简要说明：SM 335 快速模拟 I / O 模块 将过程的模拟信号转换成用于 SIMATIC S7-300 的数字值 将 SIMATIC S7-300 数字信号转换成用于过程的模拟信号。 另外，

 地址（ Add ）：上海市松江区弘翔路58号195

用于 SIMATIC S7-300 的高速模拟量输入和输出

 用于连接模拟传感器和激励器

SM 335
Module-specific data
Number of inputs	4
Number of outputs	4
Cable length, shielded	200 m
With wire-break monitoring in range 0 V to 10 V	30 m
Voltages, currents, potentials
Rated load voltage	24 V DC
Polarity reversal protection	yes
Galvanic isolation	yes
Permissible potential difference
• between inputs (UCM)	3 V
• between input (M terminal) and central grounding point	75 V DC
• Insulation	tested at 500 V DC
Current consumption
• from S7-300 backplane bus, max.	75 mA
• from L+, max.	150 mA
Power losses, max.	3.6 W
Status, interrupts, diagnostics
Interrupts
• Limit value interrupt	no
• Cycle end interrupt	yes, parameterizable
• Diagnostics interrupt	yes, parameterizable
Diagnostic functions
• Fault display for grouped fault	yes, red LED
• Diagnostic information can be read out	yes
Analog value generation for inputs
Measuring principle	successive approximation
Conversion time per channel	200 μs
• Basic conversion time for 4 channels, max.	1 ms
Resolution
• Bipolar	13 bits + sign
• Unipolar	14 bits
Analog inputs
Interference between inputs
• at 50 Hz	65 dB
• at 60 Hz	65 dB
Operational limits (over entire temperature range, referred to input range)
• with voltage measurement	± 0.15 % (with 14-bit resolution)
• with current measurement	0.25 %
Basic error limit (operational limits at 25 °C, referred to input range)	0.13 % (with 14-bit resolution)
Temperature error (referred to input range)	± 0.1 % (with 14-bit resolution)
Linearity error (referred to input range)	± 0.015 %
Repeatability (under steady-state conditions, at 25 °C, referred to input range)	± 0.05 %
Encoder selection data
Input range (rated values)/input resistance
• Voltage	± 1 V; ± 10 V; ± 2.5 V; 0 V to 2 V; 0 V to 10 V: 10 MΩ
• Current	± 10 mA; 0 mA to 20 mA; 4 mA to 20 mA: 100 Ω
Permissible input voltage for voltage input (destruction limit)	± 30 V
Permissible input current for current input (destruction limit)	25 mA
Connection of signal encoder
• for voltage measurement	possible
• for current measurement
- as 2-wire transducer	not possible
- as 4-wire transducer	possible
• for resistance measurement	not possible
Output for supplying the transducer (short-circuit proof)	10 V/25 mA
Data for encoder supply output
Rated voltage	10 V
Output current, max.	25 mA
Short-circuit proof	yes
Operating limits (over entire temperature range)	0.2 %
Temperature error	0.002 %/K
Basic error for rated voltage	0.1 %
Outputs
Resolution(including overcontrol range)
• ± 10 V	11 bits + sign
• from 0 V to 10 V	12 bits
Conversion time per channel, max.	800 μs
Settling time
• for resistive load	< 0.1 ms
• for capacitive load	< 3.3 ms
• for inductive load	< 0.5 ms
Interference between outputs	40 dB
Substitute values can be switched in	yes
Operational limits (over entire temperature range, referred to output range)	0.5 %
Basic error limit (operational limits at 25 °C, referred to output range)	0.2 %
Linearity error (referred to output range)	± 0.05 %
Repeatability (under steady-state conditions, at 25 °C, referred to output range)	± 0.05 %
Output ripple (referred to output range)	± 0.05 %
Actuator selection data
Input ranges (rated values)	± 10 V and 0 V to 10 V (switchover)
Load impedance
• for voltage outputs, min.	3 kΩ
• for capacitive load, max.	1 μF
• for inductive load, max.	1 mH
Voltage output
• Short-circuit proof	yes
• Short-circuit current, max.	8 mA
Connection of the actuators for voltage output
• as 2-wire connection	possible
• as 4-wire connection	not possible
Dimensions and weight
Dimensions (w x h x d)	40 mm x 125 mm x 120 mm
Weight, approx.	300 g