GE IS220PAICH1A I/O Pack | Mark VI Analog Module

The General Electric IS220PAICH1A is a versatile Analog Input/Output Pack for the Speedtronic Mark VI turbine control system. Designed for both hazardous and non-hazardous locations, this I/O pack provides reliable signal conditioning and conversion, interfacing directly with field sensors and actuators to enhance system reliability and reduce external instrumentation.

Core Technical Specifications

• Brand & Model: General Electric IS220PAICH1A
• Series: Speedtronic Mark VI Turbine Control System
• Module Type: Analog I/O Pack (PAIC)
• I/O Configuration: 12 channels total: 10 Analog Inputs, 2 Analog Outputs.
• Power Supply: Nominal 28 VDC (Range: 27.4 - 28.6 VDC).
• Weight: 1 lb 3 oz.

Signal & Electrical Specifications

• Analog Outputs: 2 channels, 0-20 mA current loop.
• Analog Inputs (Channels 1-8): Max 10 VDC, 20 mA current.
• Analog Inputs (Channels 9-10): Max 5 VDC, 20 mA current.
• Output Voltage Max: 16.3 VDC.
• Analog Transmitter Supply: Up to 25.2 VDC at 21 mA.

Physical Design & Integration

• Form Factor: Designed for installation in Mark VI 13-slot or 21-slot VME control racks.
• Front Panel: Features four status indicators (LEDs) and one I/O communication port.
• Typical Use: Commonly deployed in Triple Modular Redundant (TMR) system architectures for high availability.
• Compatible Terminal Boards: Interfaces with I/O terminal boards IS200STAIH1A, IS200STAIH2A, and IS20TBAIH1C.

Environmental & Safety Certifications

• Operating Temperature: -22°F to 149°F (-30°C to 65°C).
• Hazardous Location Ratings: Certified for Class I, Division 2, Groups A, B, C, D and ATEX Zone 2, Group IIC.
• Non-Hazardous Certification: UL Listed (File E207865).
• Safety Standards: Compliant with ANSI/ISA-12.12.01-2015.

System Role & Benefits

• Direct Sensor/Actuator Interface: Reduces need for interposing instrumentation, lowering potential points of failure and long-term maintenance costs.
• Enhanced Diagnostics: Enables direct interrogation of connected field devices for performance monitoring and predictive maintenance.
• High-Speed Integration: Part of a system capable of scanning up to nine VME I/O racks within a 40 ms cycle time.
• Software Fault Tolerance: Operates within Mark VI's SIFT (Software Implemented Fault Tolerance) architecture for robust control.

Frequently Asked Questions (FAQ)

What is the main function of this PAIC pack?

It conditions analog signals between the Mark VI controller and field devices. It reads analog sensor values (like temperature, pressure) via its inputs and sends analog control signals (like 0-20 mA) to actuators via its outputs.

Can this module be used in explosive atmospheres?

Yes, the IS220PAICH1A is specifically certified for use in Class I Div 2 and ATEX Zone 2 hazardous locations, making it suitable for many industrial and power generation environments.

What do the four LEDs on the front indicate?

They provide module status information, typically including power OK, communication status (IONet), fault indication, and possibly channel activity. Specific blink patterns are detailed in the Mark VI technical documentation.

How is this pack configured and powered?

It receives its configuration from the Mark VI control module via the IONet. It is powered by a 28 VDC supply connected through the VME backplane of the rack it is installed in.

What is the difference between this 'A' revision and the base model?

The 'A' suffix indicates a functional revision. The IS220PAICH1A is an updated version of the base IS220PAICH1 pack, incorporating improvements or fixes while maintaining the same core functionality and form factor.