Bộ điều khiển|module|Siemens|6ES7331-7KF02-0AB0

Analog input module SM 331; AI 8 x 12 bit;(6ES7331-7KF02-0AB0) Order number 6ES7331-7KF02-0AB0 Properties 8 inputs in 4 channel groups Programmable measurement type at each channel group – Voltage – Current – Resistance – Temperature Programmable resolution at each channel group (9/12/14 bits + sign) Any measuring range selection per channel group Programmable diagnostics and diagnostic interrupt Programmable limit value monitoring for 2 channels Programmable hardware interrupt when limit is exceeded Electrically isolated to CPU and load voltage (not for 2-wire transducers) Resolution The resolution of measured values is directly dependent of the selected integration time. In other words, the longer the integration time for an analog input channel, the higher the resolution of a measured value. Diagnostics For information on diagnostics messages at the “group diagnostics” parameter, refer to chapter Diagnostic messages of analog input modules. Hardware interrupts Hardware interrupts for channel groups 0 and 1 can be programmed in STEP 7. However, set a hardware interrupt only for the first channel of a channel group, that is, either at channel 0, or at channel 2 Terminal assignment The diagrams below show various wiring options The input impedance depends on the setting of the measuring range module, see table Measurement types and ranges. Wiring: Voltage measurement Figure: Block diagram and wiring diagram Measuring range module settings Measuring range Measuring range module setting ± 80 mV ± 250 mV ± 500 mV ± 1,000 mV A ± 2.5 V ± 5 V 1 V to 5 V ± 10 V B Wiring: 2-wire and 4-wire transducers for current measurement Figure: Block diagram and wiring diagram Note The interconnection between MANA and M- (terminals 11, 13, 15, 17, 19) is not required when using grounded 4-wire transducers with non-isolated supply. Measuring range module settings Measuring range Measuring range module setting 2-wire transducer 4 mA to 20 mA D 4-wire transducer ± 3.2 mA ± 10 mA 0 mA to 20 mA 4 mA to 20 mA ± 20 mA C Caution Measuring range module in “Current” position Any voltage measurement will destroy the measuring range module if “current” measuring mode is set. Wiring: 2-, 3- and 4-wire connection of resistance transducers or thermoresistors ① 4-wire connection ② 3-wire connection, no compensation for line resistors ③ 2-wire connection, no compensation for line resistors Figure: Block diagram and wiring diagram Measuring range module settings Measuring range Measuring range module setting 150 Ω 300 Ω 600 Ω A Thermoresistor (linear, 4-wire connection) (temperature measurement) RTD-4L Pt 100 Klima Ni 100 Klima Pt 100 Standard Ni 100 Standard A Note “Resistance measurement” is only available at one channel per group. The “2nd” channel of the group is used accordingly for current measuring mode (IC). The “1st” channel of the group returns the measured value. The “2nd” channel of the group is assigned the default overflow value “7FFFH.” There is no compensation of the line resistance with a 2 and 3-wire connection. Wiring: Thermocouples with external compensation Insert a bridge between Comp+ and MANA when using the internal compensation. Figure: Block diagram and wiring diagram Measuring range module settings Measuring range Measuring range module setting Thermocouple TC-I (internal comparison) (thermal voltage measurement) Linearization is ignored Type N [NiCrSi-NiSi] Type E [NiCr-CuNi] Type J [Fe-CuNi] Type K [NiCr-Ni] Type L [Fe-CuNi] A Thermocouple TC-E (external comparison) (thermovoltage measurement) Linearization is ignored Thermocouple (linear, internal comparison) (temperature measurement) TC-IL Type N [NiCrSi-NiSi] Type E [NiCr-CuNi] Type J [Fe-CuNi] Type K [NiCr-Ni] Type L [Fe-CuNi] A Thermocouple (linear, external comparison) (temperature measurement) TC-EL Note An interconnection of M- and MANA is prohibited when using grounded thermocouples. In this case, you must ensure that low-resistance equipotential bonding is in place so that the permitted common-mode voltage is not exceeded. Interconnect M- and MANA when using non-grounded thermocouples Technical specifications Technical specifications Dimensions and weight Dimensions W x H x D (mm) 40 x 125 x 117 Weight approx. 