Siemens SIMATIC S7-300 Series Reference Manual page 70

CPUs
Technical Specifications of the Digital Inputs of the CPU 314IFM
Module-Specific Data
Number of inputs
Cable length
S
Unshielded
S
Shielded
Voltages, Currents, Potentials
Rated load current L+
S
Polarity reversal
protection
Number of inputs that can
be triggered simultaneously
S
(horizontal
configuration)
up to 60°C
S
(vertical configuration)
up to 40°C
Galvanic isolation
S
between channels and
backplane bus
Permissible potential
difference
S
Between different
circuits
Insulation tested at
Current consumption
S
on power supply L+
1-54
Status, Interrupts; Diagnostics
16 Status display
Interrupts
max. 600 m
max. 1000 m Diagnostic functions
Sensor Selection Data
24V DC Input voltage
S
Yes Rated value
S
For "1" signal
S
For "0" signal
16
Input current
S
For "1" signal
16
Input delay time
S
For "0" to "1"
16
S
For "1" to "0"
Input characteristic
Yes
Connection of 2-wire
BEROs
S
Permissible quiescent
current
75V DC
60V AC
500V DC
max. 40 mA
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