OMRON CJ1W-AD081-V1 8-Channel Analog Input Module

CJ1W-AD081-V1

1. CJ1W: Special I/O module series base for CJ1-series PLCs
2. 広告: アナログ入力
3. 08: 8 アナログ入力チャンネル
4. 1: Standard hardware revision
5. V1: Upgraded functional version (supports wire break detection, dual resolution switching, and digital smoothing filter)

Derivative Model: CJ1W-AD081-V1-SL (spring screwless terminal type)

2. コアハードウェア仕様

基本パラメータ

Input Signal Ranges (Hardware DIP switch selectable per channel)

電圧入力 (DIP Switch = OFF)

-10～+10V, 0～10V, 0～5V, 1～5V

Input Impedance: ≧1MΩ, Maximum Withstand Voltage: ±15V

電流入力 (DIP Switch = ON, built-in 250Ω sampling resistor)

4～20mA, 0～20mA

Input Impedance: 250おお, Maximum Withstand Current: ±30mA

Conversion Accuracy & 解決

1. Two software-selectable resolution grades

4000-count (12-少し): Economical mode with fast conversion speed

8000-count (13-少し): High-precision mode for precise flow/pressure measurement

2. Full-scale Accuracy (周囲温度: 25℃)

電圧入力: ±0.2%FS

電流入力: ±0.4% FS

3. Full-temperature Range Accuracy (0~55°C)

電圧信号: ±0.4% FS

電流信号: ±0.6% FS

4. 変換速度: 1チャネルあたりのミリ秒; full scan of 8 channels takes 8ms; high-speed mode: 250チャネルあたりのμs
5. Built-in Core Functions
6. Wire Break Detection (Dedicated for 4~20mA Circuits)

When a current loop is open, the corresponding channel wire break flag turns ON for program-based alarming.

2. Digital Smoothing Filter

Average value calculation to suppress sensor jitter and on-site electromagnetic interference.

3. Peak / Valley Hold

Captures and locks the maximum and minimum analog values within a cycle, suitable for impact pressure and instantaneous flow acquisition.

4. Offset / Gain Calibration

Onboard calibration registers allow on-site correction of sensor zero drift.

5. Custom Range Scaling

Upper and lower limits of ±32000 can be configured to directly map 4–20mA signals to engineering values such as 0~1000 or 0~5000.

4. Terminal Wiring Definition (18-Pin Terminal Block)

Each channel occupies two terminals: V+ (シグナルポジティブ), COM (Common Negative)

CH1: Pin1(V+), Pin2(COM)

CH2: Pin3(V+), Pin4(COM)

CH3: Pin5(V+), Pin6(COM)

CH4: Pin7(V+), Pin8(COM)

CH5: Pin9(V+), Pin10(COM)

CH6: Pin11(V+), Pin12(COM)

CH7: Pin13(V+), Pin14(COM)

CH8: Pin15(V+), Pin16(COM)

Pin17, Pin18: Shield grounding terminals (Connect all sensor shield cables here for anti-interference performance)

配線ガイドライン

1. Voltage signals: Connect only V+ and COM; set DIP switch to OFF
2. 2-wire 4~20mA transmitters: Connect V+ to transmitter positive terminal, COM to 24V negative terminal; set DIP switch to ON
3. It is recommended to common the COM terminals of multiple sensors. Connect shield layers to pins 17/18 of the module at one end only; double-end grounding is prohibited.
4. PLC Memory Allocation (Special I/O Unit)
5. Input Relay Area (10 Words): Stores raw A/D conversion values for 8 チャンネル

CH1: Channel Word 0; CH2: Channel Word 1 … CH8: Channel Word 7

2. Output Relay Area (10 Words): Function setting registers

Includes resolution switching, filter sampling count, wire break detection enable, upper/lower scaling limit parameters

3. 設定ソフトウェア: CX-Programmer + CX-Integrator. Channel addresses are automatically assigned after registering the module in the I/O table.
4. Typical Industrial Application Scenarios
5. Fluid Control: Acquisition of 4–20mA transmitters for pressure, liquid level and flow
6. Temperature Control Systems: 0～10V / 1~5V temperature transmitter modules
7. Analog Feedback for Inverters & サーボドライブ: Collection of 0~10V speed and torque feedback signals
8. Centralized multi-point analog signal acquisition for water treatment, chemical and packaging machinery
9. 同じシリーズの比較 & 代替ソリューション

