Hitachi LPF200A

Technical Dossier

Product Details And Specifications

Hitachi LPF Series Technical Notes

The Hitachi LPF Series Low Pass Filter Boards are analog signal conditioning components deployed across heavy industrial control architectures, including distributed control systems (DCS) in petrochemical refineries, nuclear power generation facilities, and large-scale chemical processing plants. The LPF Series functions as an analog signal integrity layer, attenuating high-frequency noise from field instrumentation before signals reach the controller's analog input modules. In facilities where 4–20 mA loop integrity is critical to process safety, these boards represent a non-negotiable element of the I/O subsystem. Hitachi's LPF boards are designed for direct integration into the HIDIC and EX Series control backplanes, and their long service history means a significant installed base remains active in aging plant infrastructure worldwide.

The Evolution of LPF Series Architecture

Q: How are RFQ terms confirmed?
A: Quantity, required condition, documentation needs, destination and sourcing route are confirmed during RFQ review before quotation.

LPF Series Full Catalog & Functionalities (SKU List)

The following SKUs represent verified components within the Hitachi LPF Series and associated analog signal conditioning range. Each entry reflects a distinct hardware configuration or cutoff specification:

Quality Control for the LPF Series Range

Low pass filter boards present specific verification challenges due to their passive and active analog circuit architectures. DriveKNMS applies a structured test protocol to all LPF Series units prior to shipment. Each board undergoes visual inspection for capacitor bulge, PCB trace corrosion, and connector pin integrity — failure modes common in boards stored in non-climate-controlled environments. Functional testing is performed using calibrated signal generators and precision measurement equipment to verify cutoff frequency accuracy within ±5% of the rated specification. For boards with onboard active components (LPF400A, LPF400B, LPF950A), supply rail voltage regulation and output noise floor measurements are recorded. Backplane connector contact resistance is measured to confirm compatibility with S10 and S10V rack systems. All test data is retained and available for customer review. Units that do not meet specification thresholds are quarantined and not offered for sale.