Single-Phase AC Power Collector
Product No.: ZH-4023A
Current range:1mA-100A AC(Can be customized)
Voltage range:10V-500V AC(Can be customized)
DIN-Rail Mounted,High Accuracy & Isolation
Wide-Range Power Input
Single-Phase AC Power Transducer with Relay Output, RS485 Modbus RTU Power Meter
Product Overview
The ZH-4023A is an industrial-grade Single-Phase AC Power Transducer Module designed for comprehensive electrical parameter monitoring and automated threshold alarming. Utilizing True RMS (TRMS) measurement, it provides accurate analysis of AC voltage, current, active power, reactive power, power factor, frequency, and cumulative energy—even in variable frequency equipment environments.
Built-in with a programmable alarm relay (supporting upper/lower limit and window modes), the ZH-4023A delivers reliable real-time protection and telemetry via an isolated RS485 Modbus RTU interface. It integrates seamlessly into PLC control systems, SCADA platforms, and smart energy management architectures.
Model Selection
ZH-4023A-14D2:Current through-hole input,power type
ZH-4011-14D2:AC voltage type
ZH-4012A-14D2:Through-hole input,AC current type(5-100A)
ZH-4012-14D2:Terminal input,AC current type(more than 100A)
ZH-4022A-14D2:Through-hole input,2 channel AC current type
Feature:
1.The sampling period can be set at seven rates: 20ms, 40ms, 60ms, 80ms, 100ms, 400ms, and 1000ms.
2. It has multiple communication formats such as odd parity, even parity, no parity, and 2-stop bits that can be freely set.
3. The electricity has the function of accumulating and storing in both forward and reverse directions, and has the function of saving in case of power failure.
4. Multiple work operation indicator lights, with a red light indicating normal product operation (flashing for 100ms) and a green light indicating product communication.
5. Equipped with a relay alarm output, it can set four threshold alarm functions: upper limit, lower limit, within area, and outside area.
6. Strong anti-interference ability, input, output, and power ports can withstand surge voltages of up to 2KV or more
7. True RMS measurement, applicable to the measurement of variable frequency equipment.
8.Available with wide power supply options: DC: 10-30V or 10-55V.
Technical Specifications
1mA-300A AC, can be customized according to needs.
Among them, terminal type is used for those less than 5A, perforated type is used for 5A-100A,
and external terminal transformer is used for those greater than 100A
no parity/odd parity/even parity, 8 data bits,1 stop bit
Or special method: no checksum, 9 digits (the 9th digit can be set to 1 or 0)
Note: The default factory parameters for this product are: Address 1, baud rate 9600, no checksum, 8 data bits, and 1 stop bit
Parameter
Specifications
Accuracy level
Comprehensive accuracy better than 0.5%, voltage and current 0.2%
Current range
Voltage range
10V-500V AC, can be customized according to needs.
Voltage input impedance
2KΩ/V(i.e. input voltage of 250V with impedance of 500KΩ)
Current input perforation aperture
ф9mm
Frequency response
30Hz-1KHz
Working temperature
-20 ℃ to+60 ℃
Temperature drift
≤ 100ppm/℃
Data update time
20ms,40ms, 60ms,80ms,100ms (default), 400ms,1000ms
Isolation withstand voltage
>2500V DC
Auxiliary power supply
+10V~+30VDC or+10V~+55VDC
Rated power consumption
<1W
Relay output
Contact capacity 250VAC/30VDC/5A; A set of normally open contacts
Output interface
RS485 (standard Modbus RTU communication protocol)
Data output
parameters such as voltage, current,active power, power factor, reactive power, forward and reverse electrical measurements,etc
Communication baud rates
2400,4800,9600,19200,38400,57600,115200bps
Data format
Appearance dimensions
83 * 37 * 52mm
Application:
1.VFD / Inverter Equipment Monitoring
True RMS with 1.4kHz bandwidth accurately captures non-sinusoidal waveforms from variable frequency drives.
2.High-Voltage Power Distribution Monitoring
Direct measurement up to 1000V AC—no external PT required. Ideal for switchgear and distribution panel metering.
3.Bidirectional Energy Management
Separate forward/reverse energy accumulation supports solar PV self-consumption monitoring and grid-tied applications.
4.Industrial Process Automation
Dual RS485 + Ethernet ports enable simultaneous local HMI display and remote SCADA integration.
FAQ
Q1: How does the built-in relay alarm function work on the ZH-4023A?
A: The module includes an internal relay (250VAC/5A) that can be configured to trigger automatically based on monitored parameters (such as over-voltage, over-current, or power limits). You can program 4 threshold alarm logic modes via Modbus registers: Lower Limit, Upper Limit, In-Range, and Out-of-Range.
Q2: Is the bi-directional energy data saved when power is cut off?
A: Yes. The ZH-4023A tracks both forward and reverse active/reactive energy accumulation and automatically saves the data to non-volatile memory in the event of a power outage.
Q3: Can this module measure variable frequency drives (VFD) or distorted AC waveforms?
A: Yes. Featuring True RMS (TRMS) conversion and a wide frequency response of 30Hz to 1kHz, the module delivers accurate measurements even under frequency-converted or non-sinusoidal conditions.
Q4: How do I reset the module to factory default address and baud rate?
A: Short-circuit terminal 3 (INT) and terminal 4 (G), then power on the module. Once released, the device resets to Factory Default settings: Address 1 and Baud Rate 9600 bps.
Why Choose Us
1.Multi-Functional Integration:
Combines power metering, telemetry, and alarm relay control into a single compact DIN-rail footprint, reducing hardware panel cost.
2.Factory-Direct Precision Calibration:
Calibrated using high-precision standard equipment to guarantee less than 0.5% comprehensive measurement precision across broad dynamic ranges.
3.Industrial Ruggedness:
Engineered with 3-way galvanic isolation and >2KV surge immunity to protect connected PLCs and gateways from ground loops and harsh transients.
4.Seamless PLC/IoT Compatibility:
Standard Modbus RTU commands allow plug-and-play integration with major industrial automation platforms.
