Mitsubishi Q68ADI MELSEC-Q 8-Channel Analog Input Module 0-20mA

Mitsubishi Electric MELSEC-Q series analog-digital converter module with 8 independent current input channels. Input range 0‑20 mA DC (4‑20 mA configurable), input resistance 250 Ω. Converts analog current signals from field devices (flow meters, pressure gauges, level transmitters) into 16‑bit signed binary digital values. High‑speed conversion at 80 μs per channel, selectable resolution modes (1/4000, 1/12000, 1/16000). 18‑point screw terminal block, 5 V DC internal power consumption 0.64 A. For MELSEC‑Q series CPU racks.

Applications:

• Flow meter and pressure gauge monitoring in process control

• Level transmitter signal acquisition for tank and silo systems

• Current loop signal input (4‑20 mA) from industrial sensors

• Factory automation and machine control analog data logging

Core Specifications:

• Number of input channels: 8 (dedicated current input)

• Input range: 0‑20 mA DC (4‑20 mA configurable via GX Developer), input resistance 250 Ω

• Digital output: 16‑bit signed binary

• Conversion speed: 80 μs per channel

• Resolution modes: Normal resolution mode (–4096 to 4095), High resolution mode (–12288 to 12287 or –16384 to 16383)

• Accuracy: ±0.1% (at 25 ± 5 °C)

• Temperature drift compensation: processing time adds 160 s when used

• Absolute maximum input: ±30 mA

Advanced Specifications:

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

• Connection: 18‑point screw terminal block (M3 screws), applicable wire size 0.3‑0.75 mm² (22‑18 AWG), applicable solderless terminal R1.25‑3

• Insulation: Photocoupler insulation between I/O terminals and programmable controller power supply (500 V AC dielectric withstand for 1 min, 500 V DC insulation resistance ≥ 20 MΩ); no insulation between input channels

• E²PROM write count: max. 100,000 times

• 5 V DC internal current consumption: 0.64 A

• Protection rating: IP20

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

• Weight: 0.19 kg

• Operating temperature: 0 °C … 55 °C

System Integration:

• This module belongs to the Mitsubishi Electric MELSEC‑Q series.

• Installs into any MELSEC‑Q series main base unit or extension base unit slot.

• Compatible with Q series CPU modules (Q00J, Q00, Q01, Qn, QnH, QnPH, QnPRH, QnU series).

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

• GX Configurator‑AD utility package (sold separately) provides on‑screen parameter setting (initial settings/auto refresh settings) and automatic FB generation.

• The module occupies 16 I/O points and is assigned as an Intelligent 16‑point unit.

Related Products:

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

• Q68ADV – 8‑channel analog input module (voltage input only)

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

• Q68DAIN – 8‑channel analog output module (current output)

• Q68DAVN – 8‑channel analog output module (voltage output)