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 resolution for all analog input and output channels

• Full software configurable for signal type, engineering range and working parameters

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

• RS485 communication interface, supports standard Modbus RTU communication protocol

• Wide operating temperature range, suitable for harsh industrial field environments

• Digital channels support logic mode selection and adjustable debounce time

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

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

• High stability and long service life for long-term 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 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 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 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 place.

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

5.2 Terminal Pin Assignment

5.3 Wiring Instructions

1. Strip about 6 mm 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.

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 uses 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 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, inspect for oxidation and looseness.

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

• Keep operating temperature and humidity within specified range.

• Periodically check cable aging and replace damaged 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 line and wiring polarity, restore normal power supply
2. Status indicator red flashing

   Cause: Output overload, short circuit, self-test failure or communication interruption

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

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

   Solution: Reconfigure channel type, fasten terminals and match load parameters
4. Analog output inaccurate

   Cause: Improper range setting or excessive load resistance

   Solution: Reset engineering range, keep load within rated specification
5. Digital input no response

   Cause: Wrong logic setting or loose wiring

   Solution: Adjust input logic and check terminals
6. Digital output cannot switch

   Cause: Overload current or incorrect logic

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

   Cause: Mismatched baud rate or address, A/B line reversed, missing terminal resistor

   Solution: Unify communication parameters, correct wiring, add matching terminal resistor

10. Warranty Terms