IS220PRTDH1A, REV D - Resistance Temperature Device Input Module

SPECIFICATIONS:

Part Number: IS220PRTDH1A, REV D
Manufacturer: General Electric
Series: Mark VIe
Product Type: Input Module
Number of Channels: 8
A/D Converter Resolution: 14-bit
Common Mode Voltage Range: ±5 Volts
Maximum Lead Resistance: 15 Ω maximum
Availability: In Stock
Country/Region of Manufacture: United States
Manual: GEH-6721L

FUNCTIONAL DESCRIPTION:

IS220PRTDH1A, REV D is a Resistance Temperature Device Input Module manufactured and designed by General Electric as part of the Mark VIe Series used in distributed control systems. The Resistance Temperature Device (RTD) Input (PRTD) pack electrically connects an RTD input terminal board with one or more I/O Ethernet networks. This pack includes a dedicated thermocouple acquisition board along with a processor board shared across all Mark VIe distributed I/O packs. It supports up to eight RTD inputs, while the TRTD terminal boards can handle up to sixteen RTD inputs. A DC-37 pin connector, which connects directly to the terminal board, and a three-pin power input provide input connectivity. For output, the pack is equipped with two RJ45 Ethernet connectors and visual diagnostics are provided through indicator LEDs.

COMPATIBILITY:

The RTD input terminal boards TRTDH1D, H2D, and the SRTD board are compatible with PRTDH1A, while the DIN-rail mounted DRTD board is not. Compatibility details are outlined in the table below.

• One I/O pack and one or two network connections are used in Simplex.
• Two I/O packs with one or two network connections are used by Dual.
• Three I/O packs with one network connection each are used by TMR.
• The PRTD galvanically isolates the TRD input circuit, requiring adjustments to the transient protection on the TRTDH1D and TRTDH2D boards. The H1D version includes filtering compatible with PRTD's standard scan rate, while the H2D version provides reduced filtering to support PRTD’s rapid scan rate for optimal performance. Although no physical damage will occur if PRTD is installed on an older TRTD board version, an incompatibility alert will be triggered.

INSTALLATION:

• Directly connect one or two PRTDs to the connections on the terminal board (for simplex control of eight or 16 RTDs).

• Utilizing the threaded inserts next to the Ethernet ports, mechanically secure the packs. The inserts attach to the terminal board type-specific mounting bracket. It is important to position the bracket such that the DC-37 pin connector between the terminal board and the pack is not subjected to a right-angle force. Only one adjustment should be necessary during the lifespan of the product.

• Depending on the system configuration, connect one or two wires to ensure optimal operation across either port. It is customary to link ENET1 to the network connected to the R controller when dual connections are employed.

• Connect the connector on the side of the pack to provide electricity to the battery. The I/O pack includes a built-in soft-start feature that limits current inrush when power is applied, so it is not essential to unplug the cable before connecting it.

PROCESSOR BOARD OPERATION:

The acquisition board, which is specific to the function of the I/O pack or module, connects to the processor board. Upon applying input power, a soft-start circuit gradually increases the voltage available to the processor board. The processor reset is then deactivated, and the local power supply is sequentially activated. After completing self-tests, the processor loads application-specific code from flash memory for the particular I/O pack or module type. To confirm compatibility, the application code checks the board ID information for the acquisition and terminal boards. When a match is confirmed, the processor initiates Ethernet connections by requesting a network address.

The dynamic host configuration protocol (DHCP), which is the industry standard, and the terminal board's unique identifier are both used in the address request. Following Ethernet startup, the CPU runs the application, programs the on-board logic, and permits the acquisition board to start working.

DIAGNOSTICS:

• A power-up self-test that examines the hardware on the CPU board, Ethernet ports, RAM, and Flash memory.

• Constantly checking if the internal power supply is operating properly

• Verifying that the hardware set matches by comparing the electronic ID data from the CPU, acquisition, and terminal boards, then checking that the application code loaded from flash memory is appropriate for the hardware set.

• Hardware limit checking for each RTD type is based on predetermined (non-configurable) high and low levels that are placed close to the working range's edges. The input is no longer examined once this limit is reached, and a logic signal is set instead.

• A composite diagnostic alarm, L3DIAG PRTD, referring to the entire board is generated if the hardware limits for any one of the eight inputs are reached. Information about each diagnosis is available from the toolbox. Individual diagnostic signals may be latched, and the RESET DIA signal may be used to reset them.

• System limit testing for each RTD input is done using customizable high and low levels. These restrictions, which can be adjusted for enable/disablement and latching/non-latching, can be utilized to trigger alarms. The out-of-limit signals are reset via RESET SYS.

• The toolbox offers information on each diagnosis in detail. The diagnostic signals can be individually latched and, if they become healthy, reset with the RESET DIA signal.

WOC has the largest stock of OEM replacement parts for GE Distributed 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 round 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.

FREQUENTLY ASKED QUESTIONS:

How many RTD inputs can the RTD Input Module support?

The RTD Input Module typically supports up to eight RTD inputs directly, while compatible terminal boards like the TRTD boards can support up to sixteen inputs.

Which terminal boards are compatible with the PRTD Module?

The TRTDH1D, TRTDH2D, and SRTD terminal boards are compatible with the PRTDH1A module. However, the DIN-rail-mounted DRTD board is not compatible.

What kind of isolation is used in the RTD Input Module?

The RTD Input Module uses galvanic isolation to protect the RTD input circuit, enhancing reliability and protecting the circuit from interference.