DS3800HLEA1C1C | GE Mark V LVDT/RVDT Output Module

Description

Product Introduction

The DS3800HLEA1C1C is the dedicated LVDT/RVDT output board in the 1C1C configuration—locking spring-cage terminals with 1A fusing on both banks. This board provides the 120V AC excitation signals for LVDT and RVDT position sensors used on turbine valves and actuators. The locking terminals ensure reliable connections in high-vibration environments, and the 1A fuses on both banks provide consistent protection for all excitation circuits. The HLEA1C1C is used in conjunction with LVDT input boards to complete the position feedback loop for valve position control.

We’ve used the HLEA1C1C in a gas turbine control application where stable excitation signals were required for the LVDT sensors on the fuel control valves. The locking terminals prevented intermittent connections in the high-vibration environment, and the 1A fuses provided consistent protection for the excitation circuits. The board provided stable 120V AC excitation, enabling accurate position feedback for the fuel control valves.

Key Technical Specifications

Compatible Replacement Models

Frequently Asked Questions (FAQ)

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

Q: Why does the HLEA1C1C have 1A fuses on both banks?
A: The 1A fuses provide consistent protection for all excitation circuits. This is a balanced configuration that provides adequate protection while offering some headroom. The 1A rating is sufficient for most LVDT excitation applications with moderate cable runs.

Q: What type of LVDT sensors does the HLEA1C1C support?
A: The HLEA1C1C supports standard 120V AC-excited LVDT and RVDT sensors used in turbine control applications. The board provides the 120V AC excitation at 50/60Hz, which is compatible with most industrial LVDT sensors.

Q: Does the HLEA1C1C provide stable excitation voltage?
A: Yes, the HLEA1C1C provides stable 120V AC excitation voltage for the LVDT sensors. The board uses precision signal generation circuitry to ensure stable and accurate excitation, which is essential for accurate position feedback.

Q: Does the HLEA1C1C have conformal coating?
A: Not by default. The 1C1C suffix indicates locking terminals and 1A fusing, not coating. If you need conformal coating for harsh environments, look for a suffix with a “G” (e.g., DS3800HLEA1G1C). The standard HLEA1C1C 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 HLEA1C1C?
A: The HLEA1C1C draws 1.2A from the 5V backplane rail. The Mark V power supply is rated at 6A on the 5V rail, so the HLEA1C1C is within the limit. If your rack has multiple HLEA boards, check your total backplane current. We recommend keeping total backplane current below 5.5A for margin.

Q: Can I use the HLEA1C1C with LVDT sensors from different manufacturers?
A: The HLEA1C1C is designed for standard 120V AC-excited LVDT sensors. Most industrial LVDT sensors from major manufacturers are compatible. However, always verify the sensor’s excitation requirements and output characteristics before installation. Consult the sensor data sheet and compare with the HLEA1C1C specifications. The locking terminals on the 1C suffix make this variant ideal for high-vibration turbine installations with consistent excitation requirements.

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