Analog Modules
4-4
Programmable Logic Controllers S7-300 Module Data
A5E00105505-03
Table 4-1 Analog Input Modules: Characteristics at a Glance
Module
Char-
acter-
istics
SM 331;
AI 8 x 16 bits
(-7NF00-)
SM 331;
AI 8 x 16 bits
(-7NF10-)
SM 331;
AI 8 x 14 bits
High Speed
(-7HF0x-)
SM 331;
AI 8 x 13 bits
(-1KF01-)
Number of
inputs
8 inputs in 4
channel groups
8 inputs in 4
channel groups
8 inputs in 4
channel groups
8 inputs in 8
channel groups
Resolution Adjustable for each
channel group:
• 15 bits + sign
Adjustable for each
channel group:
• 15 bits + sign
Adjustable for each
channel group:
• 13 bits + sign
Adjustable for each
channel group:
• 12 bits+sign
Measuring
Method
Adjustable for each
channel group:
• Voltage
• Current
Adjustable for each
channel group:
• Voltage
• Current
Adjustable for each
channel group:
• Voltage
• Current
Adjustable for each
channel:
• Voltage
• Current
• Resistors
• Temperature
Selection of
measuring
range
Arbitrary, per
channel group
Arbitrary, per
channel group
Arbitrary, per
channel group
Arbitrary,
per channel
Supports
clocked
operation
No No Yes No
Programmable
diagnostics
Yes Yes Yes No
Diagnostic
interrupt
Adjustable Adjustable Adjustable No
Limit value
monitoring
Adjustable for
2 channels
Adjustable for
8 channels
Adjustable for
2 channels
No
Hardware
interrupt upon
limit violation
Adjustable Adjustable Adjustable No
Hardware
interrupt at end
of cycle
No Yes No No
Potential
relationships
Galvanic isolation
to:
• CPU
Galvanic isolation
to:
• CPU
Galvanic isolation
to:
• CPU
• Load voltage (not
for 2-DMU)
Galvanic isolation
to:
• CPU
Permitted
potential
difference
between the
inputs (ECM)
50 VDC 60 VDC 11 VDC 2.0 VDC
Special
Features
– - – –
Sign Sign
2-DMU 2-wire transmitter
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