1. Product Overview

2. Main Features

• Hybrid I/O Integration: 4AI / 2AO / 8DI / 4DO integrated design

• Analog Signal Compatibility: 4~20mA current / 0~10V voltage, software-selectable

• High Precision: 16-bit ADC/DAC, ±0.1% full-scale accuracy at 25°C, low temperature drift

• Software Configurable: Signal type, engineering range, digital filter, and working mode fully configurable

• Industrial Protection: 1500VDC isolation, overvoltage, overcurrent, short-circuit, and overtemperature protection

• Communication: Standard RS485, Modbus RTU; baud rates 9600/19200/38400bps

• Wide Temperature Range: -25°C ~ +60°C operating temperature

• Digital Channel Flexibility: NPN/PNP logic support, 0~500ms adjustable debounce time

• Fail-Safe Operation: Analog channels with digital filtering and communication-loss fail-safe mode

• Durable Construction: Flame-retardant plastic housing, compact, low power consumption

• Easy Installation: 35mm standard DIN rail mounting, simple wiring and maintenance

3. Technical Specifications

3.1 General Parameters

• Model: 12P1064X08R

• Rated Power Supply: 24VDC ±10%

• Max Working Current: ≤300mA

• Isolation Voltage: 1500VDC (field side to internal circuit)

• Operating Temperature: -25°C ~ +60°C

• Storage Temperature: -40°C ~ +85°C

• Relative Humidity: 5% ~ 95% RH, non-condensing

• Mounting: 35mm standard DIN rail

• Housing Material: Industrial flame-retardant engineering plastic

3.2 Channel Configuration

• Analog Input (AI): 4 channels, 4~20mA / 0~10V software-selectable

• Analog Output (AO): 2 channels, 4~20mA / 0~10V software-selectable

• Digital Input (DI): 8 channels, 24VDC level compatible

• Digital Output (DO): 4 channels, 0.5A rated load per channel

3.3 Analog Performance

• Resolution: 16-bit

• Basic Accuracy: ±0.1% full scale at 25°C

• Temperature Drift: ±0.2% full scale over full temperature range

• AI Input Load: Current ≤250Ω; Voltage ≥100kΩ

• AO Output Load: Current ≤500Ω; Voltage ≥1kΩ

3.4 Communication Parameters

• Interface: RS485

• Protocol: Modbus RTU

• Default Baud Rate: 9600bps

• Data Format: 8 data bits, 1 stop bit, no parity

• Device Address: 1~247 configurable

4. Safety Precautions

1. Installation, wiring, and maintenance must be performed by qualified professional technicians.

2. Disconnect all power before wiring, disassembly, or maintenance to avoid electric shock and module damage.

3. Do not install in flammable, explosive, dusty, or corrosive environments.

4. Maintain adequate ventilation; do not block heat dissipation holes.

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

6. Connect the protective grounding terminal to reliable earth ground.

7. Do not exceed the rated voltage, current, or load of each channel.

8. Do not disassemble or modify the internal circuit without authorization.

5. Installation and Terminal Definition

5.1 DIN Rail Installation

1. Secure a 35mm standard DIN rail firmly on the mounting panel.

2. Hook the module’s upper buckle onto the DIN rail edge.

3. Press downward until the bottom lock clicks into place.

4. Shake gently to confirm firm installation.

5.2 Terminal Pin Assignment

1. 24VDC Positive

2. 24VDC Negative

3. AI1+

4. AI1−

5. AI2+

6. AI2−

7. AI3+

8. AI3−

9. AI4+

10. AI4−

11. AO1+

12. AO1−

13. AO2+

14. AO2−

15. DI Common

16. DI1

17. DI2

18. DI3

19. DI4

20. DI5

21. DI6

22. DI7

23. DI8

24. DO1

25. DO2

26. DO3

27. DO4

28. DO Common

29. Protective Ground (PE)

5.3 Wiring Instructions

1. Strip 6mm of insulation from wire ends.

2. Loosen terminal screws, insert wires into corresponding terminals.

3. Tighten screws moderately to ensure good contact (avoid over-tightening).

4. Analog signals: Use shielded twisted-pair cable with single-end grounding.

5. Power/digital signals: Use stranded copper wire of appropriate gauge.

6. Secure cables with ties to avoid tension on terminals.

6. Parameter Configuration

6.1 Connection Method

6.2 Configurable Parameters

• Analog Input: Signal type, custom engineering range, digital filter adjustment

• Analog Output: Signal type, output calibration, fail-safe mode (fixed/hold)

• Digital Input: NPN/PNP logic, debounce time (0~500ms)

• Digital Output: Output logic, communication-loss fail-safe ON/OFF, pulse output settings

• Communication: Baud rate, Modbus address, restore factory defaults

6.3 Save and Activation

7. Operation Description

7.1 Power-On Self-Test

7.2 Main Functions

• Analog Input: Collect sensor signals, convert to digital data, and upload to the control system.

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

• Digital Input: Detect switch/sensor on/off status and upload state changes.

• Digital Output: Control external relays, solenoid valves, and indicators.

• Communication: Exchange data and configure parameters with the host/PLC via Modbus RTU.

7.3 Indicator Status

• Power LED Steady Green: Power normal

• Power LED Off: No power or fault

• Status LED Green Flashing: Normal operation/communication

• Status LED Red Flashing: Overload, short circuit, or communication error

• Status LED Steady Red: Hardware failure (replace module)

8. Daily Maintenance

1. Regularly check terminal tightness to prevent oxidation/loose contacts.

2. Clean dust with a dry soft cloth only (no liquid/chemical solvents).

3. Maintain operating temperature/humidity within specified ranges.

4. Replace aging/damaged cables promptly.

5. Recalibrate channels if sampling data is unstable/inaccurate.

9. Troubleshooting

1. Power Indicator Off

   • Cause: No 24VDC, reversed polarity, or broken wire

   • Solution: Check wiring and correct polarity

2. Communication Failure

   • Cause: Baud rate/address mismatch, RS485 A/B reversed, missing 120Ω terminal resistor

   • Solution: Unify parameters, adjust wiring, add terminal resistor

3. Analog Input Unstable

   • Cause: Loose terminals, wrong signal range, or EMI

   • Solution: Fasten wiring, confirm signal type, use shielded cable/grounding

4. Analog Output Inaccurate

   • Cause: Range error or load resistance mismatch

   • Solution: Recalibrate range and match load parameters

5. Digital Input No Response

   • Cause: Loose wiring or logic setting error

   • Solution: Check wiring and adjust NPN/PNP logic

6. Digital Output No Action

   • Cause: Overload or incorrect logic mode

   • Solution: Reduce load to rated range and reconfigure

10. Warranty Statement