1. Product Overview

2. Main Features

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

• 16-bit high precision for all analog input and output channels

• Full software configuration for signal type, range and working parameters

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

• Equipped with RS485 interface, supports Modbus RTU communication protocol

• Wide operating temperature range, adaptable to harsh industrial environments

• Digital channels support logic selection and adjustable debounce time

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

• Flame-retardant plastic housing, compact structure, low power consumption

• High stability and long service life for continuous industrial operation

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 operated by qualified professional personnel.

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

• Do not install the module in flammable, explosive, corrosive gas or heavy dust environment.

• 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.

• 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 35 mm 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 position.

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

5.2 Terminal Definition

5.3 Wiring Steps

1. Strip about 6 mm insulation from wire ends.

2. Loosen terminal screws with a screwdriver.

3. Insert wires into corresponding terminals strictly according to definitions.

4. Tighten screws moderately to ensure reliable contact.

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

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

7. Digital signal adopts stranded copper wire with suitable wire gauge.

6. Parameter Configuration

6.1 Connection

6.2 Configurable Items

Analog Input

Analog Output

Digital Input

Digital Output

Communication

6.3 Save and Activate

7. Operation Instruction

7.1 Power-on Self-test

7.2 Working Description

• Analog Input: Collect field sensor analog signals and upload converted digital data to control system.

• Analog Output: Receive control commands and output standard analog signals to drive valves and actuators.

• Digital Input: Detect switch and sensor on-off status, upload signal changes in real time.

• Digital Output: Control external relays, solenoid valves and indicators to switch on and off.

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

7.3 Indicator Status

8. Daily Maintenance

• Regularly check indicator status and terminal tightness.

• Clean module surface with dry soft cloth only, no liquid solvent allowed.

• Keep ambient temperature and humidity within specified range.

• Inspect external cables regularly and replace aging wires in time.

• Replace faulty module with the same model and reconfigure parameters.

9. Troubleshooting

1. Power indicator off

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

   Solution: Check power supply and wiring polarity
2. Status indicator red flashing

   Cause: Output overload, short circuit or self-test abnormality

   Solution: Disconnect load, eliminate fault and restart power
3. Analog input data abnormal

   Cause: Wrong signal type, loose terminal or unmatched load resistance

   Solution: Reconfigure parameters and fasten wiring
4. Analog output inaccurate

   Cause: Improper range setting or over load resistance

   Solution: Reset range and control load within rated value
5. Digital input no response

   Cause: Wrong logic setting or loose wiring

   Solution: Adjust logic mode and check terminals
6. Digital output no switching

   Cause: Overload current or incorrect logic

   Solution: Reduce load and reconfigure parameters
7. RS485 communication failure

   Cause: Mismatched baud rate/address, A/B line reversed

   Solution: Unify communication parameters and correct wiring