1. General Information / Model Overview

️· Model: 48NDVA
️· Purpose: It appears to be a digital meter/indicator, likely for industrial applications.
️· Alarm Outputs: Available in two configurations:
- Code 0: No alarm outputs.
- Code 2: Two alarm outputs.
️· Website: http://www.m-system.co.jp/

2. Physical Dimensions & Mounting

️· Bezel Options:
- /F Bezel: Standard size, for compatibility with existing M-System 48 Series cutouts.
- /D Bezel: Option with rounded corners, also for specific existing cutouts.
- Panel Cutout Dimensions: Different dimensions are provided for single and clustered mounting, and compatibility with different panel types (Fuji Electric PAJ/PAK/PBA, M-System, etc.). The tolerances are critical to note.
️· Mounting:
- Single Mounting: Conforms to IP65 (dust and water protection). Panel thickness allowed: 1.6 - 8.0 mm.
- Clustered Mounting: Not IP65 compliant. Requires spacing for heat dissipation (minimum 3cm above and below units). The clustered mounting uses a formula to calculate total width based on the number of units (N).
️· Important Notes: No bezel required for clustered mounting.

3. Electrical Connections / Circuitry

️· Power Supply: 5V DC output. Clearly labeled positive (+) and negative (-).
️· Inputs/Outputs: Indicated as Hc, Ha, Hb, La, Lb, Lc (likely referring to high and low signals for alarm outputs, and possibly input signals).
️· Circuitry Diagram: A block diagram of the internal circuitry is provided. It highlights key components (amplifier driver, digital computation, display/setting). The diagram labels components 1 through 11 (or higher) and refers to connections/signals. The block diagram is complex and would require significant expertise to interpret fully.

4. Summary of Terms/Abbreviations

️· IP65: Ingress Protection rating – Dust and water resistance.
️· /F, /D: Bezel options (as described above).
️· Hc, Ha, Hb, La, Lb, Lc: Internal signal labels (likely related to alarms and inputs).
️· N: Number of units for clustered mounting.

Key Takeaways/Observations:

️· Detailed Specifications: These excerpts provide very detailed technical specifications, targeted at engineers and technicians involved in industrial automation.
️· Compatibility: Emphasis is placed on compatibility with existing panel cutouts, and providing different bezel options.
️· Alarm Functionality: The inclusion of alarm outputs (Code 2) indicates this meter is used in applications requiring alerts based on certain conditions.
️· Complex Internal Structure: The block diagram suggests a fairly sophisticated internal design.