Product Overview

The GE IS220PAOCH1B is an Analog Output (PAOC) I/O Pack designed for Mark VIe control systems. It acts as the interface for converting digital commands from the controller into precise analog current loop signals. This pack is particularly useful for controlling field devices such as actuators, valves, and positioners in turbine control, power plant automation, and other industrial applications.

Paired with the IS230SNAOH2A, a Simplex Analog Output Terminal Board Assembly, this system provides a complete solution for reliable analog output control. The IS220PAOCH1B provides high-speed digital-to-analog conversion and is designed for non-redundant or distributed control configurations, with a typical configuration supporting 8 channels.

Key Technical Specifications

1. Output Capabilities
   The IS220PAOCH1B delivers precise analog outputs, ensuring the accuracy needed for critical control functions in industrial systems:

• Number of Channels: 8 Simplex Analog Output Channels.

• Output Type: 0–20 mA current loop for precise field device control.

• Maximum Load Resistance: Supports up to 900 Ω burden, ensuring compatibility with various field devices.

• Accuracy: ±0.5% of full scale over the entire temperature range, ensuring reliable output performance.

• Resolution: Features a 16-bit Digital-to-Analog Converter (DAC) for high-precision signal conversion.

2. Electrical Ratings
   The IS220PAOCH1B is designed to operate efficiently in power control applications:

• Power Input: Nominal 28.0 Vdc with a range from 27.4 Vdc to 28.6 Vdc.

• Current Consumption: Maximum of 0.45 Adc.

• Power Dissipation: Approximately 5.3 Watts, ensuring low power usage for long-term operation.

3. Processor & Communication
   The pack is integrated with intelligent diagnostics and communication features:

• Processor: The BPPx processor board handles local logic and diagnostics for efficient operation.

• Network: Dual RJ-45 100BASE-TX Ethernet connectors provide Ionet redundancy, ensuring reliable communication in industrial environments.

• Feedback: Each output channel features an internal Analog-to-Digital Converter (ADC) for loop verification to ensure the accuracy of the current output.

System Configuration Comparison

Environmental Specifications

The IS220PAOCH1B is engineered for industrial environments and adheres to stringent operational requirements:

• Operating Temperature: -30°C to +65°C (—22°F to +149°F), ensuring stable operation in various temperature conditions.

• Diagnostics: Includes LED indicators for Power, Status, and Ethernet Link. It features open circuit detection, high-resistance loop detection, self-test capabilities, and hardware limit monitoring for continuous operational integrity.

• Certification: Certified for Class I, Division 2 hazardous locations, suitable for use in environments with explosive gases or vapors. The pack also includes conformal coating (Revision H1B) to protect against moisture, dust, and corrosive chemicals.

• Humidity: Operates in 5% to 95% non-condensing humidity, ensuring reliable performance in various environmental conditions.

Applications

The IS220PAOCH1B is designed for industrial automation applications requiring analog output control, such as:

• Turbine and Power Plant Automation: Control actuators, valves, and other critical devices in power generation and distribution systems.

• Field Device Control: Ideal for controlling industrial equipment like positioners and valves in various automation systems.

• Control and Protection Systems: Provides high-precision output signals for complex systems, enhancing the safety and efficiency of industrial operations.

FAQ

Q: What type of field devices can the IS220PAOCH1B control?
A: The IS220PAOCH1B can be used to control various field devices such as actuators, valves, and positioners that require 0-20 mA current loop control.

Q: What is the maximum load resistance supported by this I/O pack?
A: The IS220PAOCH1B supports up to 900 Ω load resistance for the analog output channels.

Q: Can this I/O pack be used in redundant systems?
A: While the IS220PAOCH1B is designed for Simplex configurations, it features dual Ethernet connectors for redundancy in network communication. For Triple Modular Redundancy (TMR) configurations, a different terminal board would be required.

Q: How does the IS220PAOCH1B ensure output accuracy?
A: The pack uses a 16-bit Digital-to-Analog Converter (DAC) and features an accuracy of ±0.5% of full scale over the full temperature range, ensuring precise current loop outputs for field devices.