IoT monitoring device

2.Input pin overview

The device exposes seventeen dedicated input connections, grouped by signal type for supply, mains-level AC, low-level AC (for external sensors such as CTs), and general-purpose DC analog sensing.

Figures

Reference diagrams

Illustrations of the enclosure and interface layout. Use together with the pin grouping table above when planning field wiring.

3.Input supply (1 pin)

Powers the internal electronics and radio from an external DC source.

• Rating: 6–24 V DC nominal input range.
• Usage: Single supply rail for the complete device; select a source within the rated range and appropriate current capability for your installation.

4.AC high-voltage inputs (3 pins)

Isolated high-voltage channels for measuring AC potentials on distribution or branch circuits.

• Rating: Up to 300 V AC per channel (as specified for this design).
• Typical usage: Monitoring phase-to-neutral or line-to-line relationships on three-phase supplies (for example R–Y–B phase voltages) where direct mains measurement is required.

5.AC low-voltage inputs (3 pins)

Channels intended for low-amplitude AC signals from external transducers rather than direct mains connection.

• Rating: Up to 5 V AC at the input.
• Typical usage: Current transformers (CTs) or similar interfaces that deliver a proportional low voltage representing AC current on feeders or phases.

6.Analog DC inputs (9 pins)

General-purpose DC voltage inputs for industrial and building instrumentation.

• Range: 0–30 V DC measurable span (per channel specification).
• Typical usage: Pressure, level, temperature, flow, and other field devices that present a DC voltage proportional to the measured quantity.