| SIMATIC S7-300, Control Unit FM 355 C, 4 channels, continuous, 4 AI+8 DI+4 AO incl. multi-language configuration package, Manual and Getting Started (de, de, fr, en fr, it) on CD-ROM |
Supply voltage |
Load voltage L+ |
● Rated value (DC) | 24 V |
● permissible range, lower limit (DC) | 20.4 V |
● permissible range, upper limit (DC) | 28.8 V |
Input current |
from load voltage L+ (without load), max. | 310 mA; Typ. 260 mA |
from backplane bus 5 V DC, max. | 75 mA; typ. 50 mA |
Power loss |
Power loss, typ. | 6.5 W |
Power loss, max. | 7.8 W |
Digital inputs |
Number of digital inputs | 8 |
Input characteristic curve in accordance with IEC 61131, type 2 | Yes |
Input voltage |
● Rated value (DC) | 24 V |
● for signal “0” | -3 to +5V |
● for signal “1” | 13 to 30V |
Input current |
● for signal “1”, typ. | 7 mA |
Cable length |
● shielded, max. | 1 000 m |
● unshielded, max. | 600 m |
Analog inputs |
Number of analog inputs | 4 |
permissible input voltage for voltage input (destruction limit), max. | 30 V |
permissible input current for current input (destruction limit), max. | 40 mA |
Input ranges |
● Voltage | Yes |
● Current | Yes |
● Thermocouple | Yes |
● Resistance thermometer | Yes |
Input ranges (rated values), voltages |
● 0 to +10 V | Yes |
— Input resistance (0 to 10 V) | 100 kΩ |
● -1.75 V to +11.75 V | Yes |
— Input resistance (-1.75 V to +11.75 V) | 100 kΩ |
● -80 mV to +80 mV | Yes |
— Input resistance (-80 mV to +80 mV) | 10 MΩ |
Input ranges (rated values), currents |
● 0 to 20 mA | Yes |
— Input resistance (0 to 20 mA) | 50 Ω |
● 0 to 23.5 mA | Yes |
— Input resistance (0 to 23.5 mA) | 50 kΩ |
● -3.5 mA to +23.5 mA | Yes |
— Input resistance (-3.5 mA to +23.5 mA) | 50 Ω |
● 4 mA to 20 mA | Yes |
— Input resistance (4 mA to 20 mA) | 50 kΩ |
Input ranges (rated values), thermocouples |
● Type B | Yes |
— Input resistance (Type B) | 10 MΩ |
● Type J | Yes |
— Input resistance (type J) | 10 MΩ |
● Type K | Yes |
— Input resistance (Type K) | 10 MΩ |
● Type R | Yes |
— Input resistance (Type R) | 10 MΩ |
● Type S | Yes |
— Input resistance (Type S) | 10 MΩ |
Input ranges (rated values), resistance thermometer |
● Pt 100 | Yes |
— Input resistance (Pt 100) | 10 MΩ |
Thermocouple (TC) |
Temperature compensation |
— internal temperature compensation | Yes |
— external temperature compensation with Pt100 | Yes |
Characteristic linearization |
● parameterizable | Yes |
Cable length |
● shielded, max. | 200 m; 50 m at 80 mV and thermocouples |
Analog outputs |
Number of analog outputs | 4 |
Voltage output, short-circuit protection | Yes |
Voltage output, short-circuit current, max. | 25 mA |
Current output, no-load voltage, max. | 18 V |
Output ranges, voltage |
● 0 to 10 V | Yes |
● -10 V to +10 V | Yes |
Output ranges, current |
● 0 to 20 mA | Yes |
● 4 mA to 20 mA | Yes |
Connection of actuators |
● for voltage output two-wire connection | Yes |
● for current output two-wire connection | Yes |
Load impedance (in rated range of output) |
● with voltage outputs, min. | 1 kΩ |
● with voltage outputs, capacitive load, max. | 1 µF |
● with current outputs, max. | 500 Ω |
● with current outputs, inductive load, max. | 1 mH |
Cable length |
● shielded, max. | 200 m; 50 m at 80 mV and thermocouples |
Analog value generation for the inputs |
Integration and conversion time/resolution per channel |
● Resolution with overrange (bit including sign), max. | 14 bit; 12 bit or 14 bit, parameterizable |
Analog value generation for the outputs |
Settling time |
● for resistive load | 0.1 ms |
● for capacitive load | 3.3 ms |
● for inductive load | 0.5 ms |
Encoder |
Connection of signal encoders |
● for voltage measurement | Yes |
● for current measurement as 4-wire transducer | Yes |
Connectable encoders |
● 2-wire sensor | Yes |
— permissible quiescent current (2-wire sensor), max. | 1.5 mA |
Errors/accuracies |
Operational error limit in overall temperature range |
● Voltage, relative to input range, (+/-) | 0.6 %; ±0.6 to ±1% |
● Current, relative to input range, (+/-) | 0.6 %; ±0.6 to ±1% |
● Resistance thermometer, relative to input range, (+/-) | 0.6 %; ±0.6 to ±1% |
● Voltage, relative to output range, (+/-) | 0.5 % |
● Current, relative to output range, (+/-) | 0.6 % |
Basic error limit (operational limit at 25 °C) |
● Voltage, relative to input range, (+/-) | 0.4 %; 80 mV: ±0.6 %; 250 to 1 000 mV: ±0.4 %; 2.5 to 10 V: ±0.6 %; 3.2 to 20 mA: ±0.5 % |
● Current, relative to input range, (+/-) | 0.4 %; ±0.4 to ±0.6 % |
● Resistance thermometer, relative to input range, (+/-) | 0.4 %; ±0.4 to ±0.6 % |
● Voltage, relative to output range, (+/-) | 0.3 % |
● Current, relative to output range, (+/-) | 0.5 % |
Interrupts/diagnostics/status information |
Substitute values connectable | Yes; Parameterizable |
Integrated Functions |
Counter | No |
Control technology |
● Number of closed-loop controllers | 4 |
Potential separation |
Potential separation controller |
● between the channels | No |
● between the channels and backplane bus | Yes; Optocoupler |
Isolation |
Isolation tested with | 500 V DC |
Connection method |
required front connector | 2x 20-pin |
Dimensions |
Width | 80 mm |
Height | 125 mm |
Depth | 120 mm |
Weights |
Weight, approx. | 470 g |
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