Characteristics and Technical Specifications of the SM 335
1-11
SM 335 – High-Speed Analog Input/Output Module for the SIMATIC S7-300
6ES7 335-7HG00-8BA1
1.5.4 Technical specifications for the interval counter
Table 1-5 Technical specifications for the interval counter
Interval-counter-specific data
Number of inputs 1
Cable length shielded 200 m
Voltages, currents, potentials
Rated load voltage L+
• Polarized
24 V DC
Yes
Galvanic isolation Yes
Permissible potential difference
• Interval counter input (M
IZ
terminal)
to the four analog inputs
• Between input (M
IZ
terminal) and central grounding
point
75 V DC/60 V AC
75 V DC/60 V AC
Analog value formation for the interval counter input
Measuring principle Detection of a rising edge and
measuring the amount of time
between two edges
Resolution of the time difference 0.5 ms
Max. frequency
• Programmable
• Interference suppression for
interference frequency f1 in dB
400 Hz
NO
0
Noise suppression and error limits for the input
Noise suppression for
F = n (f1 " 1%), (f1 = interference frequency)
• Common-mode noise (U
pp
t 3 V)
• Series-mode noise
(peak noise value t rated value of the input range)
u 80 dB
0 dB
Operational limit
(over entire temperature range)
Max. 1% at 400 Hz
Basic error
(operational limit at 25
o
C)
0.005%
Temperature drift (0 to 60
o
C) " 0.003%/K
Linearity error 0
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