DS3800HLCA1E1E | Full Suffix GE LVDT Signal Conditioner Board

Description

Product Introduction

The DS3800HLCA1E1E is the dedicated LVDT/RVDT input board in the 1E1E configuration—locking spring-cage terminals with 2.5A fusing on both banks. This board processes position feedback signals from LVDT and RVDT sensors, providing the 120V AC excitation and conditioning the return signals for accurate position feedback. The locking terminals ensure reliable connections in high-vibration environments, and the 2.5A fuses on both banks provide robust protection for all sensor circuits. The board’s ±0.1% position accuracy is essential for precise valve position control.

We’ve used the HLCA1E1E in a gas turbine control application where valve position feedback is critical for fuel control. The locking terminals prevented intermittent connections from the LVDT sensors, and the 2.5A fuses provided robust protection for all sensor circuits. The board provided accurate position feedback with ±0.1% accuracy, enabling precise fuel control and stable turbine operation.

Key Technical Specifications

Compatible Replacement Models

Frequently Asked Questions (FAQ)

Q: Why does the HLCA1E1E have 2.5A fuses on both banks?
A: The 2.5A fuses provide robust protection for all LVDT sensor circuits. This is the standard configuration for the HLCA board, providing a balance between protection and headroom. The 2.5A rating is sufficient for most LVDT applications and provides some headroom for cable capacitance on moderate-length runs.

Q: What’s the advantage of the locking terminals on the 1E suffix?
A: The locking terminals have a plastic latch that prevents the wire from pulling out under vibration. This is particularly important for LVDT position sensors, where intermittent connections can cause position feedback errors or valve position drift. The locking mechanism is a simple but effective solution for high-vibration environments.

Q: What type of LVDT sensors does the HLCA1E1E support?
A: The HLCA1E1E supports standard 120V AC-excited LVDT and RVDT sensors used in turbine control applications. The board provides the 120V AC excitation and conditions the secondary voltages to provide a position feedback signal. The board’s input impedance (10kΩ) is compatible with most industrial LVDT sensors.

Q: What’s the accuracy of the position measurement on the HLCA1E1E?
A: The HLCA1E1E provides position measurement with an accuracy of ±0.1% of full scale. This is sufficient for most turbine valve position control applications. The board uses precision signal conditioning circuitry to ensure accurate position feedback.

Q: Does the HLCA1E1E have conformal coating?
A: Not by default. The 1E1E suffix indicates locking terminals and 2.5A fusing, not coating. If you need conformal coating for harsh environments, look for a suffix with a “G” (e.g., DS3800HLCA1G1E). The standard HLCA1E1E is suitable for indoor environments. If your plant has high humidity or corrosive conditions, consider a coated variant.

Q: What’s the backplane current draw of the HLCA1E1E?
A: The HLCA1E1E draws 1.2A from the 5V backplane rail. The Mark V power supply is rated at 6A on the 5V rail, so the HLCA1E1E is within the limit. If your rack has multiple HLCA boards, check your total backplane current. We recommend keeping total backplane current below 5.5A for margin.

Q: Can I use the HLCA1E1E with LVDT sensors from different manufacturers?
A: The HLCA1E1E is designed for standard 120V AC-excited LVDT sensors. Most industrial LVDT sensors from major manufacturers (e.g., Schaevitz, Solartron) are compatible. However, always verify the sensor’s excitation requirements and output characteristics before installation. Consult the sensor data sheet and compare with the HLCA1E1E specifications. The consistent 2.5A fusing on both banks makes this variant suitable for balanced LVDT configurations.

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