Siemens SIMATIC S7-300 Series Reference Manual page 48

CPUs
Technical Specifications of the Digital Inputs of the CPU 312IFM
Note
Alternatively, you can configure the inputs I 124.6 and I 124.7 as special inputs, in
which case the technical specifications listed for the special inputs apply to the
inputs I 124.6 and I 124.7.
Module-Specific Data
Number of inputs
Cable length
S
Unshielded
S
Shielded
Voltages, Currents, Potentials
Number of inputs that can
be triggered simultaneously
S
(horizontal
configuration)
up to 60°C
S
(vertical configuration)
up to 40°C
Galvanic isolation
1-32
Status, Interrupts; Diagnostics
8 Status display
Interrupts
max. 600 m
max. 1000 m Diagnostic functions
Sensor Selection Data
8 Input voltage
S
Rated value
S
For "1" signal
S
8
For "0" signal
Input current
8
S
For "1" signal
Input delay time
No
S
For "0" to "1"
S
For "1" to "0"
Input characteristic
Connection of 2-wire
BEROs
S
Permissible quiescent
current
PLC S7-300, CPU Specifications CPU 312 IFM to CPU 318-2 DP
1 green LED per
channel
None
None
24V DC
11 to 30 V
-3 to 5 V
typical 7 mA
1.2 to 4.8 ms
1.2 to 4.8 ms
to IEC 1131, Type 2
Possible
max. 2 mA
A5E00111190-01