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Taidacent TAIDACENT-8CH-ADQ

Taidacent 8-Channel Analog Input Data Acquisition Module (TAIDACENT-8CH-ADQ) User Manual

1. Overview

The Taidacent 8-Channel Analog Input Data Acquisition Module is designed for industrial applications, providing 8 channels for analog current (0-20mA) and voltage (0-10V, 0-30V) input acquisition. It features 8 NPN switch outputs and supports the Modbus RTU slave station protocol for communication. The module includes an anti-crash hardware watchdog and operates with a 5-35V power supply, incorporating anti-reverse connection, overvoltage, and overcurrent protection. Its 12-bit resolution ADC ensures 0.1% precision. The high-performance 32-bit ARM processor and industrial temperature range make it suitable for harsh environments. Users can configure input ranges via internal jumpers and perform analog calibration using provided software.

Taidacent 8-Channel Analog Input Data Acquisition Module, front view
Figure 1: Front view of the Taidacent 8-Channel Analog Input Data Acquisition Module.

2. Key Features

  • 8-channel analog current input (0-20mA)
  • 8-channel analog voltage input (0-10V, 0-30V)
  • Support for 8 NPN switch outputs
  • 12-bit resolution, 0.1% precision Analog-to-Digital Converter (ADC)
  • High-performance 32-bit ARM processor
  • Modbus RTU slave station protocol support
  • 5-35V DC power supply with anti-reverse connection, overvoltage, and overcurrent protection
  • Anti-crash hardware watchdog
  • Analog calibration function
  • Internal integrated range switching jumper device for voltage/current acquisition
  • 12 indicator lights for status monitoring
  • Industrial temperature range operation
  • Custom linear analog data conversion

3. Specifications

ParameterValue
Product Dimensions3.94 x 3.94 x 1.57 inches
Item Weight5.4 ounces
Model NumberTAIDACENT-8CH-ADQ
Power Supply5-35V DC
Analog Input Channels8
Analog Input Ranges0-10V, 0-30V, 0-20mA (configurable)
Digital Output Channels8 (NPN switch output)
Resolution12-bit
Precision0.1%
Communication InterfaceRS485
ProtocolModbus RTU
Operating TemperatureIndustrial grade

4. Terminal Structure and Indicators

The module features clearly labeled terminals for power, analog inputs, RS485 communication, and digital outputs, along with status indicator lights.

Diagram showing terminal connections for VCC, GND, A+, B-, AI1-AI8, and OUT1-OUT8
Figure 2: Terminal layout and digital output connections.

4.1. Terminal Descriptions

  • VDC: Positive power supply terminal (5-35V DC)
  • GND: Negative terminal of power supply
  • AI1 - AI8: Analog input terminals 1 through 8
  • A+: RS485 communication line A
  • B-: RS485 communication line B
  • OUT1 - OUT8: Digital output terminals 1 through 8

4.2. Indicator Lights

Diagram showing the location and function of indicator lights on the module
Figure 3: Location of indicator lights.
  • D1 - D8 (Top Lights): Digital Output status indicators.
    • On: Corresponding DO has output.
    • Off: Corresponding DO has no output.
  • PWR (Bottom Light): Power indicator. Always on during normal power supply.
  • SYS (Bottom Light): System status light. Flashes once per second during normal operation.
  • ESYS, GSYS (Bottom Lights): Reserved for future use.

5. Installation and Wiring

5.1. Power Supply Connection

Connect a 5-35V DC power source to the VDC (positive) and GND (negative) terminals. Ensure correct polarity to prevent damage to the module. The module includes anti-reverse connection, overvoltage, and overcurrent protection.

5.2. RS485 Communication Wiring

Connect the RS485 communication lines to the A+ and B- terminals. Ensure proper connection to your Modbus master device.

5.3. Analog Input Wiring

Connect your analog sensors to the AI1-AI8 terminals and GND. Refer to the specific sensor's documentation for wiring details. The module supports both two-wire (passive) and three-wire (active) sensors.

  • Two-wire sensor (passive): Connect the sensor signal pin to an INx terminal and the other sensor terminal to GND.
  • Three-wire sensor (active): Connect the sensor signal pin to an INx terminal, the sensor's power input to VCC/VDC, and the sensor's ground to GND.

5.4. Digital Output Wiring

The 8 digital outputs (OUT1-OUT8) are NPN switch outputs. They can be used to control external relays or other switching devices. When connecting a relay, ensure the maximum load does not exceed 3W.

Schematic for Digital Output to Relay: Connect one side of the relay's coil to VCC/VDC and the other side to an OUTx terminal. The common ground for the relay should be connected to GND.

6. Analog Input Configuration (Jumpers)

The module features internal jumpers to select the desired analog input range for each channel. This allows for flexible configuration between voltage and current acquisition modes.

Diagram illustrating various voltage and current input ranges supported by the module
Figure 4: Supported analog input ranges.
Detailed diagram showing jumper settings for selecting 0-10V, 0-30V, and 0-20mA input ranges
Figure 5: Jumper settings for analog input range selection.

To configure the input range, adjust the jumpers on the circuit board according to the desired range:

  • 0-10V Range: Select 2 jumper holders on the purple side.
  • 0-30V Range: Select 2 jumper holders on the yellow side.
  • 0-20mA Range: Select 1 jumper seat on the green side.

The module also supports 0-5V and 4-20mA ranges, which are typically configured through the same jumper settings or fine-tuned via the configuration software after selecting the base range.

7. Digital Output (DO) Operation

The 8 digital outputs (OUT1-OUT8) can be operated in two primary modes:

  • Independent Control: Each DO output can be controlled individually via Modbus commands from a master device.
  • Linkage Operation: Users can configure