1. Product Overview

2. Main Features

• All-in-one hybrid I/O design, compatible with standard 4~20mA and 0~10V industrial signals

• 16-bit high-resolution ADC/DAC ensures accurate and stable analog sampling and output

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

• Built-in isolation, overvoltage, overcurrent, short-circuit and over-temperature protection

• Standard RS485 communication interface, supports Modbus RTU protocol

• Wide operating temperature range, adapts to complex industrial electromagnetic environment

• Digital channels support NPN/PNP logic and adjustable debounce time

• Analog channels support digital filtering and user-defined fail-safe mode during communication loss

• Flame-retardant engineering plastic housing, compact size and low power consumption

• Standard 35mm DIN rail installation, easy mounting, 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

• Installation, wiring and maintenance must be completed by qualified professional technicians.

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

• Do not install in environments with flammable gas, explosive dust or strong corrosive vapor.

• Keep ventilation unobstructed and do not block heat dissipation gaps.

• Separate power cables and signal cables to reduce electromagnetic interference.

• Connect the protective grounding terminal to reliable earth ground.

• Do not exceed the rated load of each channel to avoid permanent damage.

• Do not disassemble or modify 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 mounting surface.

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

3. Press the module down until the bottom lock snaps into place.

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 wires use shielded twisted-pair cable with single-end grounding.

5. Use stranded copper wire for power and digital signal wiring.

6. Fix cables with ties to prevent 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 Working Function

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

• Analog Output: Receive control commands and output standard analog signals to adjust 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 parameter setting with upper computer or PLC via Modbus RTU.

7.3 Indicator Status

8. Daily Maintenance

• Regularly check terminal wiring tightness and prevent oxidation and loose contact.

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

• Keep working temperature and humidity within the specified range.

• Periodically check cable aging and replace damaged wires in time.

• Recalibrate parameters if sampling data is abnormal.

9. Troubleshooting

1. Power indicator not on

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

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

   Cause: Mismatched baud rate/address, RS485 A/B reversed, missing terminal resistance

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

   Cause: Loose wiring, wrong signal range or strong site interference

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

   Cause: Improper range setting or load resistance mismatch

   Solution: Recalibrate output range and match load parameters
5. Digital input no response

   Cause: Loose wiring or logic setting error

   Solution: Check wiring and adjust input logic
6. Digital output no action

   Cause: Overload current or wrong logic mode

   Solution: Reduce load within rated range and reconfigure parameters

10. Warranty Terms