
ANALOG I/O SM 1234, 4AI/2AO
s7 programming SIMATIC S7-1200, ANALOG I/O SM 1234, 4 AI / 2 AO, +/-10V, 14 BIT RESOLUTION, OR 0-20 MA, 13 BIT RESOLUTION
Supply voltage | |
24 V DC | Yes |
Input current | |
Current consumption, typ. | 60 mA |
from backplane bus 5 V DC, typ. | 80 mA |
Power losses | |
Power loss, typ. | 2 W |
Analog inputs | |
Number of analog inputs | 4; Current or voltage differential inputs |
permissible input frequency for current input (destruction limit), max. | ± 35 V |
permissible input voltage for voltage input (destruction limit), max. | 35 V |
permissible input current for voltage input (destruction limit), max. | 40 mA |
permissible input current for current input (destruction limit), max. | 40 mA |
Cycle time (all channels) max. | 625 µs |
Input ranges | |
Voltage | Yes; ±10 V, ±5 V, ±2.5 V |
Current | Yes; 0 to 20 mA |
Thermocouple | No |
Resistance thermometer | No |
Resistance | No |
Input ranges (rated values), voltages | |
-10 V to +10 V | Yes |
Input resistance (-10 V to +10 V) | ≥9 MOhm |
-2.5 V to +2.5 V | Yes |
Input resistance (-2.5 V to +2.5 V) | ≥9 MOhm |
-5 V to +5 V | Yes |
Input resistance (-5 V to +5 V) | ≥9 MOhm |
Input ranges (rated values), currents | |
0 to 20 mA | Yes |
Input resistance (0 to 20 mA) | 280 Ω |
Thermocouple (TC) | |
Temperature compensation | |
Parameterizable | No |
Analog outputs | |
Number of analog outputs | 2; Current or voltage |
Output ranges, voltage | |
-10 to +10 V | Yes |
Output ranges, current | |
0 to 20 mA | Yes |
Load impedance (in rated range of output) | |
with voltage outputs, min. | 1000 Ω |
with current outputs, max. | 600 Ω |
Analog value creation | |
Measurement principle | Differential |
Integrations and conversion time/ resolution per channel | |
Resolution (incl. overrange) | Voltage: 14 bits; Current : 13 bits |
Integration time, parameterizable | Yes |
Interference voltage suppression for interference frequency f1 in Hz | 40 dB, DC to 60 V for interference frequency 50 / 60 Hz |
Smoothing of measured values | |
Parameterizable | Yes |
Step: None | Yes |
Step: low | Yes |
Step: Medium | Yes |
Step: High | Yes |
Errors/accuracies | |
Temperature error (relative to input area) | 25 °C ±0.1 % to 55 °C ±0.2 % total measurement range |
Temperature error (relative to output area) | 25 °C ±0.3% to 55 °C ±0.6% total measurement range |
Basic error limit (operational limit at 25 °C) | |
Voltage, relative to input area | +/- 0.1 % |
Current, relative to input area | +/- 0.1 % |
Voltage, relative to output area | +/- 0.3 % |
Current, relative to output area | +/- 0.3 % |
Interference voltage suppression for f = n x (f1 +/- 1 %), f1 = interference frequency | |
common mode voltage, max. | 12 V |
Interrupts/diagnostics/status information | |
Alarms | |
Alarms | Yes |
Diagnostic alarm | Yes |
Diagnostic messages | |
Diagnostic functions | Yes |
Monitoring the supply voltage | Yes |
Wire break | Yes |
Short circuit | Yes |
Diagnostics indication LED | |
for status of the inputs | Yes |
For status of the outputs | Yes |
for maintenance | Yes |
Galvanic isolation | |
Galvanic isolation analog outputs | |
between the channels and the power supply of the electronics | No |
Degree and class of protection | |
IP20 | Yes |
Standards, approvals, certificates | |
CE mark | Yes |
C-TICK | Yes |
FM approval | Yes |
Climatic and mechanical conditions for storage and transport | |
Climatic conditions for storage and transport | |
Free fall | |
Drop height, max. (in packaging) | 0.3 m; five times, in dispatch package |
Temperature | |
Permissible temperature range | -40 °C to +70 °C |
Air pressure acc. to IEC 60068-2-13 | |
Permissible air pressure | 1080 to 660 hPa |
Mechanical and climatic conditions during operation | |
Climatic conditions in operation | |
Temperature | |
Permissible temperature range | 0 °C to 55 °C horizontal installation 0 °C to 45 °C vertical installation |
Air pressure acc. to IEC 60068-2-13 | |
Permissible air pressure | 1080 to 795 hPa |
Pollutant concentrations | |
SO2 at RH < 60% without condensation | S02: < 0.5 ppm; H2S: < 0.1 ppm; RH < 60% condensation-free |
Connection method | |
required front connector | Yes |
Mechanics/material | |
Type of housing (front) | |
Plastic | Yes |
Dimensions | |
Width | 45 mm |
Height | 100 mm |
Depth | 75 mm |
Weights | |
Weight, approx. | 220 g |