
Digital modules
4.12 Digital input module SM 421; DI 16 x UC 120/230 V (6ES7421-1FH20-0AA0)
S7-400 Automation System Module Data
Reference Manual, Edition 09/2009, A5E00850736-06
137
Input current
At signal "1" (120 V)
Typ. 10 mA AC
Typ. 1.8 mA DC
At signal "1" (230 V)
Typ. 14 mA AC
Typ. 2 mA DC
With "0" signal
0 to 6 mA AC
0 to 2 mA DC
Input delay
At "0" to "1" transitions
Maximum AC 20 ms
maximum DC 15 ms
With "1" to "0"
Maximum AC 30 ms
maximum DC 25 ms
Input characteristics In accordance with IEC 61131-2; Type 2
Connection of 2-wire BEROs
Permissible quiescent current
Supported
Max. 5 mA AC
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