IS220PDIAH1A, REV D - Discrete Contact Input Terminal Board

SPECIFICATIONS:

Part Number: IS220PDIAH1A, REV D
Manufacturer: General Electric
Product Type: Discrete Contact Input Terminal Board
Function: I/O Module
Series: Mark VIe
Number of channels: 24
Operating temperature: -40 to +70°C
Size: 15.9 cm high x 17.8 cm
Input isolation in pack: Optical isolation to 1500 V on all inputs
Input Filter: Hardware Filter, 4 ms
AC Voltage Rejection: 60 V rms at 50/60 Hz at 125 V dc excitation
Availability: In Stock
Weight: 0.8kg
Repair: 3-7 Day
Country of Origin: USA
Manual: GEH-6721D

FUNCTIONAL DESCRIPTION:

IS220PDIAH1A, REV D is a Discrete Contact Input Terminal Board manufactured and designed by General Electric as part of the Mark VIe Series used in GE Distributed Turbine Control Systems. The PDIA I/O pack interfaces one or two I/O Ethernet networks with a discrete input terminal board. It features a common processor board used across all Mark VIe distributed I/O packs and a dedicated acquisition board for discrete input functions. Supporting up to 24 contact inputs and terminal board-specific feedback signals, the PDIA is compatible with three voltage levels when paired with TBCIH1, H2, or H3 terminal boards. It also connects to an isolated discrete input board with voltage sensing using a TICI board. The pack includes dual RJ45 Ethernet ports for system input, a three-pin power input, and a DC-37-pin connector for discrete signal input, linking directly to the terminal board. Diagnostics are facilitated through indicator LEDs and an infrared port for local serial communication.

COMPATIBILITY:

The PDIAH1A is compatible with five types of discrete contact input terminal boards, including TBCI, TICI, and STCI boards, but excludes the DIN-rail mounted DTCI board. Control mode determines the number of I/O packs in a signal path:

• Simplex – Uses one I/O pack with one or two network connections.
• Dual – Utilizes two I/O packs with one or two network connections.
• TMR – Employs three I/O packs, each with a single network connection.

INSTALLATION:

• Insert one PDIA I/O pack for Simplex or three for TMR directly into the terminal board connectors.

• Secure the packs using the threaded studs near the Ethernet ports. These studs slide into a mounting bracket specific to the terminal board type. Adjust the bracket to prevent right-angle force on the DC37 connector. This adjustment is typically needed only once during the product's lifespan.

• Connect one or two Ethernet cables based on system configuration. The pack functions with either port, but if dual connections are used, ENET1 is typically linked to the R controller’s network.

• Power the pack by plugging in the side connector. The I/O pack features a soft-start capability, regulating current inrush, so power removal before insertion is unnecessary.

OPERATIONS:

The processor board connects to an acquisition board specific to the I/O pack function. Upon application of input power, the soft-start circuit ramps up the voltage available on the processor board. The local power supplies are sequenced, and the processor reset is removed. The processor completes self-test routines and then loads application code specific to the I/O pack type from flash memory. The application code reads board ID information to ensure the correct matching of the application code, acquisition board, and terminal board. With a good match, the processor attempts to establish Ethernet communications, starting with the request of a network address. The address request uses the industry standard dynamic host configuration protocol (DHCP) and the unique identification read from the terminal board. After Ethernet initialization, the processor programs the onboard logic runs the application, and enables the acquisition board to begin 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

CONNECTORS:

The PDIA pack features a DC-37 pin connector on its underside, linking directly to the discrete input terminal board. This connector carries 24 input signals, an ID signal, relay coil power, and a feedback multiplex command.

• ENET1, an RJ45 Ethernet port on the side, serves as the primary system interface.
• ENET2, a second RJ45 Ethernet port, functions as the redundant or secondary interface.
• A 3-pin connector on the side supplies 28 V DC power to both the pack and terminal board.

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FREQUENTLY ASKED QUESTIONS:

How does the PDIA I/O pack connect to the terminal board?

The PDIA I/O pack directly plugs into the terminal board using a DC-37 pin connector on its underside. This connector transmits 24 discrete input signals along with an ID signal, relay coil power, and a feedback multiplex command. A secure mechanical mounting ensures stable and reliable connectivity.

What are the Ethernet connectivity options for the PDIA I/O pack?

The PDIA I/O pack features two RJ45 Ethernet ports: ENET1 and ENET2. ENET1 functions as the primary system interface, while ENET2 serves as the redundant or secondary interface in dual-network configurations. The pack operates over either port, ensuring flexibility and redundancy in communication.

What power supply is required for the terminal board and PDIA I/O pack?

A 3-pin power connector on the PDIA I/O pack provides 28 V DC power to both the pack and the terminal board. This ensures stable operation and supports the necessary functions of the discrete input system. The I/O pack has an inherent soft-start capability, which controls current inrush when power is applied.