Data sheet 6ES7231-5ND32-0XB0 SIMATIC S7-1200, ANALOG INPUT, SM 1231, 4 AI, +/-10V, +/-5V, +/-2.5V, +/-1.25 OR 0-20MA/4-20 MA, 15 BIT + SIGN BIT Supply voltage Rated value (DC) Yes 24 V DC Input current Current consumption, typ. 65mA from backplane bus 5 V DC, typ. 80mA Power loss Power loss, typ. 1.8W Analog inputs Number of analog inputs 4 Current or voltage differential inputs permissible input voltage for current input 15 V (destruction limit), max. permissible input voltage for voltage input 35 V (destruction limit), max. permissible input current for voltage input 40mA limited by input resistance 1 MOhm (destruction limit), max. permissible input current for current input (destruction 40mA limit), max. 6ES7231-5ND32-0XB0 Subject to change without notice 12/04/2017 Copyright Siemens Page 1/4Cycle time (all channels) max. 100s Input ranges Yes 10V, 5V, 2.5V or 1.25V Voltage Yes 4 to 20 mA, 0 to 20 mA Current No Thermocouple No Resistance thermometer No Resistance Input ranges (rated values), voltages Yes -1.25 V to +1.25 V Yes -10 V to +10 V 1 MOhm Input resistance (-10 V to +10 V) Yes -2.5 V to +2.5 V 1 MOhm Input resistance (-2.5 V to +2.5 V) Yes -5 V to +5 V 1 MOhm Input resistance (-5 V to +5 V) Input ranges (rated values), currents Yes 0 to 20 mA Yes 4 mA to 20 mA Analog value generation for the inputs Integration and conversion time/resolution per channel 15bit + sign Resolution with overrange (bit including sign), max. Yes Integration time, parameterizable 40 dB, DC to 60 V for interference frequency 50 / 60 Hz Interference voltage suppression for interference frequency f1 in Hz Smoothing of measured values Yes parameterizable Yes Step: None Yes Step: low Yes Step: Medium Yes Step: High Errors/accuracies Temperature error (relative to input range), (+/-) 25 C 0.1% / 0.3% total measurement range Basic error limit (operational limit at 25 C) 0.1% Voltage, relative to input range, (+/-) 0.1% Current, relative to input range, (+/-) Interference voltage suppression for f = n x (f1 +/- 1 %), f1 = interference frequency 12V Common mode voltage, max. Interrupts/diagnostics/status information Alarms Yes Diagnostic functions Yes 6ES7231-5ND32-0XB0 Subject to change without notice 12/04/2017 Copyright Siemens Page 2/4