Comparison of Analog Input Modules in the Same Series

アップグレード & Compatible Replacements

1. Direct drop-in replacement on the same platform: CJ1W-AD081-V1-SL (スプリング端子, identical hardware parameters; no program modification required)
2. CJ2 Series Compatibility: Direct mounting on CJ2M/CJ2H CPUs with unchanged I/O configuration
3. Replacement for legacy CS Series: CS1W-AD081-V1 (Backplanes are incompatible; CPU rack replacement is mandatory)
4. New-generation NX Series Alternative (Recommended for new projects): NX-AD4208 (8-チャンネルアナログ入力, EtherCAT bus)
5. 一般的な障害のトラブルシューティング マトリックス

9. 使用制限 (Strictly Forbidden Operations)
10. Do not set DIP switches of voltage-input channels to current mode; this will burn the internal sampling resistor of the module
11. Never apply input signals exceeding ±15V (voltage mode) or ±30mA (current mode); A/D chips may suffer permanent breakdown
12. Avoid parallel routing of analog signal cables with power cables for inverters and contactors in the same cable trunking; severe electromagnetic interference will cause data distortion
13. Double-end grounding of transmitter shield layers is prohibited, as circulating current will introduce power-frequency interference
14. Power off the entire PLC system before plugging/unplugging modules; hot swapping will damage backplane bus interfaces

Official Accuracy Specifications of CJ1W-AD081-V1 (Per OMRON Manual Standards)

1. Nominal Accuracy at Room Temperature (23±2°C / 25℃, Full-Scale Error)
2. 電圧入力 (0～5V / 0～10V / -10～+10V / 1～5V)

Overall Accuracy: ±0.2%FS

2. 電流入力 (4～20mA / 0～20mA)

Overall Accuracy: ±0.4% FS

> 注記: FS = Full Scale, referring to relative error across the entire signal range, including integrated zero-point, gain and linearity errors.

2. Full-Temperature Range Accuracy (0～55°C Operating Temperature)

Voltage Signals: ±0.4% FS

Current Signals: ±0.6% FS

3. 解決 (Distinction Between “正確さ” そして “解決”)

Resolution refers to the minimum detectable signal change and is not equivalent to accuracy:

1. Low-speed mode (1チャネルあたりのミリ秒): 1/4000 (12-少し)
2. 高速モード (250チャネルあたりのμs): 1/8000 (13-少し)

Error Calculation Examples

Calculation based on 4~20mA (full span = 16mA) with current accuracy ±0.4%FS:

Maximum Absolute Error = 16mA × 0.4% = ±0.064mA

Calculation based on 0~10V voltage with accuracy ±0.2%FS:

Maximum Absolute Error = 10V × 0.2% = ±0.02V

4. Supplementary Remarks
5. Factory default calibration is optimized for voltage signals. For 4–20mA current loop applications, perform offset/gain calibration via software to further reduce current measurement errors.
6. No galvanic isolation exists between channels. Additional measurement errors may be introduced by multi-sensor common-ground wiring, long cables or heavy electromagnetic interference; such errors are not included in the module’s nominal accuracy rating.
7. The specified accuracy excludes external error sources such as sensor intrinsic error, cable voltage drop and grounding interference.

Full Application Scenarios of CJ1W-AD081-V1 (Classified by Industry, Equipment and Collected Signals)

This is a general-purpose 8-channel analog acquisition module compatible with 4~20mA / 0～10V / 1~5V signals, equipped with wire break detection, digital filtering and peak hold functions. It supports CJ1H/CJ1M/CJ2M/CJ2H CPUs and is ideal for multi-point continuous physical quantity collection, closed-loop process control and equipment condition monitoring. No isolation between channels, making it suitable for sensor networks sharing a common ground at the same location.

1. 化学薬品 / 水処理 / 環境保護 (Most Common Application Field)

Collected Signals

Mainly 4~20mA 2-wire transmitters: liquid level, pipeline pressure, 流量, PH/ORP, dissolved oxygen, turbidity, chemical reagent concentration, reactor temperature

装置 & システム

1. Complete wastewater treatment equipment: Closed-loop dosing control based on biochemical tank liquid level, aeration pressure, influent and effluent flow rates, and chemical tank liquid level
2. Pure water / reverse osmosis equipment: Collection of product water flow, pre/post-membrane differential pressure and conductivity transmitter signals
3. Chemical reactors / mixing kettles: Interlocked temperature and pressure control based on kettle temperature, internal pressure and raw material feed flow
4. Exhaust gas treatment / desulfurization & denitrification: Monitoring of flue gas temperature, differential pressure, reagent flow and acid-base neutralization concentration

Module Advantages

4~20mA wire break detection: Automatic alarm for broken cables or power loss of transmitters

Digital filtering eliminates power-frequency interference from water pumps and fans

8 channels enable simultaneous acquisition of multiple tank and pipeline measuring points to reduce total module quantity

