GE Mark VIe Series IS220PDIOH1A Discrete Input/Output Module

The IS220PDIOH1A 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 electrical link between one or two I/O Ethernet networks and the discrete input/output terminal block is provided by the Discrete Input/Output (PDIO) package. The kit includes a capture board dedicated to discrete input/output functions and a processor board shared by all Mark VIe distributed I/O packages. The pack can accept up to 24 contact inputs, manage up to 12 relay outputs, and obtain terminal board-specific feedback signals.

Functional Description

The voltage capability of the PDIO is determined by the connected terminal board. The three-pin power input and the two RJ45 Ethernet connectors are used as system inputs to the battery pack. the DC-62 connector connects directly to the corresponding terminal board connector for discrete signal inputs and outputs. the LEDs are used to display visual diagnostic information.

Functionally, the PDIO is equivalent to combining the PDIA and PDOA I/O packages into a single unit. It is mounted on the TDBS terminal block for simplex applications, which is a hybrid of the SRLY relay terminal block and the STCI contact input terminal block.

It is mounted on the TDBT terminal block used for TMR applications, and when used in conjunction with the WROB option, provides the ability to combine the terminal block with a TBCI contact input terminal block. The following diagram shows the connections established when three PDIO packages are installed on a TDBT terminal board.

Compatibility

The discrete contact input/output terminal boards TDBT for TMR PDIO applications and TDBS for individual PDIO applications are compatible with the PDIOH1A.

IS220PDIOH1A Installation

Securely mount the selected terminal block.

Connect the terminal board connectors directly to the PDIO I/O package.

Mechanically secure the pack using the threaded studs next to the Ethernet port. The studs slide into the mounting brackets made for the specific style of terminal board.

No right-angle force should be applied to the DC-62 pin connector between the battery pack and the terminal block by moving the position of the bracket. Only one adjustment is required during the life of the product.

Connect one or two Ethernet cables, depending on the machine setup. Either port will allow the battery pack to operate. When using a dual connection, it is customary to link ENET1 to the network connected to the R controller.

Connect the connector on the side of the battery pack to a power source to supply power to the battery pack. Since the I/O pack has an inherent soft-start feature that regulates current inrush in power applications, it is not necessary to turn off the power before plugging in the cables.

If necessary, use the ToolboxST* programme to set up the I/O pack.

IS220PDIOH1A Operation

Each Mark VIe Ethernet I/O package or module shares a processing board. It contains the following:

A fast CPU with flash memory and RAM.

Two 10/100 Ethernet ports, connected and completely independent.

Hardware reset circuitry and watchdog timer.

Internal temperature sensor.

Status LEDs.

Ability to electronically read IDs on other boards.

Input power connector with current limiter and soft start.

Local power supply with monitoring and sequencing.

I/O packages or modules functionally specific to the capture board connected to the processor board. When input power is applied, the soft-start circuitry ramps up the available voltage on the processor board. The processor reset is turned off and the local power supply is turned on sequentially. After completing the self-test procedure, the processor loads the application code from flash memory specific to the I/O package or module type. To verify that the application code, capture board, and terminal board are properly matched, the application code reads the board ID information.

When a good match is made, the processor initiates an Ethernet connection by requesting a network address. Dynamic Host Configuration Protocol (DHCP) (industry standard) and the unique identifier of the terminal board are used for the address request. After Ethernet is initiated, the CPU runs the application, programs the on-board logic, and allows the acquisition board to begin operation.