Product Details

1 Product Overview

The DAQ-GP-A/DCT/VT series AC/DC current and voltage sensors are one-in-one-out industrial-grade signal transmitters produced by Shanghai DAQ IoT Technology Co., Ltd., used for real-time measurement of current and voltage in AC/DC circuits. The product uses high-precision ultra-microcrystalline iron-core coils and industrial-grade chips, with true RMS measurement, featuring high accuracy, good stability and strong anti-interference capability. It can convert AC/DC electrical parameters into standard analog outputs such as DC420mA, DC05V, DC0~10V, or RS485 digital output, compatible with various PLCs, touch screens, DCS and industrial acquisition devices. It is widely used in electric power, communications, environmental protection, computer room monitoring, industrial measurement, distribution monitoring and other fields.

3 Functional Features

• Supports three input modes: through-hole current input, terminal current input and terminal voltage input

• True RMS measurement with high accuracy, good linearity and low temperature drift

• Three-terminal electrical isolation of input/output/power supply, strong anti-interference

• Wide-range AC/DC power supply, adapting to various on-site power sources

• Standard 35mm DIN-rail mounting, easy to install and simple to maintain

• Optional outputs: DC420mA, 020mA, 05V, 010V, RS485

• Industrial-grade wide-temperature design, stable and reliable over the long term

• Supports customization of input range, output signal and supply voltage

• Strong overload capacity, meeting harsh industrial on-site environments

4 Main Technical Parameters

Parameter	Specification
Input type	Through-hole current input (within 150A); terminal current input (within 20A); terminal voltage input (within 1500V)
Input range	A/DC 010A, A/DC 0300V (customizable)
Output signal	DC420mA, DC020mA, DC05V, DC010V, RS485
Accuracy class	0.2% F.S
Response time	≤200mS
Isolation withstand voltage	3KV/50Hz, 2mA, 1Min
Temperature drift	0.02% F.S./℃
Bandwidth	40~5000Hz
Load capacity	500Ω (DC420mA); 1000Ω (DC05V)
Rated power consumption	0.7W (420mA/RS485); 0.25W (05V)
Overload capacity	2× nominal input for 1s; 10× nominal input (through-hole type) for 10s
Operating temperature	-20℃~80℃
Storage temperature	-25℃~85℃
Installation	35mm standard DIN-rail mounting
Through-hole diameter	φ8mm, φ12mm (T4I only)
Power supply	DC24V/DC12V/±12V/±15V; AC85275V/DC100370V

5 Interface Description & Installation

5.1 Terminal Definition

• P+: power positive

• GND: power negative / common ground

• OUT+/OUT-: analog output positive/negative

• A: RS485A (RS485 models only)

• B: RS485B (RS485 models only)

• NC: no connection, leave floating

5.2 Wiring Notes

• Terminal input: connect the measured AC/DC voltage/current to both ends of IN

• Through-hole input: pass the measured cable directly through the center hole of the transmitter

• RS485 communication: the A and B wires must never be reversed, and addresses of multiple devices connected in parallel must not conflict

• The NC pin must always be left floating and never connected

5.3 Installation

• Standard 35mm DIN-rail clip mounting

• Installation environment: no strong corrosion, no severe vibration, good ventilation

• For the through-hole type, keep the cable straight and avoid squeezing or bending

6 Outline Dimension Drawing

7 Wiring Diagrams

7.1 AC/DC Voltage Terminal Input Wiring Diagram

7.2 AC/DC Current Through-Hole Input Wiring Diagram