PCH1026CHF861016 - Process Control Hybrid I/O Board

PCH1026CHF861016 – Process Control Hybrid I/O Board

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Product Introduction:
The PCH1026CHF861016 is a specific hardware revision of the PCH1026 Process Control Hybrid board. The long suffix “CHF861016” is the full part number that encodes the exact revision, feature set, and manufacturing configuration. This revision includes all the features of the base PCH1026 but adds specific enhancements such as improved thermal management, updated analog-to-digital converters for higher accuracy, enhanced isolation barriers, and revised firmware for better diagnostics and compatibility with newer Mark V software versions. The “CHF” prefix within the revision code indicates a specific feature package (likely “Chassis Hardware Feature” or similar internal GE designation).

Technical Specifications:
Board Type: Process Control Hybrid (PCH1026)
Revision: CHF861016
Analog Inputs: 8 channels, 16-bit resolution (upgraded from 12-bit in older revisions)
Analog Input Ranges: 4-20mA, 0-10V, ±10V, RTD, Thermocouple (all types)
Analog Outputs: 4 channels, 16-bit resolution, 4-20mA or 0-10V
Digital Inputs: 16 channels, opto-isolated, 24V DC
Digital Outputs: 8 channels, relay outputs, 5A at 125V DC
Accuracy: +/- 0.05% of full scale (improved over base PCH1026)
Drift: Less than 5 ppm per degree Celsius (superior thermal stability)
Isolation: 2000V RMS channel-to-ground (upgraded from 1500V)
Noise Rejection: CMRR greater than 130dB (improved from 120dB)
Scan Rate: 50ms per analog channel (faster than base model)
Power: +5V (500 mA) from VMEbackplane
Form Factor: VMEbus Eurocard (6U height)

Functional Features:
Enhanced ADC: Uses 24-bit sigma-delta ADCs in the CHF revision for smoother and more accurate analog readings.
Improved Isolation: Higher isolation voltage (2000V RMS) provides better protection against voltage spikes and ground loops.

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