Description

140SAI94000S is a safety analog input module (SIL2) of the Modicon Quantum series from Schneider Electric, designed for process safety systems, to collect 4–20mA/0–25mA sensor signals.

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Core parameters
Model: 140SAI94000S
Series: Modicon Quantum (Safety PLC System)
Channels: 8 analog inputs, single-ended, common ground
Measurement range: 0–25mA (compatible with 4–20mA)
Resolution: 16 bits
Accuracy: ±0.3% to ±0.35% of full scale
Input impedance: 287Ω
Filtering: Single-pole low-pass, 15Hz @ –3dB
Update time: 15ms
Isolation: Channel – bus 1500Vrms; channel-to-channel 500Vrms
Safety level: SIL2 (TÜV), compliant with IEC 61508
Power supply: 24VDC, approximately 25mA
Temperature: –25°C ~ +60°C
Size / Weight: 100×45×25mm / approximately 0.5kg

Key features
Functional safety certification: SIL2 level, for safety instrumented systems (SIS), emergency stop (ESD), etc. critical circuits.
High-reliability input: 8 current inputs, 16-bit high precision, suitable for temperature, pressure, level, flow, etc. sensors.
Strong isolation design: High voltage isolation between channels and system, between channels, resistant to interference, suitable for harsh environments such as oil and gas, power, and chemical industries.
Diagnostic completeness: Automatic detection and reporting of open circuit, short circuit, over-range, power supply abnormality to safety system.
Model interpretation
140: Quantum series
SAI: Safety Analog Input (Safety Analog Input)
94000S: 8 channels, 0–25mA, SIL2 version
Typical applications
Petroleum and natural gas: SIS/ESD system analog quantity monitoring
Power energy: Boiler, turbine safety parameter collection
Water treatment: Safety monitoring of key process parameters
Manufacturing: High-risk equipment safety interlock
Replacement / Related models
140SAI95000S: SIL3 version
140SDI95300S: Safety Digital Input Module
140SDO95300S: Safety Digital Output Module