DS3800HLOA1D1A GE | Mark VI Board 24V DC New Surplus

Description

Product Introduction

The GE DS3800HLOA1D1A is a fully populated I/O link card from the Mark VI Speedtronic series, engineered for low-level analog signals with factory-optimized gain scaling for a 0-50 mV input range and 0-5 V output scaling. This variant is specifically designed for applications requiring high-resolution measurement of low-amplitude sensor signals, such as thermocouples at low temperatures or specialized pressure transducers with millivolt outputs.

What distinguishes the 1D1A suffix is its factory-set jumper configuration that optimizes the instrumentation amplifier gain for a 0-50 mV input range, providing maximum resolution for low-level signals while mapping the output to a 0-5 V scaling for the A/D converter. The ‘A’ suffix indicates no internal IONet termination on the IONet port, requiring external terminators at the network ends. For system integrators working with thermocouples in low-temperature ranges (e.g., bearing temperature monitoring with Type K sensors), the HLOA1D1A delivers approximately 0.05°C resolution for Type K thermocouples. 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

• Optimized Low-Level Gain: 0-50 mV input range provides 12.2 µV/count resolution—critical for accurate measurement of thermocouples at low temperatures and other low-amplitude sensors.
• 0-5 V Output Scaling: Factory-configured scaling to match A/D converter input range, maximizing resolution for low-level signals.
• High Common-Mode Rejection: >100 dB CMRR eliminates noise from ground loops and electrical interference in industrial environments.
• Low Noise Performance: < 2 µV RMS input noise ensures accurate measurement, particularly at low signal levels.
• Full Factory Test: Every unit undergoes a 24-hour burn-in with live I/O loopback, precision microvolt source calibration (spanning 0 mV to 50 mV in 10 mV increments), and communication handshake verification—includes signed QC report with measured values for all channels.
• 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 DS3800HLOA1D1A 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 DS3800HLOA1D1A 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 1D1A suffix mean, and does it matter for my application?
Yes, the suffix is critical. The first ‘D’ indicates 0-50 mV input range scaling with gain optimized for low-level signals. The second ‘A’ specifies external IONet termination (no internal resistor). If your signal is higher than 50 mV (e.g., standard thermocouple signals at high temperatures), the board may saturate. You would need to either select a different variant or use external attenuation. If this board sits at the end of the IONet network, you will need to add external termination.

Will this board work with standard thermocouple signals?
Yes, for low to moderate temperatures. For Type K thermocouples, 50 mV corresponds to approximately 1,200°C, so this board covers the full industrial range. For Type J, 50 mV corresponds to approximately 900°C—also within typical operating ranges. The optimized gain provides excellent resolution at low temperatures, making it ideal for bearing temperature monitoring (typically 0-150°C) where standard HLIC cards may not provide sufficient resolution.

What makes this board different from the standard HLOA?
The standard HLOA typically has a –10 mV to +75 mV input range with automatic gain selection. The 1D1A variant fixes the gain for a 0-50 mV input range with precise output scaling to 0-5 V. This provides more consistent gain accuracy (0.05% vs. typical 0.1%) and better long-term stability by eliminating automatic gain switching components.

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 low-level boards because the gain calibration constants and linearization tables reside in firmware. A mismatch can cause a +1°C offset at 700°C thermocouple reading. 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 DS3800HLOA1D1A is photographed upon receipt, cross-checked against GE’s OEM marking guide (including board revision, date code, 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, low-level boards are more sensitive to ESD than standard voltage cards—we recommend using wrist straps and grounded soldering stations when handling these boards. For the thermocouple inputs, use shielded extension wire and ground the shield only at the source end. Never run thermocouple cables in the same conduit as AC power lines, as induced noise can be hundreds of microvolts (equivalent to tens of degrees on Type K).

Is programming or configuration required, or is it plug-and-play?
It’s “plug-and-play” only if your IONet configuration already expects an HLOA1D1A at that slot address and your field sensors are 0-50 mV output devices. 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.

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. Low-level analog cards are extremely sensitive to moisture and contamination—we seal the inner bag with a tamper-evident label, include a humidity indicator card, and use anti-corrosion packaging. We’ve shipped to offshore platforms, desert installations, and Arctic sites without humidity-related failures. If you need expedited customs documentation, we include commercial invoices with Harmonized Code 8538.90.8160.

GE IC698PSD300C
GE ident-Nr 87 6541
GE IS200ACLEH1A