Cable length
● Unshielded
600 m
● Shielded
1000 m
Voltages, currents, electrical potentials
Number of simultaneously controlled inputs
16 at 120 V
8 at 240 V
16 with fan subassembly
Electrical isolation
● Between channels and the backplane bus
Yes
● Between channels
In groups of
Yes
4
Permissible potential difference
● between M
internal
and inputs
230 VAC
● Between inputs of different groups
500 VAC
Insulation resistance
4000 VAC
Current consumption
● From the backplane bus (5 V)
Max. 100 mA
Power loss of the module
Typ. 3.5 W
Status, interrupts, diagnostics
Status display
Green LED per channel
Interrupts
None
Diagnostic functions
None
Sensor selection data
Input voltage
● Nominal value
120/230 VUC
● For "1" signal
79 to 264 V AC
80 to 264 V DC
● For "0" signal
0 to 48 V UC
● Frequency band
47 to 63 Hz
Input current
● With "1" signal
2 to 5 mA
● With "0" signal
0 to 1 mA
Input delay
● At "0" to "1" transitions
5 to 25 ms
● With "1" to "0"
5 to 25 ms
Input characteristics
In accordance with IEC 61131-2; Type 1
Connection of 2-wire BEROs
● Permissible quiescent current
Supported
Max. 1 mA
Digital modules
4.11 Digital input module SM 421; DI 16 x UC 120/230 V (6ES7 421-1FH00-0AA0)
S7-400 Automation System Module Data
Reference Manual, Ausgabe 11/2016, A5E00850736-08
121