
Digital modules
4.9 Digital input module SM 421; DI 16 x AC 120 V (6ES7421-5EH00-0AA0)
S7-400 Automation System Module Data
Reference Manual, Edition 09/2009, A5E00850736-06
123
Input delay
At "0" to "1" transitions
2 to 15 ms
With "1" to "0"
5 to 25 ms
Input characteristics In accordance with IEC 61131; type 2
Connection of 2-wire BEROs
Permissible quiescent current
Supported
Max. 4 mA
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