1. Product Overview

2. Main Features

• Integrated multi-channel hybrid I/O structure, compatible with common industrial standard signals

• 16-bit high precision resolution for all analog channels

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

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

• Adopts RS485 communication interface, supports Modbus RTU protocol

• Wide operating temperature range, suitable for harsh industrial environments

• Digital channels support logic mode selection and adjustable debounce time

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

• Flame-retardant industrial housing, compact size, standard DIN rail mounting

• Stable long-term operation, low power consumption and high reliability

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 personnel.

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

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

• Keep enough 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 to ensure safety and anti-interference performance.

• Do not exceed the rated load of each input and output channel to avoid 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 35mm standard DIN rail firmly on the mounting base.

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

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

4. Shake the module slightly to confirm it is fixed firmly without sliding.

5.2 Terminal Definition

5.3 Wiring Instructions

1. Strip about 6mm insulation from the wire end.

2. Loosen terminal screws with a standard screwdriver.

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

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

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

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

7. Digital signal uses stranded copper wire with appropriate 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 field sensor analog signals, convert into digital data and upload to the 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 status, upload level change signals in real time.

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

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

7.3 Indicator Description

8. Daily Maintenance

• Regularly check indicator status and terminal tightness, inspect for looseness and oxidation.

• Clean module surface only 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.

• 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 short circuit and overload, 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: Wrong range setting, excessive load resistance or poor contact

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

   Cause: Incorrect logic setting, loose wiring or sensor failure

   Solution: Adjust input logic, check and fasten wiring
6. Digital output no switching

   Cause: Overload current, wrong logic mode or loose terminal

   Solution: Reduce load current, reconfigure logic and tighten terminals
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