1. Product Overview

2. Main Features

• Integrated hybrid I/O design, compatible with mainstream industrial signals

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

• Fully software configurable channel type, range and working mode

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

• Support Modbus RTU communication protocol via RS485 interface

• Wide operating temperature for harsh industrial environment

• Digital channels support logic selection and debounce configuration

• Analog channels support digital filtering and fail-safe output setting

• Compact structure, standard DIN rail installation, easy wiring and layout

3. Technical Specifications

3.1 General Specifications

3.2 Channel Resource Configuration

3.3 Analog Performance Parameters

3.4 Communication Parameters

4. Safety Precautions

• Installation, wiring and maintenance shall only be performed by qualified professional technical personnel.

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

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

• Reserve sufficient ventilation space around the module, do not block heat dissipation gaps.

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

• The protective grounding terminal must be connected to reliable earth ground for safety and anti-interference performance.

• Do not exceed the rated load of each input and output channel to avoid 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 Steps

1. Fix the standard 35mm DIN rail firmly on the installation base.

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

3. Press the module downward until the bottom lock snaps tightly onto the rail.

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

5.2 Terminal Pin Definition

5.3 Wiring Operation

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

2. Loosen terminal screws with a standard screwdriver.

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

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

5. Fix cables with cable ties to prevent terminal stress from external pulling.

6. Analog signal wiring uses shielded twisted pair cable, single-end grounding for shielding layer.

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

6. Parameter Configuration

6.1 Connection Method

6.2 Configurable Items

Analog Input

Analog Output

Digital Input

Digital Output

Communication Settings

6.3 Configuration Saving

7. Working Principle and Operation

7.1 Power-on Self-test

7.2 Normal Working Mode

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

• Analog Output: Receive control commands from the main controller, convert to standard analog signals to regulate valves, actuators and other field equipment.

• Digital Input: Detect switch, proximity sensor and relay status, upload level change information in real time.

• Digital Output: Switch ON/OFF according to system commands to control external relays, solenoid valves and indicator lamps.

• Communication: Realize data interaction, parameter reading and writing through Modbus RTU protocol.

7.3 Indicator Status Description

8. Daily Maintenance

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

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

• Keep ambient temperature and humidity within specified range.

• Periodically inspect external cable aging, replace damaged wires in time.

• Abnormal working module shall be replaced with the same model and reconfigured.

9. Troubleshooting

1. Power indicator off

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

   Solution: Check power supply line and wiring polarity, restore normal power input
2. Status indicator red flashing

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

   Solution: Disconnect field load for inspection, eliminate short circuit and overload, restart module power
3. Analog input data abnormal

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

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

   Cause: Improper range setting, excessive load resistance or poor contact

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

   Cause: Wrong logic configuration, loose wiring or sensor abnormality

   Solution: Adjust input logic parameters, check and fasten wiring
6. Digital output cannot switch

   Cause: Overload current, incorrect logic mode or loose terminal

   Solution: Reduce load current to rated range, reconfigure logic and fasten terminals
7. RS485 communication failure

   Cause: Mismatched baud rate or address, A/B line reversed, no terminal resistance

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

10. Warranty Provisions