Mitsubishi Electric Q68RD3-G

Technical specifications

Manufacturer

Mitsubishi Electric

Manufacturer part no.

Q68RD3-G

Type

Analog input module

Application

I/O module

Used with

MELSEC-Q base units

Number of analog input points

8 points (8 channels)

Number of channels

8 channels

Digital output, Temperature measured value

16-bit signed binary value (-2000...8500)

Digital output, Scaling value

16-bit signed binary value

Applicable resistance temperature detector

Pt100, JPt100, Ni100

Measured temperature range, Pt100

-200...850 ˚C

Measured temperature range, JPt100

-180...600 ˚C

Measured temperature range, Ni100

-60...180 ˚C

Temperature detecting output current

1.0 mA or less

Resolution

0.1 ˚C

Accuracy

Accuracy (ﾟC) = (Conversion accuracy) + (Allowable difference of resistance temperature detector used)

Conversion accuracy, Pt100, -200...850 ﾟC

±0.8 ˚C (ambient temperature: 25±5 ﾟC), ; ±2.4 ˚C (ambient temperature: 0...55 ﾟC)

Conversion accuracy, Pt100, -20...120 ﾟC

±0.3 ˚C (ambient temperature: 25±5 ﾟC), ; ±1.1 ˚C (ambient temperature: 0...55 ﾟC)

Conversion accuracy, Pt100, 0...200 ﾟC

±0.4 ˚C (ambient temperature: 25±5 ﾟC), ; ±1.2 ˚C (ambient temperature: 0...55 ﾟC)

Conversion accuracy, JPt100, -180...600 ﾟC

±0.8 ˚C (ambient temperature: 25±5 ﾟC), ; ±2.4 ˚C (ambient temperature: 0...55 ﾟC)

Conversion accuracy, JPt100, -20...120 ﾟC

±0.3 ˚C (ambient temperature: 25±5 ﾟC), ; ±1.1 ˚C (ambient temperature: 0...55 ﾟC)

Conversion accuracy, JPt100, 0...200 ﾟC

±0.4 ˚C (ambient temperature: 25±5 ﾟC), ; ±1.2 ˚C (ambient temperature: 0...55 ﾟC)

Conversion accuracy, Ni100, -60...180 ﾟC

±0.4 ˚C (Ambient temperature: 25±5 ﾟC), ; ±1.2 ˚C (Ambient temperature: 0...55 ﾟC)

Conversion speed

320 ms/8 channels

Disconnection detection

Available (each channel independent)

Isolation method

Between RTD input and programmable controller power supply, between RTD input channels: transformer isolation

Dielectric withstand voltage

Between RTD input and programmable controller power supply: 500 V AC rms for 1 minute; Between RTD input channels: 1000 V AC rms for 1 minute

Insulation resistance

Between RTD input and programmable controller power supply, between RTD input channels: 500 V DC, 10 MΩ or higher

External interface,

40-pin connector

External interface, Applicable connector

A6CON1, A6CON2, A6CON4 (sold separately)

Technical documents (1)

• Mitsubishi Electric specification database, Q68RD3-G

Key features

• Number of analog input points: 8 points (8 channels)
• Number of channels: 8 channels
• Digital output, Scaling value: 16-bit signed binary value
• Resolution: 0.1 ˚C
• Conversion speed: 320 ms/8 channels

About the Mitsubishi Electric Q68RD3-G

The Mitsubishi Electric Q68RD3-G is a MELSEC-Q analogue input module. Mitsubishi Electric's overview: 8 channels, RTD (Pt100, JPt100, Ni100), conversion speed: 320 ms/8 channels, 40-pin connector, channel isolated. Mitsubishi Electric names the R60RD8-G as its replacement model.

What is the Q68RD3-G used for?

The Q68RD3-G mounts on a MELSEC-Q base unit and connects field signals to the CPU, which reads or writes them each cycle.

Lifecycle and successor

Phased out.

OEM successor: R60RD8-G

Before you order

What to photograph or confirm so the right unit is quoted.

Check the model name Q68RD3-G on the rating plate, with the serial number and function version. Send us a photo of the rating plate and we will confirm the details before quoting.