Mitsubishi Q68ADV MELSEC-Q 8‑Channel Analog Input Module Voltage

Mitsubishi Electric Q68ADV is an analog-to-digital converter module for the MELSEC‑Q series. It converts 8 channels of voltage signals into 16‑bit signed binary digital values. Designed for medium‑scale machine automation, process control, and data acquisition systems.

Applications:

• Process variable monitoring (pressure, flow, level, temperature)

• Machine automation and industrial data acquisition

• Packaging machinery and material handling systems

• Voltage signal acquisition from sensors and transmitters

Core Specifications:

• Number of inputs: 8 channels (voltage input)

• Input voltage range: –10 to +10 V DC (input resistance 1 MΩ)

• Absolute maximum input: ±15 V

• Resolution modes (selectable):

  • Normal resolution mode: 1/4000 (–4096 to +4095)

  • High resolution mode: 1/12000 (–12288 to +12287) or 1/16000 (–16384 to +16383)

• Accuracy (at 25 ± 5 °C): ±0.1 % of full scale

• Accuracy (over 0 … 55 °C, with temperature drift compensation): ±0.3 % of full scale

• Conversion speed: 80 μs per channel (when temperature drift compensation is used, 160 μs is added to total processing time)

• Isolation: Photocoupler isolation between I/O terminals and PLC power supply (channels not isolated from each other)

• Occupied I/O points: 16

• Connection: 18‑point screw terminal block

Advanced Specifications:

• Internal current consumption (5 V DC): 0.64 A

• Withstand voltage: 500 V AC for 1 min between I/O terminals and PLC power supply

• Insulation resistance: ≥ 10 MΩ at 500 V DC

• Number of writes to E²PROM (user range settings): max. 100,000 times

• Protection rating: IP2X

• Dimensions (W × H × D): 27.4 mm × 98 mm × 90 mm

• Weight: 0.19 kg

• Operating temperature: 0 °C … 55 °C

• Storage temperature: –20 °C … 75 °C

System Integration:

• This module is part of the Mitsubishi Electric MELSEC‑Q series.

• Installs in any MELSEC‑Q series main base unit (Q3□B, Q5□B, Q6□B series) or extension base unit slot via the Q series backplane bus.

• Input range and resolution mode settings are configurable via GX Works2 or GX Developer engineering software.

• GX Configurator‑AD utility package (sold separately) provides on‑screen parameter setting and auto‑refresh configuration.

• For detailed installation, wiring and configuration, refer to the MELSEC‑Q series User’s Manual.

Related Products:

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

• Q68ADI – 8‑channel analog input module (current input)

• Q61P – Power supply module for MELSEC‑Q base unit