GE IS220PHRAH1A HART Analog I/O Pack – 10-Channel Input & 2-Channel Output Module

Brand GE

Model GE IS220PHRAH1A HART

Product Overview

The GE IS220PHRAH1A is a HART-enabled analog input/output pack specifically engineered for installation within GE’s Mark VIe Speedtronic turbine control systems. As a critical component of the distributed I/O architecture, the GE IS220PHRAH1A serves as the electrical interface between the control system’s I/O Ethernet networks and a dedicated analog terminal board, providing local digitization, signal conditioning, and bidirectional HART protocol communication for smart field instruments. The pack is designed to handle mixed analog signal acquisition and output tasks, making it an essential building block for precise process variable monitoring and control in power generation environments.

Functionally, the GE IS220PHRAH1A implements 10 analog input channels and 2 analog output channels through a DC-62 terminal-board interface. The first eight input channels are individually configurable to accept either ±5 V voltage signals or 4-20 mA current loop inputs, while the remaining two channels support ±1 V or 4-20 mA configurations. Each input passes through a second-order passive low-pass filter network before being digitized by a 16-bit analog-to-digital converter, ensuring high measurement accuracy while preserving the HART frequency components superimposed on the analog signal. The GE IS220PHRAH1A maintains galvanic isolation on its channels, eliminating ground loops and enhancing noise rejection in electrically noisy turbine hall environments.

As a simplex-configured module within the Mark VIe platform, the GE IS220PHRAH1A supports dual 10/100 Mbps Ethernet connections to the IONet control network, with both network paths active simultaneously for enhanced fault tolerance. The pack incorporates an infrared serial communication port accessible from the front panel for diagnostic access even when both Ethernet connections are unavailable. This combination of robust analog signal handling, native HART capability, and redundant network connectivity positions the GE IS220PHRAH1A as a reliable interface solution for critical turbine control applications requiring advanced field device diagnostics and configuration capabilities.

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Description

Technical Specifications

Parameter Name	Parameter Value
Product Model	GE IS220PHRAH1A
Manufacturer	General Electric (GE)
Product Type	HART-Enabled Analog I/O Pack
System Platform	Mark VIe Speedtronic
Functional Acronym	PHRA
Analog Input Channels	10 (8 × ±5V/4-20mA, 2 × ±1V/4-20mA)
Analog Output Channels	2 (4-20 mA)
ADC Resolution	16-bit
DAC Resolution	14-bit
HART Modem Channels	2 modems, 6 channels each
Ethernet Ports	2 × RJ45 10/100 Mbps
Power Supply	28 V DC nominal
Power Consumption	Typically under 10 W
Operating Temperature	-30°C to +65°C
Storage Temperature	-40°C to +85°C
Humidity Range	Up to 95% non-condensing
Dimensions (H×W×D)	8.26cm × 4.19cm × 12.1cm
Compatible Terminal Boards	IS200SHRAH1A, IS200SHRAH2A
Mounting	Direct attachment via DC-62 connector
Configuration Support	Simplex only

Main Features and Advantages

The GE IS220PHRAH1A delivers a unique combination of high-density analog I/O and integrated HART communication within a compact, field-mountable package. Its design addresses the specific challenges of interfacing with smart field instruments in turbine control applications, where both precise analog measurement and advanced device diagnostics are essential for operational excellence.

High-Resolution Signal Processing with HART Overlay. The GE IS220PHRAH1A employs a 16-bit analog-to-digital converter and a 14-bit digital-to-analog converter to deliver measurement and control accuracy suitable for the most demanding turbine control loops. What distinguishes this pack from conventional analog I/O modules is its integrated HART modem capability. The GE IS220PHRAH1A supports bidirectional HART communication superimposed on standard 4-20 mA loops, enabling access to secondary variables, device diagnostics, and configuration parameters without interrupting the primary control signal. Each of the two HART modems handles six channels, with data update latency scaling according to channel utilization.

Flexible Input Configuration for Diverse Field Devices. The first eight analog input channels of the GE IS220PHRAH1A are individually software-configurable to accept either ±5 V voltage signals or 4-20 mA current loop inputs, providing adaptability to a wide range of field transmitter types. The final two input channels offer ±1 V or 4-20 mA configurations for specialized measurement requirements. When configured for current inputs, the terminal board supplies a 250Ω burden resistor that converts the 20 mA signal to a 5 V level for the pack’s input stage.

Dual Ethernet Connectivity with Simultaneous Operation. The GE IS220PHRAH1A features two auto-negotiating 10/100 Mbps Ethernet ports that operate concurrently, rather than in a traditional hot-backup arrangement. This architecture provides greater fault tolerance, as a failure of either network path does not disturb I/O pack operation, and the failure is indicated through the working network connection. The pack also includes an infrared serial diagnostic port accessible from the front panel for programming and status monitoring when Ethernet connectivity is unavailable.