24-Channel DIN Rail 0-20mA 0-20V AC Voltage Current Data Acquisition Module

24-Channel DIN Rail 0-20mA 0-10V AC Current Voltage Data Acquisition Module RS485 Modbus-RTU

Product Overview
This product is a data acquisition module for real-time measurement of 24 channels of AC current (or voltage), which can also be mixed with voltage and current input. It uses high-precision current (voltage) transformers to achieve signal isolation and sensing. The signal measurement adopts a dedicated true RMS measurement chip, which can accurately measure the true RMS of various waveforms of current (voltage) with high accuracy and good stability; Adopting standard RS-485 bus interface and MODBUS-RTU protocol. Widely used in street lamp monitoring, production automation testing, LED lamp aging detection, etc.

Model Selection

ZH-40243-14F2:24 channel AC mixed acquisition module(You can specify any current or voltage input)

ZH-40241-14F2:24 channel AC voltage acquisition module

ZH-40242-14F2:24 channel AC current acquisition module

Product Features
1.24 channels of synchronous sampling are mutually independent A/D, and data acquisition and update for all 24 channels are completed in 0.1 seconds;
2. High precision, using 24 bit A/D sampling, linear dynamic range can reach 1000:1;
3. Good stability, measurement accuracy is not affected by environmental temperature;
4. True RMS measurement, accurate measurement, suitable for various waveforms;
5. The communication address and baud rate have two options: dip switch setting and software setting;
6. Plug and unplug terminals are easy to use, with screws that are sturdy, safe, and reliable;
7. High reliability, each channel is isolated from each other, the power supply and communication are fully isolated, and the withstand voltage is greater than 2500V.
Technical Specification

Factory default communication parameters: Address 1, 9600 baud rate, no checksum, 8 data points, 1 stop bit.

Applications

1.Solar PV Generation Monitoring

Bipolar measurement captures DC output from solar arrays; bidirectional energy metering tracks self-consumption vs. grid feed-in.

2.Battery Energy Storage Systems (BESS)

Measures charge/discharge current and accumulated ampere-hours (Ah) for battery state-of-charge monitoring.

3.Industrial DC Power Monitoring

Full parameter acquisition for DC motor drives, electrolysis equipment, and DC distribution panels.

4.Telecom & Data Center Power

Monitor -48V or other DC bus systems with high accuracy and galvanic isolation.

5.Electric Room Monitoring

RS485 Modbus RTU output integrates seamlessly with SCADA, PLC, and building management systems

FAQ
Q1: Can I mix current and voltage inputs on the ZH-40243 module?

A: Yes! The ZH-40243-14F2 model is a mixed acquisition module, allowing you to configure arbitrary combinations of current or voltage inputs across the 24 channels according to your project requirements.

Q2: How can I change the Modbus communication address and baud rate?

A: The module supports two configuration methods: hardware dip switches (default) and software settings via Modbus commands. You can easily switch modes based on your on-site installation needs.

Q3: What is the output data format returned by the module?

A: The module outputs the 24-channel AC current or voltage values where an output value of 10000 corresponds directly to 100% of the rated range value.

Q4: Is the module protected against electrical noise and high voltage surges?

A: Absolutely. The module features complete isolation between channels, power supplies, and communication lines, offering an isolation withstand voltage greater than 2500V DC for high safety and anti-interference performance.