Analog Modules
4-196
Programmable Logic Controllers S7-300 Module Data
A5E00105505-03
Technical specifications of the SM334; AI 4/AO 2 x 12 bits
Dimensions and Weight
Dimensions W x H x D
(in millimeters)
40 x 125 x 117
Weight Approx. 200 g
Data for Specific Module
Supports clocked
operation
No
Number of inputs 4
• For resistance-type sensor 4
Number of outputs 2
Shielded line length max. 100 m
Voltages, Currents, Potentials
Rated load voltage L + 24 VDC
• Reverse polarity protection Yes
Supply voltage of the rated
electronics voltage and rated
load voltage L+
24 VDC
Power supply of the
transmitters
• Short-circuit-proof Yes
Constant measured current for
resistance-type sensor
• For PT 100 typ. 490 A
• At 10 k at 105 A
Isolation
• Between channels and
backplane bus
Yes
• Between channels and
power supply of the
electronics
Yes
Between the channels No
Permitted potential difference
• Between inputs and M
ANA
(U
CM
)
1 V
• Between the inputs (ECM) 1 V
• Between M
ANA
and
M
internal
-(U
ISO
)
75 VDC / 60 VAC
Insulation tested with 500 VDC
Current consumption
• From the backplane bus max. 60 mA
• From power supply and
load voltage L+ (no load)
max. 80 mA
Power dissipation of the module typ. 2 W
Analog Value Generation for the Inputs
Measuring principle Integrating
Integration/conversion time (per
channel)
• Parameters can be
assigned
Yes
• Integration time in
milliseconds
16
2
/
3
20
• Basic conversion time
including Integration time in
milliseconds
72 85
• Additional conversion time
for measuring resistance, in
ms
72 85
• Resolution in bits (incl.)
overrange)
12 bits 12 bits
• Suppression of interference
voltage for interference
frequency f1 in Hertz
60 50
Smoothing of the measured
values
Programmable,
in 2 stages
Time constant of the input
filter
0.9 ms
Basic response time of module
(all channels enabled)
350 ms
Analog Value Generation for the Outputs
Resolution (incl. Overrange 12 bits
Conversion time (per channel) 500 s
Settling time
• For resistive load
• For capacitive load
max. 0.8 ms
max. 0.8 ms
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