Rtd Input Module Characteristics; Temperature Conversion Characteristics; Conversion Speed; Accuracy - LG MASTER-K G4F-TC2A User Manual

Programmable logic controller

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Chapter 2. SPECIFICATIONS

2.4 RTD Input Module Characteristics

The RTD input module, as shown in the Fig. 2.1, linearlizes the non-linear characteristic resistance

input of the RTD.

[Fig. 2.1] Temperature conversion characteristics( Pt100)

The conversion speed of the RTD input module is 50 ms per channel and its processing is

processed sequentially, that is, one channel is processed and then another channel is

processed.

Processing time = 50 ms the number of the used channels

Example) When three channels are used

2.4.3

The accuracy of RTD input module is within ±0.5 % of all of the measurable temperature range.

Example) When the RTD Pt100 is used, the conversion values of –100°C and 400°C are as

below.

- Measurable temperature full range : 800°C (-200.0°C to 600.0°C)

- Accuracy : 800 (±0.5%) = 800 (±0.005) = ±4°C

- Temperature conversion range : - 104 °C to – 96 °C when –100°C

Resistance

temperature

detection value

Processing time = 50 ms 3 = 150 ms

2 - 5

396°C to 404°C when 400°C

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