Product Introduction

GE Energy IS220PRTDH1A | 363A4940CSP6 | Resistance Temperature Device (RTD). The IS220PRTDH1A is a resistance temperature device input module from General Electric. The module is part of GE's Mark VIe Speedtronic system, one of the last Speedtronic systems available. The Speedtronic series was created by GE in the 1960s to manage industrial gas and steam turbines and included popular versions such as the Mark I, Mark II, Mark IV, and Mark VI.

Only resistive simple devices such as RTDs should be connected to the RTD inputs on the IS220PRTD1A. Cables used for these connections should have proper insulation as specified in local electrical codes.

The IS220PRTDH1A is a resistance temperature device (RTD) input module manufactured by GE. The product specifications are as follows:

Part/Model: IS220PRTDH1A

Series: Mark VIe

Product Type: RTD Input Module

Instruction Manual Number: GEH-6721L

Number of Channels: 8-Channel Input Module

Country of Origin: United States (USA)

GE 336A4940CSP6 | IS220PRTDH1A | Resistance Temperature Device (RTD) Input Module. The GE 336A4940CSP6 is another name for the IS220PRTDH1A, which stands for Resistance Temperature Device (RTD) Input Module. This module is part of GE's Mark VIe Speedtronic system, one of the last Speedtronic systems available. The Speedtronic series was created by GE in the 1960s to manage industrial gas and steam turbines and included popular versions such as the Mark I, Mark II, Mark IV, and Mark VI.

The IS220PRTDH1A is an I/O pack designed for use with a terminal block. It is approved for use in hazardous locations when used with specific terminal blocks such as the IS200TRTDH2D, IS200SRTDH1A, or IS200SRTDH2A. The unit has its own power supply.

The IS220PRTDH1A is a resistance temperature device input module manufactured and designed by General Electric and is part of the Mark VIe series used in distributed control systems. The resistance temperature device (RTD) input (PRTD) pack electrically connects the RTD input terminal block and one or more I/O Ethernet networks. The pack contains an acquisition board dedicated to the thermocouple input function, and a processor board shared by all Mark VIe distributed I/O packs. The I/O pack supports up to eight RTD inputs, while the TRTD terminal block supports up to sixteen RTD inputs. The inputs use a DC-37 pin connector that connects directly to the pack's terminal block connector, as well as a three-pin power input. The outputs have two RJ45 Ethernet connectors. Indicator LEDs are used to display visual diagnostics.

IS220PRTDH1A Compatibility
RTD Input Terminal Boards The TRTDH1D, H2D, and SRTD boards are compatible with the PRTDH1A, but the DIN rail mounted DRTD board is not. The following table provides compatibility information.

One I/O package and one or two network connections are used in simplex mode.
Dual uses two I/O packages with one or two network connections.
TMR uses three I/O packages, each with one network connection.
The TRD input circuits are electrically isolated by the PRTD. This requires modifications to the terminal board transient protection for the TRTDH1D and TRTDH2D boards. The H1D version of the board provides filtering compatible with the PRTD standard scan rate. The H2D version of the terminal board provides less filtering to achieve adequate performance when the PRTD's fast scan rate is selected. While no physical damage will occur, an incompatibility will be detected if a PRTD is installed on an older version of the TRTD board.

IS220PRTDH1A Installation
Securely mount the desired terminal strip.
Connect one or two PRTDs directly to the connections on the terminal strip (for simplex control of eight or 16 RTDs).
Mechanically secure the battery pack using the threaded insert next to the Ethernet port. The insert connects to the mounting bracket specific to the terminal strip type. It is important to position the bracket where the DC-37 pin connector between the terminal strip and the battery pack will not be subjected to right angle forces. Only one adjustment is required during the life of the product.
Depending on the system configuration, connect one or two wires to ensure optimal operation on either port. When dual connections are used, ENET1 is typically linked to the network connected to the R controller.
Connect the connector on the side of the assembly to power the battery. The I/O assembly includes a built-in soft-start feature to limit inrush current at power-up, so there is no need to remove the cables before connecting.
To customize the I/O package to your needs, use the ToolboxST* application.
Processor Board Operation
The acquisition board dedicated to the I/O package or module function is connected to the processor board. When input power is applied, a soft start circuit increases the available voltage on the processor board. The processor resets off and the local power supplies are turned on in sequence. After completing a self-test routine, the processor loads the application code from flash memory specific to the I/O package or module type. To verify that the application code, acquisition board, and terminal board are properly matched, the application code reads the board ID information. When a good match is found, the processor attempts to start an Ethernet connection by requesting a network address.

The address request uses both the industry standard Dynamic Host Configuration Protocol (DHCP) and the unique identifier of the terminal board. After Ethernet is started, the CPU runs the application program, programs the on-board logic, and allows the acquisition board to begin operation.

The entire circuitry required to enable the I/O package to operate over one or two Ethernet inputs is contained in the processor application code. When two Ethernet inputs are used, both network paths are always active. I/O package or module operation is not impeded by the failure of either network, and a properly functioning network connection will indicate a failure. This configuration provides greater fault tolerance than a traditional hot-standby system where the second port is used only if the primary port fails. The processor's Ethernet port automatically negotiates between half-duplex and full-duplex operation at speeds between 10 MB/s and 100 MB/s.

The processor board is common to all Mark VIe Ethernet I/O packages or modules. It contains the following:

A fast processor with RAM and flash memory comes first.

Two fully independent 10/100 Ethernet port headers
Hardware reset and watchdog timer circuits
Internal temperature sensor
LEDs to indicate status
Ability to read IDs and electronic identification on other boards
Input power connector with current limiter and soft start
Local power supply, also includes monitoring and sequencing
IS220PRTDH1A Diagnostics
Power-on self-test checks the hardware on the CPU board, Ethernet ports, RAM, and flash memory.
Continuously checks that the internal power supplies are functioning properly
Verifies that the hardware setup matches by comparing the electronic ID data from the CPU, acquisition board, and terminal board, and then checks that the application code loaded from flash memory fits the hardware setup.
The hardware limit checks for each RTD type are based on predetermined (non-configurable) high and low levels that are near the edge of the operating range. Once this limit is reached, the input is no longer checked, but the logic signal is set.
If the hardware limit of any of the eight inputs is reached, a composite diagnostic alarm L3DIAG PRTD for the entire board is generated. Information about each diagnostic is available in the toolbox. Individual diagnostic signals can be latched and reset with the RESET DIA signal.
System limit testing is performed on each RTD input using customizable high and low levels. These limits are adjustable to enable/disable and latching/non-latching and can be used to trigger alarms. Signals that exceed the limits are reset with RESET SYS.
Detailed information for each diagnostic is available in the toolbox. Diagnostic signals can be individually latched and, if normal, reset with the RESET DIA signal.

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