7 Channel AC Power Monitoring Module with RS485 Modbus RTU | True RMS Energy Meter
Product No.: ZH-40074
Simultaneous Monitoring of 7 AC Circuits
High Accuracy True RMS Measurement
Voltage Range:Customizable up to 500VAC
Current Range:20mA,100mA,1A,5A AC (customizable)
Using independent voltage and current inputs for each channel, the module provides accurate monitoring of:
- AC Voltage
- AC Current
- Active Power
- Reactive Power
- Power Factor
- Frequency
- Forward Energy
- Reverse Energy
Through the standard RS485 Modbus RTU interface, the module can be easily connected to PLCs, SCADA systems, BMS platforms, energy management systems, data loggers, and industrial IoT gateways.
Specification
| Item | Specification |
|
Product Model |
ZH-40074 |
|
Measurement Channels |
7 Channels |
|
Measured Parameters |
Voltage, Current, Active Power, Reactive Power, Power Factor, Frequency, Energy |
|
Measurement Method |
True RMS |
|
ADC Resolution |
24-bit |
|
Accuracy |
0.2% FS |
|
Voltage Range |
Customizable up to 500VAC |
|
Current Range |
20mA,100mA,1A,5A AC (customizable) |
|
Frequency Range |
40Hz–70Hz |
|
Frequency Response |
30Hz–1000Hz |
|
Isolation Voltage |
>2500VDC |
|
Communication Interface |
RS485 |
|
Protocol |
Modbus RTU |
|
Baud Rate |
4800–115200bps |
|
Sampling Update Rate |
20ms–1000ms Adjustable |
|
Power Supply |
9–30VDC / 9–55VDC / 220VAC |
|
Power Consumption |
<0.8W |
|
Installation |
DIN Rail / Screw Mount |
|
Operating Temperature |
-20°C to +70°C |
|
Dimensions |
145 × 90 × 40 mm |
1.Industrial Automation
Monitor equipment power consumption and operating efficiency.
2.Energy Management Systems (EMS)
Collect multi-circuit electrical data for centralized energy analysis.
3.Data Center Monitoring
Monitor branch circuits inside server cabinets and distribution panels.
4.Aging Test Equipment
Measure power consumption during product burn-in and reliability testing.
5.Manufacturing Production Lines
Track machine energy usage and identify abnormal power conditions.
6.Smart Building Monitoring
Integrate with BMS systems for building energy management.
FAQ
Q1. What parameters can the module measure?
The module measures AC voltage, current, active power, reactive power, power factor, frequency, forward energy, and reverse energy.
Q2. Does it support Modbus RTU communication?
Yes. The module communicates through RS485 using the standard Modbus RTU protocol.
Q3. Can it monitor all 7 channels simultaneously?
Yes. All seven channels are sampled independently and measured simultaneously.
Q4. Is the module suitable for non-sinusoidal loads?
Yes. It uses True RMS measurement technology, making it suitable for distorted waveforms and non-linear loads.
Q5. Can I connect it to a PLC?
Yes. It can be integrated with most PLCs, SCADA systems, industrial computers, and IoT gateways via Modbus RTU.
Q6. What isolation protection does the module provide?
Each channel is isolated, and the power supply, communication interface, and measured circuits are isolated with more than 2500VDC withstand voltage.
Q7. What industries commonly use this product?
Applications include:
- Data centers
- Industrial automation
- Energy management systems
- Smart factories
- Electrical testing equipment
- Building energy monitoring
- Solar and renewable energy monitoring
