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Q68RD3-G
The Mitsubishi Q68RD3-G is a high-precision temperature input module for the MELSEC-Q series PLC, designed to interface with RTDs (Resistance Temperature Detectors) such as Pt100 and JPt100 sensors. It provides 8-channel isolated input with 16-bit resolution, ensuring accurate temperature monitoring for industrial process control.
DESCRIBE
Key Features
1. Input Specifications
Channels: 8 isolated inputs (supports 2-wire/3-wire RTDs)

Sensor Compatibility:

Pt100 (JIS C1604, IEC 60751)

JPt100 (JIS C1604)

Temperature Range:

Pt100: -200°C to +850°C

JPt100: -200°C to +500°C

Resolution: 0.1°C (16-bit conversion)

Accuracy: ±0.3°C (for Pt100 at 0°C)

2. Advanced Functions
Disconnection Detection: Alerts for broken sensor wires

Scaling & Alarm Setting: Configurable high/low limits

Cold Junction Compensation: Not required (RTD-specific module)

Data Sampling Speed: 10 ms/channel (all channels)

3. Isolation & Noise Immunity
Channel-to-Channel Isolation: 2,500V AC for 1 min

Noise Resistance: 1,500Vp-p noise voltage (with noise filter)

4. Integration & Configuration
Mounting: Installs on MELSEC-Q base unit (Q3B/Q6B)

Configuration: Set up via GX Works2 software

Diagnostics: LED indicators for channel status

5. Industrial Durability
Operating Temperature: 0°C to 55°C

Enclosure Rating: IP2X (for panel mounting)
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