Shinkawa BH-150-03 Signal Conditioner / Preamplifier Unit

Shinkawa BH-150-03 Signal Conditioner / Preamplifier Unit is a high-precision transducer interface manufactured by Shinkawa Electric. Designed for critical machinery protection systems, the BH-150-03 converts raw high-frequency signals from non-contact eddy-current proximity probes into calibrated, linear voltage or current outputs for real-time monitoring of shaft vibration, axial displacement, and rotational speed.

Technical Parameter List

Core Advantages & Product Features

High-Precision Linearization: Translates nonlinear probe gap changes into precise linear outputs across the full measurement range.

Low-Noise Circuit Design: Built-in hardware filtering suppresses high-frequency electrical noise and electromagnetic interference (EMI) in industrial environments.

Rapid Response Time: Delivers real-time signal transmission to enable immediate trip response during sudden shaft displacement or high vibration events.

Built-in OK Circuit Support: Monitors sensor loop health and cable continuity, preventing false machinery trip triggers in the event of wire damage.

Compact Field Housing: Rugged design allows close proximity installation near field probes, reducing raw high-frequency cable runs.

Model Classification

BH-150-03: Standard driver unit variant with designated gain and range configuration.

BH-150 Series (BH150): Base signal conditioner family for eddy-current probe systems.

VK-202A / VK-452A: Eddy-current displacement probes feeding raw input into BH-150 units.

VM-3D2 / VM-3V2: System rack monitor modules processing output signals from BH-series drivers.

Environmental Tolerance Conditions

Operating Temperature: -20°C to +70°C (-4°F to 158°F)

Storage Temperature: -30°C to +85°C (-22°F to 185°F)

Operating Relative Humidity: 5% to 95% RH (Non-condensing)

Vibration Resistance: Conforms to IEC 60068-2-6 guidelines for field instrumentation

Protection Rating: IP20 (Requires mounting inside an IP54 or NEMA 4X junction box)

Installation Method

Junction Box Mounting: Mount the BH-150-03 securely on a DIN rail or mounting plate inside a sealed local field terminal box near the machine.

Sensor Connection: Connect the probe extension cable to the coaxial connector on the BH-150-03. ensuring the connector insulator is clean and free of moisture.

Output Wiring: Wire power (-24V DC), common, and output signal lines using shielded twisted-pair cables.

Shielding & Grounding: Connect the cable shield braid to the system grounding point at the main monitor rack end only to prevent ground potential loops.

Operating Instructions

Gap Voltage Adjustment: Set physical probe distance using a digital multimeter on the output terminals until reading the designated electrical zero voltage (e.g., -10V DC) prior to locking the probe position.

Linearity Check: Perform annual zero/span checks with a precision micrometer fixture to verify output curve compliance.

Connector Care: Inspect field coaxial connections periodically for tight mechanical engagement and environmental seal integrity.