ensure proper operation, including verifying board IDs and establishing network connectivity.
What are the voltage capabilities of the Discrete Contact Input/Output Terminal Board?
The voltage capability of the terminal board is determined by its specific design. It is essential to select the correct terminal board to match the required voltage levels for your system. The PDIO I/O pack supports various voltage capabilities based on the terminal board used.