2. 食べ物 & 飲料 / 医薬品 / Ready Meal Production Lines

Collected Signals

Temperature transmitters (PT100 converted to 4~20mA), tank liquid level, syrup/material flow, filling pressure, vacuum degree

装置

1. Sterilizing kettles, cooking pots: Closed-loop multi-point temperature control with interlock shutdown for overtemperature
2. Batching and mixing systems: Automatic feeding based on raw material tank level and delivery flow ratio
3. Filling and blow molding equipment: Collection of filling pressure and negative vacuum to guarantee filling precision
4. Pharmaceutical purified water and mixing tanks: Compliant data logging of liquid level, temperature and differential pressure (GMP traceability)

Matching Strengths

±0.2% FS high precision at room temperature meets process metering requirements; peak hold captures instantaneous pressure fluctuations.

3. 包装 / 印刷 / ゴム & Plastics Machinery

Collected Signals

Predominantly 0~10V voltage signals: Servo/inverter speed feedback, tension sensors, mold cavity pressure, melt extrusion pressure

装置

1. 垂直 / horizontal packaging machines: Film roll tension and heat-seal temperature acquisition for constant-tension closed-loop control
2. 射出成形 / 押出機: Segmented barrel temperature, melt pressure and hydraulic system oil pressure
3. Printing machines: Roller pressing pressure and ink concentration transmitter signals
4. Blow molding and bag-making equipment: Mold temperature and air supply pressure monitoring

Matching Advantages

High-speed 250μs per channel conversion captures rapidly varying tension and pressure; centralized multi-channel acquisition of all analog feedback signals from the whole machine.

4. 空調設備, ビルディングオートメーション & セントラル空調

Collected Signals

温度 & humidity transmitters (4～20mA), air duct differential pressure, cold/hot water flow, chilled water pressure, CO₂ concentration

システム

Factory central air conditioning, cleanroom air handlers, constant temperature & humidity units for dust-free workshops, fresh air & 排気システム

Application Purpose

Automatically adjust fan speed and chilled water valve opening based on indoor temperature, humidity and CO₂ concentration for energy-saving coordinated control.

5. エネルギー, 太陽光発電, ウォーターポンプ & Fan Stations

Collected Signals

Battery temperature, solar irradiance intensity, pump outlet pressure, water tank liquid level, motor bearing temperature

Scenarios

1. PV energy storage cabinets: Multi-point temperature measurement of ambient environment and battery packs
2. Constant-pressure water supply pump rooms: Closed-loop variable-frequency constant pressure control via pipeline pressure acquisition
3. Air compressor stations: Monitoring and early warning of air tank pressure, exhaust temperature and lubricant oil temperature
4. Boiler auxiliary equipment: Feed water flow, furnace negative pressure and flue gas exhaust temperature
5. 工作機械, 自動生産ライン & Custom Non-Standard Equipment

Collected Signals

Hydraulic oil pressure, cylinder pressure, cutting fluid temperature, 0~10V displacement sensors, vibration transmitters

装置

CNC旋盤, 組立ライン, stamping equipment, automated test fixtures

コア機能

Equipment condition early warning with automatic shutdown for excessively low oil pressure or high temperature; dimensional inspection via displacement signal collection.

7. Agriculture, 水の保全 & Aquaculture
8. Aquaculture: Automatic aeration and water exchange interlock based on water dissolved oxygen, water temperature and pond liquid level
9. 灌漑 & water conservancy: Automatic irrigation control via collection of pipeline flow, pool liquid level and soil humidity transmitter signals

Not Recommended Application Scenarios (Model Selection Pitfall Avoidance)

1. Demand for strong isolation between multiple channels: Only the bus side features optocoupler isolation with no inter-channel isolation. For sites with multi-sensor separate grounding or severe interference, prioritize CJ1W-AD041-V2 (channel-isolated model).
2. Control cabinets with high voltage and intense electromagnetic fields or dense inverters: External signal isolators must be installed to prevent severe signal drift.
3. Less than 4 analog measuring points: Select CJ1W-AD041-V1 for lower cost; choose CJ1W-AD161 for high-density 16-point acquisition.

Application Value Corresponding to Core Module Functions

1. Wire Break Detection → Prevents circuit faults for 4–20mA transmitters in water treatment and chemical industries
2. Digital Average Filter → Anti-interference for on-site water pumps, fans and inverters
3. Peak / Valley Hold → Recording of injection melt pressure and instantaneous stamping pressure
4. Offset & Gain Calibration → Corrects long-term sensor zero drift to sustain consistent measurement accuracy
5. 8-Channel Mixed Signal Compatibility → Supports mixed wiring of voltage and current transmitters on a single module to reduce cabinet module count