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IS220PHRAH1A REV D

IS220PHRAH1A, REV D - Analog I/O Module

IS220PHRAH1A, REV D - Analog I/O Module IS220PHRAH1A, REV D - Analog I/O Module

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SPECIFICATIONS

Part Number: IS220PHRAH1A, REV D
Manufacturer: General Electric
Series: Mark VIe
Product Type: Analog I/O Module
Output converter: 14-bit D/A converter
Size: 8.26 cm high x 4.19 cm wide x 12.1 cm deep
Technology: Surface-mount
Availability: In Stock
Country of Manufacturer: United States (USA)

Functional Description

IS220PHRAH1A, REV D is an Analog I/O Module revision D version manufactured by General Electrics. It is a part of the Mark VIe control system. The Highway Addressable Remote Transducer (HART) Enabled Analog Input/Output (PHRA) pack is a versatile interface that facilitates connectivity between analog input/output devices and one or two Ethernet I/O networks, specifically within the Mark VIe distributed I/O systems.

Features

  • The pack includes a shared processor board common across all Mark VIe I/O packs.
  • An acquisition board, specialized for analog input operations, is built into the PHRA to provide accurate data acquisition for varied input/output types.
  • The first eight inputs are configurable as either ±5 V voltage inputs or as 4-20 mA current loop inputs, allowing for a range of analog devices.
  • The last two inputs can be configured for either ±1 mA or 4-20 mA current inputs, adding flexibility for low-range or standard current devices.
  • Current loop inputs utilize load termination resistors situated on the terminal board. The PHRA senses voltage across these resistors, enabling accurate current measurement.
  • The PHRA supports two 4-20 mA current loop outputs, making it suitable for standard control applications requiring analog output signals.
  • When configured in 4-20 mA mode, the PHRA pack is capable of HART communication. It can relay HART messages, facilitating communication between HART-enabled field devices and an Asset Management System (AMS).
  • HART-enabled field devices, such as smart sensors and transmitters, can be connected to any of the available analog input or output channels, enabling advanced diagnostics and data handling through the AMS.

Analog Output

  • The PHRA pack offers two 4-20 mA analog output channels with a compliance voltage of up to 18 V, making it suitable for interfacing with a wide range of field devices that require current-based control signals. Each analog output channel is managed by a 14-bit Digital-to-Analog Converter (DAC) that provides precise current regulation through a reference control loop.
  • A 14-bit DAC controls the analog output by sending a current reference signal to the current regulator loop within the PHRA pack.
  • The DAC's high resolution enables smooth, accurate adjustments in output current, crucial for applications demanding precise control within the 4-20 mA range.
  • The current regulator loop continuously monitors the output current in two locations: This internal sensing provides real-time information about the PHRA's current output performance.
  • The PHRA also senses the total output current at the terminal board level, ensuring accuracy in external current measurement, which is essential for diagnostics and troubleshooting.
  • Each analog output channel provides detailed feedback signals, ensuring continuous monitoring and system integrity. Current Reference Voltage Displays the command voltage from the DAC, reflecting the target current setpoint for the regulator loop. Individual Current Shows the exact output current sourced within the PHRA, helping verify correct current delivery to the field devices. Total Current (Terminal Board Level) Measures the combined current as sensed from the terminal board, enabling verification of accurate current flow through the connected external devices.

WOC supports a large number of GE Speedtronic Mark VIe parts. Contact us if you require additional information or have a question.

Frequently Asked Questions

 

What is IS220PHRAH1A, REV D?
It is an Analog I/O Module revision D version manufactured by General Electric.

How is the analog output controlled in the PHRA?
The output is managed by a 14-bit Digital-to-Analog Converter (DAC), which generates a precise current reference for the current regulator loop. This high-resolution DAC provides fine control over the output current.

What is the purpose of the current regulator loop in the PHRA?
The current regulator loop ensures that the output current precisely matches the setpoint defined by the DAC’s reference. It also senses the current in two places: within the PHRA pack and at the terminal board, allowing for accurate current control and real-time monitoring.

Why is total current sensing at the terminal board important?
Total current sensing at the terminal board allows for precise monitoring of the current being sent to external field devices. This feedback helps verify the integrity of the output signal and can aid in diagnosing any discrepancies or faults in the system.