Key Features
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10 Analog Input Channels – First 8 channels configurable for ±5V DC, ±10V DC, or 0–20 mA; last 2 channels for ±1 mA or 0–20 mA
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2 Analog Output Channels – 0–20 mA output for driving control valves and actuators
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16-Bit ADC / 14-Bit DAC – High-resolution conversion for precise signal processing
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Dual Redundant Ethernet – Two 100 Mbps RJ45 ports for deterministic I/O network communication and failover redundancy
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2500V AC Galvanic Isolation – Field-to-logic isolation protects control electronics from ground loops and transients
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Hot-Swap Capable – Module replacement without system shutdown in redundant configurations
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ATEX Zone 2 Certified – Suitable for hazardous area installation
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Integrated Transmitter Power – 24 V DC excitation output for 2-wire transmitters
Technical Parameters
Core Advantages
1. High-Precision Signal Processing
The PAICH1B employs 16-bit ADC and 14-bit DAC converters to deliver exceptional measurement accuracy and precise output control. This resolution is critical for turbine control applications where small variations in pressure, temperature, or flow signals directly impact combustion efficiency, emissions, and mechanical integrity.
2. Distributed Ethernet Architecture
Unlike traditional backplane-based I/O, the PAICH1B operates as a standalone distributed I/O pack connected via dual redundant 100 Mbps Ethernet. This architecture reduces analog cable runs by up to 70%, lowers installation costs, and minimizes noise pickup by allowing remote mounting near field sensors.
3. Redundant Communication and Hot-Swap
The dual RJ45 Ethernet ports provide redundant communication paths to the Mark VIe controller. If one network path fails, the module continues operating on the remaining link. The hot-swap capability allows module replacement under power in redundant configurations, reducing turbine downtime during maintenance to under 10 minutes.
4. TMR System Compatibility
The PAICH1B supports Triple Modular Redundant (TMR) configurations. In TMR systems, three independent I/O packs operate in parallel, and a built-in “suicide relay” function isolates a faulted output from the terminal board, preventing interference with other normally operating modules and maintaining overall system stability.
5. Hazardous Location Certification
With ATEX Zone 2 and UL E207685 certifications, the PAICH1B can be mounted directly in classified gas/dust areas without purging or special enclosures. This flexibility reduces infrastructure costs and simplifies installation in oil and gas, petrochemical, and power generation facilities.
Applications
The IS220PAICH1B is deployed across critical turbine and process control applications:
Compatible Terminal Boards
The IS220PAICH1B is approved for use with the following terminal boards:
Important Compatibility Note: The IS220PAICH1B is not backward-compatible with PAICH1A terminal blocks. Verify the mating terminal board before swapping modules.
Recommended Models & Related Products
What's Included
Note: Terminal board, field cables, and ToolboxST configuration software are sold separately.
Why Buy From Us?
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In Stock – Ready to ship immediately
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Fully Tested – Each module verified for functionality
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Warranty Included – 12-month warranty for purchase confidence
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Technical Support – Compatibility assistance available
Frequently Asked Questions (FAQ)
Q1: What is the GE IS220PAICH1B?
It is an Analog Input/Output (PAIC) Pack for the GE Mark VIe turbine control system. It acquires analog field signals and drives analog output devices, communicating with the Mark VIe controller over a dual-redundant Ethernet I/O network.
Q2: What is the difference between IS220PAICH1A and IS220PAICH1B?
The PAICH1B is the updated technology replacement for the PAICH1A. It offers identical form, fit, and function with enhanced componentry for improved reliability and noise immunity. GE introduced the B revision as the standard replacement effective February 1, 2015.
Q3: How many analog inputs and outputs does this module have?
It provides 10 analog input channels and 2 analog output channels.
Q4: What input signal types are supported?
Channels 1–8 are configurable for ±10 V DC, ±5 V DC, or 0–20 mA. Channels 9–10 support ±1 mA or 0–20 mA.
Q5: What is the output signal range?
The 2 analog output channels provide 0–20 mA output current.
Q6: Does this module support hot-swapping?
Yes. The Mark VIe architecture supports hot-swappable I/O packs under specific conditions. Module replacement can be performed without system shutdown in redundant configurations, typically in under 10 minutes.
Q7: What terminal boards are compatible with the IS220PAICH1B?
Approved terminal boards include IS200STAIH1A, IS200STAIH2A, IS200TBAIH1C, IS400STAIH1A, IS400STAIH2A, and IS400TBAIH1C.
Q8: Is this module certified for hazardous locations?
Yes. It carries ATEX Zone 2, Group IIC certification and UL E207685 approval for non-hazardous and hazardous area installations when used with approved terminal boards.
Q9: What is the power supply requirement?
The module operates on 22.5–28.6 V DC (nominal 24/28 V DC) with a maximum current consumption of 0.49 A.
Q10: What should I verify before ordering?
Always verify the exact part number (PAICH1B vs. PAICH1A vs. PAICH2B), confirm your terminal board compatibility (STAI or TBAI series), and check your system configuration (simplex, dual, or TMR).
