1. Product Overview

2. Main Features

• Integrated hybrid I/O design, compatible with mainstream 4~20mA and 0~10V industrial standard signals

• 16-bit high-resolution ADC and DAC, ensuring high precision and stable analog sampling and output

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

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

• Standard RS485 communication interface, supports Modbus RTU communication protocol

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

• Digital channels support NPN/PNP logic selection and adjustable anti-shake debounce time

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

• Industrial flame-retardant plastic housing, compact size, low power consumption and high reliability

• Standard 35mm DIN rail mounting, easy installation, wiring and daily 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 performed by qualified professional technicians.

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

• Do not install the module in environments with flammable gas, explosive dust, corrosive vapor or conductive particles.

• Keep sufficient ventilation space around the module and do not block heat dissipation gaps.

• Signal cables and power cables shall be laid separately to reduce electromagnetic interference.

• The protective grounding terminal must be connected to reliable earth ground.

• Do not exceed the rated load of each input and output channel to prevent permanent module damage.

• 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 mounting surface.

2. Align the upper buckle of the module with the DIN rail edge.

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

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

5.2 Terminal Pin Assignment

5.3 Wiring Instructions

1. Strip about 6mm insulation from wire ends.

2. Loosen terminal screws with a standard screwdriver.

3. Insert wires into corresponding terminals strictly according to pin definition.

4. Tighten screws moderately to ensure reliable contact; avoid over-tightening damage.

5. Fix cables with cable ties to prevent pulling stress on terminals.

6. Analog signal adopts shielded twisted-pair cable with single-end shield grounding.

7. Digital signal and power wiring use stranded copper wire with suitable wire gauge.

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 Mode

• 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 and convert into standard analog signals to regulate valves, actuators and other execution devices.

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

• Digital Output: Control external relays, solenoid valves and indicator lights according to system commands.

• Communication: Realize data interaction and parameter configuration with upper controller via Modbus RTU protocol.

7.3 Indicator Status

8. Daily Maintenance

• Regularly check indicator working status and terminal tightness; inspect for oxidation and loose contact.

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

• Keep operating environment temperature and humidity within specified range.

• Periodically inspect aging of external cables and replace damaged wires in time.

• Recalibrate parameters timely if analog sampling data is abnormal.

9. Troubleshooting

1. Power indicator not lit

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

   Solution: Check power circuit and wiring polarity, restore normal power supply
2. Communication failure

   Cause: Wrong baud rate or address, RS485 A/B line reversed, missing terminal resistance

   Solution: Unify communication parameters, correct A/B wiring, add matched 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: Improper range setting or load resistance mismatch

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

   Cause: Wrong logic configuration or loose wiring

   Solution: Adjust input logic parameters and fasten wiring
6. Digital output no action

   Cause: Overload current or incorrect logic mode

   Solution: Reduce load within rated range and reconfigure parameters

10. Warranty Terms