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8 Channel Voltage Analog Input Module for MELSEC-Q Series PLC
Q68ADV Module
Module Terminal View
Product Overview
The Q68ADV is an exclusive voltage-only analog-to-digital conversion expansion module designed for Mitsubishi MELSEC-Q series PLC racks. It collects analog voltage signals from industrial field transmitters, sensors and measuring instruments, and converts continuous analog voltage signals into digital data readable by the PLC CPU. Equipped with 8 independent voltage input channels, it supports multi-range voltage signal collection and high-speed sampling, serving as the core signal acquisition unit for process monitoring, closed-loop regulation and precise measurement systems.
Key Advantages (Core Features)
8 Independent Voltage Input Channels
Software-selectable multi voltage ranges (-10~10V, 0~10V, 0~5V, 1~5V), compatible with most standard industrial voltage transducers.
High-Speed & Dual Resolution Modes
Ultra-fast conversion speed of 80μs per channel; switchable normal/high resolution modes for balancing response speed and measuring precision.
High Measuring Accuracy
Basic full-scale accuracy within ±0.1%; built-in temperature drift correction function reduces thermal error to ±0.3% FS for stable long-term operation.
Photocoupler Isolation Design
Isolation between external signal terminals and PLC internal power (500V AC withstand for 1 minute), effectively blocking electromagnetic interference from field equipment.
Diagnostic LED Indicators
Module RUN/ERROR LED and channel status indicators for quick wiring troubleshooting and fault localization.
Standard Q-Series Form Factor
Compact rack-mount design, occupies 16 I/O allocation points, direct plug-in installation on Q series base unit without extra wiring modification.
80μs per channel; +160μs extra if temperature drift correction enabled
Resolution Modes
Normal: -4000 ~ 4000
High Resolution: -16000 ~ 16000
Basic Accuracy (25°C)
Within ±0.1% full scale
Accuracy with Temp Correction
Within ±0.3% full scale
Isolation Method
Photocoupler isolation (I/O terminals ↔ PLC internal power); No isolation between analog channels
Withstand Voltage
500V AC, 1 minute between external terminals and PLC power circuit
Terminal Block
18-point M3 screw terminal block
Internal Power Draw (5VDC from PLC base)
0.64 A
Occupied PLC I/O Points
16 points
Dimensions (W × H × D)
27.4 mm × 98 mm × 90 mm
Net Weight
0.19 kg
Operating Ambient Temp
0 ~ +55°C
Storage Temp
-20 ~ +70°C
Certifications
CE, UL/cUL, RoHS
Application Industries & Scenarios
1. Factory Process Automation
Collect voltage signals from pressure, temperature, flow and level transmitters for real-time production parameter monitoring and PID closed-loop control.
2. Packaging & Printing Machinery
Monitor tension sensor, speed encoder and thickness detection voltage signals for synchronized motion control and product quality inspection.
3. Hydraulic & Pneumatic Equipment
Detect proportional valve control voltage, pressure sensor output to realize precise pressure/flow regulation.
4. Water & Wastewater Treatment
Acquire analog signals from liquid level, PH value, turbidity transmitters for automatic dosing and pump interlock control.
5. Energy & HVAC Systems
Collect voltage signals of temperature/humidity sensors, air volume transmitters for building energy management and air-conditioning control.
Compliance Statement
The Q68ADV module complies with ECER (ECE R10 EMC) requirements, meets EU electromagnetic compatibility and safety directives, suitable for global industrial and mobile equipment deployment with strict EMC standards.