250 g Module-specific data Supports isochronous mode No Number of inputs with resistive transducers 8 4 Cable length shielded max. 200 m max. 50 m at 80 mV and with thermocouples Voltages, currents, electrical potentials Rated electronics supply voltage L + Reverse polarity protection 24 V DC Yes Transducer power supply Supply current short circuit-proof max. 60 mA (per channel) Yes Constant current for resistive transducers typ. 1.67 mA (pulsed) Electrical isolation between channels and the backplane bus between channels and electronics power supply – Not for 2-wire transducers Yes Yes Maximum potential difference between inputs and MANA (VCM) – at signal = 0 V between inputs (VCM) typ. 2.5 V DC (> 2.3 V DC) typ. 2.5 V DC (> 2.3 V DC) Isolation test voltage 500 V DC Current consumption from the backplane bus from load voltage L+ max. 50 mA max. 30 mA (without 2-wire transducer) Power loss of the module typ. 1 W Generation of analog values Measuring principle Integrating Integration/conversion time/resolution (per channel) programmable Yes Integration time in ms 2.5 162/3 20 100 Basic conversion time, including the integration time in ms 3 17 22 102 Additional conversion time for resistance measurement, in ms or 1 1 1 1 additional conversion time for wire-break monitoring in ms or 10 10 10 10 additional conversion time for resistance measurements and wire-break monitoring in ms 16 16 16 16 Resolution in bits (including overrange) 9 bits 12 bits 12 bits 14 bits Interference frequency suppression at interference frequency f1 in Hz 400 60 50 10 Basic execution time of the module in ms (all channels enabled) 24 136 176 816 Measured value smoothing none Interference frequency suppression, error limits Interference frequency suppression at F = n (f1 ± 1 %), (f1 = interference frequency) Common mode interference (VCM < 2.5 V) Series­mode interference (peak interference value < rated input range) > 70 dB > 40 dB Crosstalk between inputs > 50 dB Operational limit (across entire temperature range, relative to the measurement range end value in the selected input range) Voltage input 80 mV 250 mV to 1,000 mV 2.5 V to 10 V ± 1 % ± 0.6 % ± 0.8 % Current input 3.2 mA to 20 mA ± 0.7 % Resistance 150 Ω; 300Ω; 600 Ω ± 0. 7 % Thermocouple Types E, N, J, K, L ± 1. 1 % Resistance thermometer Pt 100/Ni 100 ± 0. 7 % Pt 100 Klima ± 0. 8 % Basic error limit (operational limit at 25 °C, relative to the measurement range end value in the selected input range) Voltage input 80 mV 250 mV to 1,000 mV 2.5 V to 10 V ± 0.7 % ± 0.4 % ± 0.6 % Current input 3.2 mA to 20 mA ± 0.5 % Resistance 150 Ω; 300 Ω; 600 Ω ± 0.5 % Thermocouple Types E, N, J, K, L ± 0.7 % Resistance thermometer Pt 100/Ni 100 ± 0.5 % Pt 100 Klima ± 0.6 % Temperature error (relative to input range) ± 0.005%/K Linearity error (relative to input range) ± 0.05 % Repeat accuracy (in settled state at 25 °C, relative to input range) ± 0.05 % Temperature error of internal compensation ± 1 % Status, interrupts, diagnostics Interrupts Limit interrupt Diagnostic interrupt programmable Channels 0 and 2 programmable Diagnostic functions Group error display Reading diagnostics information programmable red LED (SF) supported Encoder selection data Input ranges (rated values) / input impedance Voltage ± 80 mV ± 250 mV ± 500 mV ± 1,000 mV ± 2.5 V ± 5 V 1 V to 5 V ± 10 V 10 MΩ 10 MΩ 10 MΩ 10 MΩ 100 kΩ 100 kΩ 100 kΩ 100 kΩ Current ± 3.2 mA ± 10 mA ± 20 mA 0 mA to 20 mA 4 mA to 20 mA 25 Ω 25 Ω 25 Ω 25 Ω 25 Ω Resistance 150 Ω 300 Ω 600 Ω 10 MΩ 10 MΩ 10 MΩ Thermocouples Types E, N, J, K, L 10 MΩ Resistance thermometer Pt 100, Ni 100 10 MΩ Maximum voltage at voltage input (destruction limit) max. 20 V, continuous 75 V for the duration of max. 1 s (duty factor 1:20) Maximum current at current input (destruction limit) 40 mA Wiring of the signal transmitters using a 20-pin front connector for voltage measurement supported for current measurement as 2-wire transducer as 4-wire transducer supported supported For thermoresistor/resistance measurement with 2-wire connection Supported, cable resistances are not compensated with 3-wire connection Supported, cable resistances are not compensated with 4-wire connection Supported, cable resistances are compensated Load of the 2-wire transducer max. 820 Ω Characteristics linearization for thermocouples programmable Types E, N, J, K, L for resistance thermometers Pt 100 (Standard and Klima range) Ni 100 (Standard and Klima range) Temperature compensation Internal temperature compensation programmable supported External temperature compensation with compensating box supported Compensation for 0 °C reference junction temperature supported Technical unit of temperature measurement degrees Centigrade