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SPECIFICATIONS:
Part Number: IS220PRTDH1A, REV G
Manufacturer: General Electric
Series: Mark VIe
Product Type: Input Module
Number of Channels: 8
RTD types: 10, 100, and 200
Span: 0.3532 to 4.054 V
A/D Converter Resolution: 14-bit
Resolution: 16-bit to 24-bit ADC
Scan time Normal scan: 250 ms
Excitation Current: 0.5mA to 1mA
Input Impedance: High (>10MΩ)
Power Supply: 24V DC
Common Mode Voltage Range: ±5 Volts
Operating Temperature: -40°C to +85°C
Maximum Lead Resistance: 15 Ω maximum
Mounting: DIN Rail
Availability: In Stock
Country/Region of Manufacture: United States
Manual: GEH-6721L
FUNCTIONAL DESCRIPTION:
IS220PRTDH1A, REV G 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 PRTD provides the electrical interface between one or two I/O Ethernet networks and an RTD input terminal board. The pack contains a processor board common to all Mark VIe distributed I/O packs and an acquisition board specific to the thermocouple input function. The I/O pack is capable of handling up to eight RTD inputs and can handle 16 RTD inputs on the TRTD terminal boards. Input to the pack is through a DC-37 pin connector that connects directly with the associated terminal board connector, and a three-pin power input. Output is through dual RJ45 Ethernet connectors. Visual diagnostics are provided through indicator LEDs, and local diagnostic serial communications are possible through an infrared port.
COMPATIBILITY:
PRTDH1A is compatible with the RTD input terminal boards TRTDH1D, H2D, and the SRTD board, but not the DIN-rail mounted DRTD board. The following table gives details of the compatibility.
The PRTD provides galvanic isolation of the TRD input circuit. This requires changes in the terminal board transient protection, provided on the TRTDH1D and TRTDH2D boards. The H1D version of the board provides filtering compatible with the standard scan rate of PRTD. The H2D version of the terminal board provides less filtering to allow proper performance when the fast scan rate of PRTD is selected. If PRTD is mounted on an earlier revision of the TRTD board, an incompatibility will be reported, although no physical damage will occur.
INSTALLATION:
Directly plug one or two PRTD (for simplex control of eight or 16 RTDs) into the terminal board connectors. Mechanically secure the packs using the threaded inserts adjacent to the Ethernet ports. The inserts connect with a mounting bracket specific to the terminal board type. The bracket location should be adjusted such that there is no right angle force applied to the DC-37 pin connector between the pack and the terminal board. The adjustment should only be required once in the life of the product.
Plug in one or two cables (depending on system configuration) to negotiate proper operation over either port. If dual connections are used the standard practice is to hook ENET1 to the network associated with the R controller. Apply power to the pack by plugging in the connector on the side of the pack. It is not necessary to insert this connector with the power removed from the cable as the I/O pack has inherent soft-start capability that controls the current inrush on the power application.
PROCESSOR BOARD OPERATION:
The processor board interfaces with an acquisition board tailored to the I/O pack’s function. When power is applied, the soft-start circuit gradually increases the voltage to the processor board. Local power supplies activate in sequence, and the processor exits reset mode. It then performs self-tests and loads application-specific code from flash memory. This code verifies board ID information to ensure compatibility between the application, acquisition, and terminal boards. If the match is valid, the processor initiates Ethernet communication by requesting a network address via DHCP, using a unique identifier from the terminal board. Once Ethernet is initialized, the processor configures on-board logic, executes the application, and enables the acquisition board to operate.
STATUS LEDS:
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What is an RTD Input Module?
An RTD Input Module is a specialized device designed to interface with Resistance Temperature Detectors (RTDs) and measure temperature with high accuracy. It converts the resistance variations of RTDs into precise temperature readings, which are then used for industrial process control and monitoring applications.
What types of RTDs are supported?
Most RTD input modules support common RTD types, including PT100, PT500, and PT1000, as well as Ni100, Ni120, and Cu10. These variations differ in material composition, resistance characteristics, and temperature range, allowing flexibility in different industrial and environmental conditions.
How accurate is the RTD input module?
The accuracy of an RTD input module typically falls between ±0.1°C and ±0.5°C, depending on factors such as sensor type, wiring configuration, and signal processing capabilities. High-quality modules with advanced signal conditioning and compensation techniques offer improved accuracy, ensuring precise temperature readings.
