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12P0681X072

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12P0681X072
May 12, 2026

12P0681X072

12P0681X072 is a high-performance industrial integrated I/O module, designed for industrial automation, PLC expansion, process control, environmental monitoring and mechanical control systems. This module integrates analog input, analog output, digital input and digital output in one compact DIN rail mounting housing. Adopting industrial isolation circuit design and comprehensive protection circuit, it supports 16-bit high precision signal sampling and conversion. With built-in RS485 communication interface and Modbus RTU protocol, it realizes remote parameter configuration, real-time data collection and equipment status monitoring. It features strong anti-interference ability, low power consumption and long-term stable operation, suitable for harsh industrial working conditions.

Description

1. Product Overview

12P0681X072 is a high-performance industrial integrated I/O module, designed for industrial automation, PLC expansion, process control, environmental monitoring and mechanical control systems.
This module integrates analog input, analog output, digital input and digital output in one compact DIN rail mounting housing. Adopting industrial isolation circuit design and comprehensive protection circuit, it supports 16-bit high precision signal sampling and conversion. With built-in RS485 communication interface and Modbus RTU protocol, it realizes remote parameter configuration, real-time data collection and equipment status monitoring. It features strong anti-interference ability, low power consumption and long-term stable operation, suitable for harsh industrial working conditions.

2. Main Features

  1. Integrated hybrid I/O: analog input, analog output, digital input and digital output combined in one module.

  2. Support standard industrial signals: 4~20mA current and 0~10V voltage.

  3. 16-bit high resolution ADC/DAC, high acquisition accuracy and low temperature drift.

  4. Full software configurable: signal type, engineering range, digital filter and operation mode.

  5. Built-in 1500VDC isolation, overvoltage, overcurrent, short circuit and over temperature protection.

  6. Standard RS485 interface, support Modbus RTU communication protocol.

  7. Optional baud rate: 9600bps, 19200bps, 38400bps.

  8. Wide working temperature: -25℃ ~ +60℃.

  9. Digital channels support NPN/PNP logic and 0~500ms adjustable debounce time.

  10. Analog channels support digital filtering and fail-safe mode when communication is lost.

  11. Flame-retardant plastic housing, compact structure, standard 35mm DIN rail installation.

3. Technical Specifications

3.1 General Parameters

Model: 12P0681X072
Working Power: 24VDC ±10%
Max Working Current: ≤300mA
Isolation Voltage: 1500VDC (field side to internal circuit)
Operating Temperature: -25℃ ~ +60℃
Storage Temperature: -40℃ ~ +85℃
Relative Humidity: 5% ~ 95% RH, non-condensing
Mounting Type: 35mm standard DIN rail
Housing Material: Industrial flame-retardant engineering plastic

3.2 Channel Resource

Analog Input: 4 channels, 4~20mA / 0~10V software selectable
Analog Output: 2 channels, 4~20mA / 0~10V software selectable
Digital Input: 8 channels, 24VDC level compatible
Digital Output: 4 channels, single channel rated load 0.5A

3.3 Analog Performance

Resolution: 16-bit
Basic Accuracy: ±0.1% Full Scale (at 25℃)
Temperature Drift: ±0.2% Full Scale within working temperature range
Analog Input Impedance: Current type ≤250Ω; Voltage type ≥100kΩ
Analog Output Load: Current type ≤500Ω; Voltage type ≥1kΩ

3.4 Communication Parameters

Communication Interface: RS485
Communication 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 completed by qualified professional technicians.

  2. Cut off power supply before wiring, disassembly or maintenance to avoid electric shock and module damage.

  3. Do not install the module in flammable, explosive or strong corrosive gas environment.

  4. Keep good ventilation around the module, do not block heat dissipation openings.

  5. Power cables and signal cables shall be laid separately to reduce electromagnetic interference.

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

  7. Do not input voltage or current beyond rated range to avoid permanent module damage.

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

5. Installation and Terminal Definition

5.1 DIN Rail Installation

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

  2. Hang the upper buckle of the module on the DIN rail edge.

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

  4. Shake the module slightly to confirm firm installation without looseness.

5.2 Terminal Pin Definition

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

5.3 Wiring Instructions

  1. Strip about 6mm insulation layer at wire ends.

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

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

  4. Analog signal wires adopt shielded twisted-pair cable with single-end grounding.

  5. Power and digital signal use stranded copper wire with suitable wire gauge.

  6. Use cable ties to fix wiring and prevent pulling force on terminals.

6. Parameter Configuration

6.1 Connection Method

Connect module RS485 port to PC via USB-to-RS485 adapter, use supporting configuration software to scan and connect the module.

6.2 Configurable Items

Analog Input: Signal type selection, custom range setting, digital filter adjustment
Analog Output: Signal type selection, output calibration, fail-safe mode setting
Digital Input: NPN/PNP logic setting, debounce time 0~500ms adjustable
Digital Output: Output logic setting, communication loss fail-safe ON/OFF, pulse output parameter
Communication: Baud rate setting, Modbus address modification, restore factory default

6.3 Save and Activation

Save all configured parameters to the module, then power cycle the module to make settings take effect.

7. Working Principle and Operation Description

7.1 Power-on Self-test

After 24VDC power is supplied, the module completes internal self-diagnosis within 2 seconds. If no fault is detected, it enters normal working state automatically.

7.2 Function Description

Analog Input: Collect field sensor analog signals, convert to digital data and upload to control system in real time.
Analog Output: Receive control commands, convert to standard analog signals to drive valves and actuators.
Digital Input: Detect on-off state of switches and sensors, upload status change signal.
Digital Output: Control external relays, solenoid valves and indicator lights.
Communication: Realize data interaction and remote parameter setting with upper computer or PLC via Modbus RTU.

7.3 Indicator Description

Power LED Steady Green: Power supply normal
Power LED Off: No power or power fault
Status LED Green Flashing: Normal running and communication
Status LED Red Flashing: Overload, short circuit or communication abnormal
Status LED Steady Red: Hardware failure, need module replacement

8. Daily Maintenance

  1. Regularly check terminal wiring tightness to avoid oxidation and loose contact.

  2. Clean module surface dust with dry soft cloth, do not use liquid or chemical solvent.

  3. Keep working temperature and humidity within specified range.

  4. Regularly check cable aging condition and replace damaged wires in time.

  5. Recalibrate channel parameters if sampling data is abnormal.

9. Troubleshooting

  1. No power indicator
    Cause: No 24VDC input, power reverse polarity or broken wire
    Solution: Check power wiring and correct polarity
  2. Communication failure
    Cause: Baud rate or address mismatch, RS485 A/B reverse, lack of terminal resistance
    Solution: Unify communication parameters, adjust A/B wiring, add 120Ω terminal resistor
  3. Analog input data unstable
    Cause: Loose wiring, wrong signal type or strong electromagnetic interference
    Solution: Fasten terminals, confirm signal range, use shielded cable and reliable grounding
  4. Analog output inaccurate
    Cause: Range setting error or load resistance mismatch
    Solution: Recalibrate output 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 current or wrong logic mode
    Solution: Reduce load within rated value and reconfigure parameters

10. Warranty Statement

This module enjoys limited warranty against manufacturing and material defects. Damage caused by improper installation, over-load operation, lightning surge, unauthorized disassembly and operation beyond environmental specifications is not covered by warranty.


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