Products | Smart PLC | Smart 2 | SM-PT100
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SM-PT100
SMART-Module with 4 Optoisolated
PT100 Inputs
The SM-PT100 is used for 2, 3 or 4-wire temperature measurement using PT100 sensors driven by an on-board constant current source.
Capable of connecting sensors measuring temperatures between -200ºC and +850ºC, the SMTHERM uses a fast 16-bit delta-sigma A/D converter that ensures an absolute measurement accuracy of 0.2ºC.
► 2, 3 or 4-wire PT100 sensor inputs
► Open sensor detection
► Self calibration (on-board EEPROM)
► Overvoltage protection
► 2 user configurable LEDs
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Technical Specifications
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Input
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Function
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: PT100 temperature measurement with 4-wire
connection supported and open sensor detection
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Temp. Range
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: -200ºC to +850ºC
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Temp. Drift
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: 1 LSB/ºC (not compensated)
Conversion Time: Typ. 125ms, max. 500ms (depending on filter settings)
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Input Impedance
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: 10 MW(min.)
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Resolution
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: 16-Bit
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Absolute Accuracy
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: ± 0.2ºC (sensor errors excluded)
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Calibration
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: Self calibration
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Linearisation
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: By software
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Overvoltage Protection
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Continuous
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: ± 25V (power connected)
± 35V (power disconnected)
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Common
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Isolation
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: 1.0 kV optoisolated from the system
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EEPROM
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: 256 Byte serial EEPROM for calibration data
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Front Panel
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: 2 Red LEDs (user configurable)
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Weight
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: 40g
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Power Cons.
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: 350mW (min.), 450mW (max.)
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Temp. Ranges
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: 0ºC to +70ºC
-40ºC to +85ºC (opt. E2)
-55ºC to +85ºC (storage)
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Humidity
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: 5% to 95% non-condensing
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