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. ค.ศ: อินพุตแบบอะนาล็อก
3. 08: 8 ช่องสัญญาณเข้าแบบอะนาล็อก
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. Core Hardware Specifications

พารามิเตอร์พื้นฐาน

Input Signal Ranges (Hardware DIP switch selectable per channel)

แรงดันไฟฟ้าขาเข้า (DIP Switch = OFF)

-10～+10V, 0～10V, 0～5V, 1～5V

ความต้านทานอินพุต: ≥1MΩ, Maximum Withstand Voltage: ±15V

อินพุตปัจจุบัน (DIP Switch = ON, built-in 250Ω sampling resistor)

4～20mA, 0～20mA

ความต้านทานอินพุต: 250โอ้, Maximum Withstand Current: ±30mA

ความแม่นยำในการแปลง & ปณิธาน

1. Two software-selectable resolution grades

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

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

2. Full-scale Accuracy (อุณหภูมิแวดล้อม: 25องศาเซลเซียส)

แรงดันไฟฟ้าขาเข้า: ±0.2% เอฟเอส

อินพุตปัจจุบัน: ±0.4% FS

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

สัญญาณแรงดันไฟฟ้า: ±0.4% FS

สัญญาณปัจจุบัน: ±0.6% เอฟเอส

4. ความเร็วในการแปลง: 1ms per channel; full scan of 8 channels takes 8ms; high-speed mode: 250μs per channel
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: วี+ (Signal Positive), คอม (Common Negative)

ช1: Pin1(วี+), Pin2(คอม)

CH2: Pin3(วี+), Pin4(คอม)

CH3: Pin5(วี+), Pin6(คอม)

CH4: Pin7(วี+), Pin8(คอม)

CH5: Pin9(วี+), Pin10(คอม)

CH6: Pin11(วี+), Pin12(คอม)

CH7: Pin13(วี+), Pin14(คอม)

CH8: Pin15(วี+), Pin16(คอม)

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

แนวทางการเดินสายไฟ

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 ช่อง

ช1: 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. ซอฟต์แวร์กำหนดค่า: CX-Programmer + CX-Integrator. Channel addresses are automatically assigned after registering the module in the I/O table.
4. Typical Industrial Application Scenarios
5. การควบคุมของไหล: 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 & เซอร์โวไดรฟ์: Collection of 0~10V speed and torque feedback signals
8. Centralized multi-point analog signal acquisition for water treatment, chemical and packaging machinery
9. การเปรียบเทียบซีรี่ส์เดียวกัน & โซลูชั่นทดแทน

Comparison of Analog Input Modules in the Same Series

อัพเกรด & Compatible Replacements

1. Direct drop-in replacement on the same platform: CJ1W-AD081-V1-SL (ขั้วต่อสปริง, 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 (แนะนำสำหรับโครงการใหม่): NX-AD4208 (8-ช่องอินพุตแบบอะนาล็อก, รถบัส EtherCAT)
5. เมทริกซ์การแก้ไขปัญหาข้อผิดพลาดทั่วไป

9. ข้อจำกัดการใช้งาน (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 (โหมดแรงดันไฟฟ้า) or ±30mA (โหมดปัจจุบัน); 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 / 25องศาเซลเซียส, Full-Scale Error)
2. แรงดันไฟฟ้าขาเข้า (0~5V / 0~10V / -10~+10V / 1~5V)

Overall Accuracy: ±0.2% เอฟเอส

2. อินพุตปัจจุบัน (4~20mA / 0~20mA)

Overall Accuracy: ±0.4% FS

> บันทึก: 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% เอฟเอส

3. ปณิธาน (Distinction Between “ความแม่นยำ” และ “ปณิธาน”)

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

1. Low-speed mode (1ms per channel): 1/4000 (12-นิดหน่อย)
2. โหมดความเร็วสูง (250μs per channel): 1/8000 (13-นิดหน่อย)

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. เคมี / การบำบัดน้ำ / การคุ้มครองสิ่งแวดล้อม (Most Common Application Field)

Collected Signals

Mainly 4~20mA 2-wire transmitters: ระดับของเหลว, pipeline pressure, flow rate, PH/ORP, ออกซิเจนละลาย, turbidity, chemical reagent concentration, reactor temperature

อุปกรณ์ & ระบบ

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. เครื่องปฏิกรณ์เคมี / 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. อาหาร & เครื่องดื่ม / เภสัชกรรม / Ready Meal Production Lines

Collected Signals

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

อุปกรณ์

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. บรรจุภัณฑ์ / การพิมพ์ / ยาง & เครื่องจักรพลาสติก

Collected Signals

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

อุปกรณ์

1. แนวตั้ง / horizontal packaging machines: Film roll tension and heat-seal temperature acquisition for constant-tension closed-loop control
2. การฉีดขึ้นรูป / เครื่องอัดรีด: Segmented barrel temperature, melt pressure and hydraulic system oil pressure
3. เครื่องพิมพ์: 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. เครื่องปรับอากาศ, ระบบอัตโนมัติในอาคาร & เครื่องปรับอากาศส่วนกลาง

Collected Signals

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

ระบบ

Factory central air conditioning, cleanroom air handlers, constant temperature & humidity units for dust-free workshops, fresh air & ระบบไอเสีย

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. พลังงาน, ไฟฟ้าโซลาร์เซลล์, ปั๊มน้ำ & Fan Stations

Collected Signals

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

สถานการณ์

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. เครื่องมือกล, สายการผลิตอัตโนมัติ & Custom Non-Standard Equipment

Collected Signals

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

อุปกรณ์

CNC lathes, สายการประกอบ, stamping equipment, automated test fixtures

ฟังก์ชั่นหลัก

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

7. เกษตรกรรม, Water Conservancy & Aquaculture
8. Aquaculture: Automatic aeration and water exchange interlock based on water dissolved oxygen, water temperature and pond liquid level
9. ชลประทาน & water conservancy: Automatic irrigation control via collection of pipeline flow, pool liquid level and soil humidity transmitter signals

ไม่แนะนำสถานการณ์การใช้งาน (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. น้อยกว่า 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