Siemens SIMATIC - Page 359

Analog modules
6.7 Analog input module SM 331; AI 8 x 12 bit;(6ES7331-7KF02-0AB0)
S7-300 Module data
Manual, 06/2017, A5E00105505-AJ
359
Technical specifications
Technical specifications
Dimensions and weight
Dimensions W x H x D (mm) 40 x 125 x 117
Weight
approx. 250 g
Module-specific data
Supports isochronous mode
No
Number of inputs
• with resistive transducers
8
4
Cable length
• shielded
max. 200 m
max. 50 m at 80 mV and with thermocouples
Voltages, currents, electrical potentials
Rated electronics supply voltage L +
• Reverse polarity protection
24 V DC
Yes
Transducer power supply
• Supply current
• short circuit-proof
max. 60 mA (per channel)
Yes
Constant current for resistive transducers
typ. 1.67 mA (pulsed)
Electrical isolation
• between channels and the backplane bus
• between channels and electronics power supply
– Not for 2-wire transducers
Yes
Yes
Maximum potential difference
• between inputs and M
ANA
(V
CM
)
– at signal = 0 V
• between inputs (V
CM
)
typ. 2.5 V DC (> 2.3 V DC)
typ. 2.5 V DC (> 2.3 V DC)
Isolation test voltage
500 V DC
Current consumption
• from the backplane bus
• from load voltage L+
max. 50 mA
max. 30 mA (without 2-wire transducer)
Power loss of the module
typ. 1 W
Generation of analog values
Measuring principle
Integrating
Integration/conversion time/resolution (per channel)
• programmable
Yes
• Integration time in ms
2.5 16
2
/
3
20 100
• Basic conversion time, including the integration time in ms
3 17 22 102
Additional conversion time for resistance measurement, in ms
or
1 1 1 1