1. Product Overview

2. Main Features

• All-in-one hybrid I/O: 4AI / 2AO / 8DI / 4DO integrated design

• Compatible with standard industrial signals: 4~20mA current and 0~10V voltage

• 16-bit high-resolution ADC and DAC, ensuring high precision and low temperature drift

• Full software configurable for signal type, engineering range, digital filter and working mode

• Built-in 1500VDC isolation, overvoltage, overcurrent, short-circuit and overtemperature protection

• Standard RS485 communication interface, supports Modbus RTU protocol

• Optional baud rate: 9600bps, 19200bps, 38400bps

• Wide operating temperature: -25℃ ~ +60℃

• Digital channels support NPN/PNP logic and 0~500ms adjustable debounce time

• Analog channels support digital filtering and fail-safe mode under communication loss

• Industrial flame-retardant plastic housing, compact structure and low power consumption

• Standard 35mm DIN rail mounting, easy installation, wiring and maintenance

3. Technical Specifications

3.1 General Parameters

3.2 Channel Configuration

3.3 Analog Performance

3.4 Communication Parameters

4. Safety Precautions

1. Installation, wiring and maintenance must be performed by qualified professional technicians.

2. Disconnect all power supply before wiring, disassembly or maintenance to avoid electric shock and module damage.

3. Do not install the module in flammable, explosive, dusty or strong corrosive gas environments.

4. Keep sufficient ventilation space around the module; do not block heat dissipation holes.

5. Separate power cables and signal cables during wiring to reduce electromagnetic interference.

6. Connect the protective grounding terminal to reliable earth ground.

7. Do not exceed the rated voltage, current and load range of each channel.

8. Do not disassemble, modify or refit the internal structure of the module without authorization.

5. Installation and Terminal Definition

5.1 DIN Rail Installation

1. Fix the standard 35mm DIN rail firmly on the installation panel.

2. Hook the upper buckle of the module onto the DIN rail edge.

3. Press the module downward until the bottom lock clicks and fastens tightly.

4. Slightly shake the module to confirm firm installation without loosening.

5.2 Terminal Pin Assignment

5.3 Wiring Instructions

1. Strip about 6mm insulation from wire ends.

2. Loosen terminal screws, insert wires into corresponding terminals.

3. Tighten screws moderately to ensure good contact, avoid over-tightening.

4. Analog signal cables use shielded twisted-pair wire with single-end shielding grounding.

5. Power and digital signals use stranded copper wire with suitable gauge.

6. Fix cables with ties to avoid pulling force on terminals.

6. Parameter Configuration

6.1 Connection Method

6.2 Configurable Parameters

Analog Input

Analog Output

Digital Input

Digital Output

Communication Settings

6.3 Save and Activation

7. Operation Description

7.1 Power-on Self-test

7.2 Main Functions

• Analog Input: Collect analog signals from field sensors, convert into digital data and upload to control system in real time.

• Analog Output: Receive control commands, convert into standard analog signals to drive regulating valves and actuators.

• Digital Input: Detect on-off status of switches and sensors, upload status change signals.

• Digital Output: Control external relays, solenoid valves and indicator lights.

• Communication: Realize data exchange and remote parameter configuration with upper computer or PLC via Modbus RTU.

7.3 Indicator Status Description

8. Daily Maintenance

1. Regularly check terminal wiring tightness to prevent oxidation and loose contact.

2. Clean module surface dust only with dry soft cloth; do not use liquid or chemical solvents.

3. Keep working temperature and humidity within the specified range.

4. Inspect cables regularly, replace aging or damaged wires in time.

5. Recalibrate channel parameters if sampling data is unstable or inaccurate.

9. Troubleshooting

1. Power indicator not lit

   Cause: No 24VDC input, power polarity reversed or wire broken

   Solution: Check power wiring and correct polarity
2. Communication failure

   Cause: Baud rate/address mismatch, RS485 A/B line reversed, missing terminal resistance

   Solution: Unify communication parameters, adjust A/B wiring, add 120Ω matching terminal resistor
3. Analog input data unstable

   Cause: Loose terminals, incorrect signal range or strong electromagnetic interference

   Solution: Fasten wiring, confirm signal type, use shielded cable and reliable grounding
4. Analog output inaccurate

   Cause: Range setting error or load resistance mismatch

   Solution: Reset engineering range and match load parameters
5. Digital input no response

   Cause: Loose wiring or logic setting error

   Solution: Check wiring and adjust NPN/PNP logic
6. Digital output no action

   Cause: Overload current or incorrect logic mode

   Solution: Reduce load within rated range and reconfigure parameters

10. Warranty Statement