Technical Specifications:

• Rated Voltage: 230 V AC, single-phase, 50/60 Hz
• Rated Current: 5 A (direct) or 63 A (via external CT, 5 A secondary)
• Measurement Accuracy: ± 0.5% (active energy), ± 1% (reactive energy)
• Measured Parameters: Voltage (V), Current (A), Active Power (W), Reactive Power (VAR), Apparent Power (VA), Power Factor, Frequency (Hz), Energy (kWh/kVARh)
• Pulse Output: 1000 imp/kWh (optically isolated, open collector)
• Digital Input: 2 opto-isolated inputs (24 V DC)
• Communication: Modbus RTU (RS-485), baud rate 9600–115200 bps
• Supply Voltage: 230 V AC (self-powered) or 24 V DC (auxiliary)
• Power Consumption: < 4 W
• Operating Temperature: -20°C to +55°C
• Protection Rating: IP20 (DIN rail mount)
• Dimensions: 90 mm x 70 mm x 55 mm
• Weight: 200 g

Material Composition:

• Housing: Polycarbonate, light grey (RAL 7035), UL94 V-0
• Metering IC: Analog Devices ADE7753 or equivalent, 24-bit energy accumulator
• CT Input: 5 A secondary, burden < 1 VA
• Terminals: Phoenix Contact, screw-type, 4 mm²

Structural Features:

• DIN rail mountable (35 mm, EN 50022)
• 3 LED status indicators: Power, Communication, Pulse
• LCD display: 8-digit, 7-segment, yellow-green backlight
• DIP switches for CT ratio and communication address
• Optical isolation on pulse output and digital inputs

Working Principle:
Voltage is measured via a resistive divider network scaled to the metering IC input range. Current is measured via an external CT (5 A secondary) feeding a burden resistor connected to the metering IC. The ADE7753 performs true RMS calculation, active/reactive power computation, and energy accumulation using a 24-bit sigma-delta ADC at 900 kSPS. Data is transmitted via Modbus RTU and energy pulses are generated via an optocoupler-driven open-collector output (1000 imp/kWh).

Key Advantages:

• ± 0.5% energy accuracy for billing-grade metering
• Self-powered (no auxiliary supply needed for 230 V AC versions)
• Pulse output compatible with all standard energy management systems
• DIP-switch configurable CT ratio and Modbus address

Applicable Industries:
Sub-metering in commercial buildings, tenant billing, solar PV monitoring, EV charging stations, small industrial loads.

Installation Requirements:

• Mount on 35 mm DIN rail
• Connect CT around LINE conductor only (not around both L and N together)
• Set DIP switches for CT ratio (e.g., 100/5, 200/5, 400/5)
• Terminate RS-485 bus with 120 Ω at last device

Usage Precautions:

• Never open-circuit CT secondary while primary is energized (danger: high voltage)
• Verify CT polarity (P1/P2, S1/S2) before connecting
• Set Modbus address to unique value on each bus segment
• For 63 A applications, use CT with 5 A secondary (do not connect direct)