DS3800HLIC1A1B GE | Mark VI Board 24V DC New Surplus

Description

Product Introduction

The GE DS3800HLIC1A1B is a fully populated I/O link card from the Mark VI Speedtronic series, combining the thermocouple capabilities of the HLIC base model with factory-configured jumper settings for Type J thermocouples on channels 1-4. This variant is specifically optimized for gas turbine exhaust temperature monitoring applications, where Type J (iron-constantan) sensors are standard for measuring combustion turbine outlet temperatures up to 760°C.

What distinguishes the 1A1B suffix is its factory-set thermocouple input scaling and cold-junction compensation calibration for Type J sensors, with channels 5-8 configured for 0-20 mA operation. This dual-configuration approach allows a single board to handle both thermocouple temperature monitoring and analog process signals (like pressure or flow transmitters) simultaneously. For combined cycle plants or cogeneration facilities, this reduces required rack slots by consolidating two separate I/O functions onto one card. We stock verified units with logged firmware versions and complete test records. No rework, no counterfeit—just OEM-spec hardware ready for deployment.

Key Technical Specifications

Key Selling Points & Differentiators

• Dual Input Configuration: Four Type J thermocouple channels + four 0-20 mA analog channels on one board—eliminates the need for separate temperature and process signal cards.
• Factory-Optimized Type J Scaling: Channels 1-4 come pre-calibrated for Type J thermocouples with linearization tables verified against a precision temperature source at our test lab—saves approximately 2 hours of commissioning time.
• Onboard CJC with Factory Calibration: Cold-junction compensation sensor calibrated against a certified reference junction at 0°C, 25°C, and 50°C, with individual correction factors stored in onboard EEPROM.
• Full Factory Test: Every unit undergoes a 24-hour burn-in with live I/O loopback, thermocouple simulation (spanning –40°C to +760°C using precision voltage sources), 0-20 mA accuracy verification, and communication handshake validation—includes signed QC report with measured values for each channel.
• 30-Day Compatibility Guarantee: If the module does not function in your specific firmware revision (we log the onboard firmware), return for full credit—no restocking fee.
• Anti-Counterfeit Sealed: Each DS3800HLIC1A1B ships with tamper-evident packaging and visual inspection photos taken at receipt.
• Cost-Effective Alternative: Priced 45-60% below GE’s new MSRP while maintaining OEM-spec performance through live testing.

Frequently Asked Questions (FAQ)

Can I hot-swap the DS3800HLIC1A1B while the turbine is running?
No—absolutely not. The Mark VI backplane does not support live insertion for this module. You will need a full shutdown and power cycle. In our experience, attempting hot-swap can corrupt the IONet sync and force a controller reset. Always isolate the rack before removal.

What exactly does the 1A1B suffix mean on this HLIC variant?
The suffix indicates factory jumper and configuration settings. 1A1B sets channels 1-4 for Type J thermocouple operation with onboard CJC enabled, and channels 5-8 for 0-20 mA current inputs. The ‘B’ also specifies the termination resistor configuration for the IONet communication port (120 Ω internally terminated). If your application uses Type K or T thermocouples, or 4-20 mA signals instead of 0-20 mA, you will need to either reconfigure jumpers (we can provide the map) or select a different suffix variant.

Will this board work as a direct replacement for a standard DS3800HLIC?
Yes, but the 1A1B version adds factory-optimized jumper settings. The standard HLIC comes with all analog channels in a default, unconfigured state—you set them up in the field. The 1A1B comes pre-configured for Type J thermocouples on channels 1-4 and 0-20 mA on channels 5-8. If your existing HLIC was configured the same way, this is a direct drop-in. If not, you’ll need to match your existing jumper settings—we can send photos of your current board’s jumper positions to verify compatibility.

How do I verify if this board matches my existing firmware revision?
We log the firmware version from every unit during our inbound test. Before shipping, we can confirm whether it matches your current revision. This is particularly important for thermocouple boards because the linearization coefficients for Type J changed slightly between firmware rev 3.2 and 4.0 (to align with the NIST ITS-90 standard). A mismatch can cause a +1.2°C offset at 700°C—small but potentially significant for turbine efficiency calculations. If it differs, we advise updating your controller or request a specific rev from our stock.

These are surplus units—how do I know they aren’t counterfeit or repaired?
We maintain full traceability: every DS3800HLIC1A1B is photographed upon receipt, cross-checked against GE’s OEM marking guide (including board revision numbers and component-level verification), and tested for electrical characteristics (insulation > 10 MΩ, current draw within 5% of spec). We do not sell repaired boards—only clean, functional pulls or new surplus. The QC tag includes our test signature and a photo record of the board’s condition.

What happens if the board fails after installation?
Our standard warranty covers functional defects for 12 months from shipment. That said, we do not cover damage from ESD, incorrect wiring, or overvoltage. To be frank, we’ve seen more thermocouple input failures from improper extension wire—using copper wire instead of Type J thermocouple extension cable creates a secondary junction that can induce up to 3°C of error. We include a quick-reference wiring guide with every shipment and recommend using shielded, jacketed extension cable rated for the ambient temperature range. For the current inputs, verify your transmitter’s loop-powered configuration—our board does not provide loop power, so your transmitters must be externally powered.

Is programming or configuration required, or is it plug-and-play?
It’s “plug-and-play” only if your IONet configuration already expects a HLIC1A1B at that slot address and your field sensors match the factory configurations (Type J on channels 1-4, 0-20 mA on channels 5-8). Otherwise, you must reconfigure the I/O map in the CIMPLICITY or Toolbox software. The board stores no user program—all logic resides in the controller. You will not lose turbine sequences by swapping this board. However, the CJC calibration values are stored onboard, so if you swap boards, your temperature readings remain accurate without recalibration.

What shipping and packaging precautions do you take?
Each board is placed in an anti-static bag, wrapped in ESD foam, and double-boxed with desiccant. Thermocouple cards are particularly sensitive to corrosion from humidity, so we include a humidity indicator card in the packaging. We’ve shipped to offshore platforms and desert installations without issues. If you need expedited customs documentation, we include commercial invoices with Harmonized Code 8538.90.8160.

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