Q68ADI 8-Channel Analog Input Module Current 0-20mA | Mitsubishi

The Original New Mitsubishi Q68ADI is an 8-channel analog input module from the MELSEC-Q series, designed for high-precision current signal acquisition in industrial automation systems. It accepts 0–20 mA DC and 4–20 mA DC current inputs with a 16-bit signed binary digital output, providing reliable conversion of analog process signals from transmitters, sensors, and field instruments into digital values for the PLC. Part of the MELSEC-Q modular platform, the Q68ADI integrates directly into Q series base units and is compatible with QnU, QnH, and other Q series CPU modules. Its compact 27.4 mm width and 18-point screw terminal block make it suitable for space-efficient control panel installations.

Core Engineering Highlights:
8 analog input channels (current) | Input range: 0–20 mA DC / 4–20 mA DC | 16-bit signed binary digital output | Resolution modes: 0–4000, –4000–4000, 0–12000, –12000–12000 | Conversion speed: 80 µs per channel | Input resistance: 250 Ω | Photocoupler isolation between I/O terminals and PLC power supply | 18-point screw terminal block | Occupied I/O points: 16 (Intelligent 16 points)

Key Features:

• Original New Mitsubishi Q68ADI module

• 8 analog input channels for current signals (0–20 mA DC, 4–20 mA DC)

• 16-bit signed binary digital output for high-precision measurement

• Multiple resolution modes: 0–4000 (normal), 0–12000 / –12000–12000 (high resolution)

• Fast conversion speed: 80 µs per channel

• 250 Ω input resistance for stable current loop measurement

• Photocoupler insulation between I/O terminals and PLC power supply

• 18-point screw terminal block for field wiring

• Occupied I/O points: 16 (Intelligent 16 points assignment)

• E²PROM write count: max. 100,000 times

• Compact 27.4 mm width for space-saving installation

• DIN rail mounting via Q series base unit

• Suitable for 2-wire transmitter connection (4–20 mA)

Applications:

• Process variable monitoring (pressure, flow, level, temperature) via 4–20 mA transmitters

• Current loop signal acquisition in industrial automation systems

• Factory automation and process control systems

• Data acquisition for packaging, material handling, and manufacturing equipment

• Integration with 2-wire transmitters and current-output sensors

Technical Specifications:

System Compatibility:

• Compatible with Mitsubishi MELSEC-Q series base units (main base and extension base)

• Compatible with Q series CPU modules including QnU, QnH, QnPH, QnPRH, and Q00J/Q00/Q01 series

• Installs in any Q series I/O slot via the Q series backplane bus

• Programming and configuration via GX Works2 or GX Developer engineering software

Related Products:

• Q68ADV – 8-channel analog input module (voltage input)

• Q64AD – 4-channel analog input module (voltage/current)

• Q68DAI – 8-channel analog output module (current output)

• Q68DAV – 8-channel analog output module (voltage output)

• R60ADI8 – Successor module for MELSEC iQ-R series (replacement recommendation)

• Q61P – Power supply module for MELSEC-Q base units

PLC ERA is an independent industrial automation distributor supplying genuine Original New products through established global supply channels. All products are factory sealed when applicable and undergo quality inspection prior to shipment. Mitsubishi, MELSEC, and MELSEC-Q are trademarks of Mitsubishi Electric Corporation.