Siemens Simatic S7-400 - Page 114

Number of inputs 16
Cable length
● Unshielded, input delay
0.5 ms
3 ms
10 / 20 ms
Maximum 100 m
Maximum 600 m
Maximum 600 m
● Cable length, shielded
1000 m
Voltage, current and potential
Number of inputs that can be enabled simultaneously 16
Electrical isolation
● Between channels and backplane bus
Yes
● Between channels
in groups of
Yes
1
Permissible potential difference
● Between different circuits
60 V DC/30 V AC (SELV)
Insulation tested at
● Channels to backplane bus and load voltage L+
1500 V AC
● Between channels
1500 V AC
Current consumption
● from backplane bus (5 V)
Maximum 150 mA
Module power loss Typ. 8 W
Status, interrupts, diagnostics
Status display Green LED per channel
Interrupts
● Hardware interrupt
Configurable
● Diagnostic interrupt
Configurable
Diagnostic functions Configurable
● Group fault display
for internal fault
for external fault
red LED (INTF)
red LED (EXTF)
● Channel fault display
None
● Diagnostic information can be read out
Possible
Monitoring for
● Wire break
I > 0.7 mA
Substitute values can be connected No
Data for selecting a sensor
Input voltage
● Rated value
UC 24 to 60 V
● For "1" signal
15 to 72 V DC
- 15 to -72 V DC
15 to 60 V AC
● For "0" signal
DC - 6 to +6 V
AC 0 to 5 V
Frequency range DC/AC 47 to 63 Hz
Digital modules
4.10 Digital input module SM 421; DI 16 x UC 24/60 V (6ES7421-7DH00-0AB0)
S7-400 Automation System Module Data
114 Reference Manual, Ausgabe 11/2016, A5E00850736-08