Mitsubishi Electric Q68AD-G MELSEC-Q Series Channel-to-Channel Isolated Analog-to-Digital Conversion Unit

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Manufacturer: Mitsubishi Electric
Product No.: Q68AD-G
Country of origin:United States
Product Type: Analog Input Modules
Payment: T/T, Western Union
Weight: 160g
Dimensions: 102 mm x 27.4 mm x 90 mm
Shipping port: Xiamen
Warranty: 12 months

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Description

Engineered for precise industrial process automation, the Q68AD-G functions as a channel-to-channel isolated analog-to-digital conversion module designed for the Mitsubishi MELSEC-Q Series PLC platform. This module features eight independent channels, providing robust electrical separation between inputs to eliminate ground loops and minimize signal interference in complex electrical environments.

Each channel can be independently configured to accept either voltage or current signals, accommodating standard industrial sensors and transmitters. The integration of high-resolution digital conversion options and dedicated scaling functions allows for precise data acquisition, delivering reliable metrics directly to the master controller backplane. External connections are consolidated through a high-density 40-pin interface, ensuring secure and compact field wiring.

Features

Complete channel-to-channel isolation using internal transformer technology to safeguard control circuitry.
Eight independent analog input channels supporting mixed voltage and current configurations.
Dual resolution operation settings: Normal resolution mode and High resolution mode for granular tracking.
Fast conversion rate with a sampling cycle of 10 ms per active channel.
Broad signal range support including standard industrial ranges (1 to 5 V, 0 to 5 V, 0 to 10 V, -10 to 10 V, 0 to 20 mA, and 4 to 20 mA).

Applications

Power generation and substation telemetry monitoring.
Oil and gas refinery instrumentation.
Water and wastewater treatment facility chemical dosage monitoring.
Steel manufacturing plant temperature and pressure tracking.

Technical Specifications

Manufacturer	Mitsubishi Electric
Part Number / Model	Q68AD-G
Module Type	Channel-to-Channel Isolated Analog-to-Digital Conversion Unit
Analog Inputs	8 points (8 channels)
Voltage Input Range	DC -10 to +10 V (Input resistance: 1 MOhm or more)
Current Input Range	DC 0 to 20 mA (Input resistance: 250 Ohm)
Sampling Cycle	10 ms / channel
Response Time	20 ms
Absolute Maximum Input	Voltage: ±15 V, Current: ±30 mA
Isolation Method	Transformer isolation between input terminals and PLC power supply, and between individual analog input channels
Withstand Voltage (Input to Backplane)	500 V AC rms for 1 minute
Withstand Voltage (Channel to Channel)	1000 V AC rms for 1 minute
Insulation Resistance	10 MOhm or more at 500 V DC
Temperature Coefficient	±71.4 ppm / degC (0.00714% / degC)
Occupied I/O Points	16 points (I/O assignment: 16 points intelligent function module)
Internal Current Consumption (5 V DC)	0.46 A
External Dimensions (H x W x D)	102 mm x 27.4 mm x 90 mm
Weight	0.16 kg

Connections and Interfaces

Interface Element	Specification / Compatibility
External Wiring Interface	40-pin connector
Compatible Connectors	A6CON1, A6CON2, A6CON4 (sold separately)

Installation Guidelines

Always power down the MELSEC-Q base unit before mounting or removing the module to prevent electrical shock or module damage.
Ensure that signal cables are routed away from high-voltage AC lines and motor drive cables to reduce electromagnetic interference.
To satisfy isolation requirements, verify that the external grounding terminal is properly connected to the functional earth of the cabinet.
Securely tighten any connector screws on the 40-pin interface to maintain stable contact resistance during thermal cycles.

Compliance and Certifications

CE Compliant
UL Listed

Key Features:

#Analog Input Modules #MELSEC-Q Series

What is the primary benefit of the channel-to-channel isolation on the Q68AD-G?

Channel-to-channel isolation provides individual electrical separation for all 8 inputs. This prevents ground loops, reduces signal cross-talk, and protects the internal system circuitry from external electrical surges.

Which external connection plugs are required for the Q68AD-G module?

The module utilizes a 40-pin connector. It is compatible with Mitsubishi A6CON1, A6CON2, and A6CON4 connectors, which are sold separately.

What are the voltage and current input ranges supported by this card?

The Q68AD-G supports DC voltage inputs from -10 to +10 V, and DC current inputs from 0 to 20 mA (including standard 4 to 20 mA configurations).

What is the sampling rate of the Q68AD-G analog-to-digital module?

The module features a conversion sampling speed of 10 ms per active channel.

Global Express Shipping

Standard Delivery: 4-6 Business Days via DHL, FedEx, and UPS.
Express Dispatch: Same-day dispatch for in-stock orders placed before 2:00 PM (GMT+8).
Worldwide Coverage: Serving over 150 countries, including rapid delivery to Saudi Arabia and UAE.

Returns & Warranty

30-Day Guarantee: Returns accepted for in-stock products in original, factory-sealed packaging.
12-Month Warranty: Every industrial component is backed by our professional technical warranty.

Orders are processed and delivered Monday-Friday (excluding public holidays).

For full eligibility, restocking fees, and international return details, please view our official Refund & Return Policy .

TECHNICAL SPECIFICATIONS

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Mitsubishi Electric Q68AD-G MELSEC-Q Series Channel-to-Channel Isolated Analog-to-Digital Conversion Unit