Digital modules
3.15 Digital input module SM 321; DI 16 x DC 48-125 V; (6ES7321-1CH20-0AA0)
S7-300 Module data
110 Manual, 06/2017, A5E00105505-AJ
Input voltage
• Rated value
48 VDC to 125 VDC
• "1" signal
30 V to 146 V
• "0" signal
-146 V to 15 V
Input current
• "1" signal
typ. 3.5 mA
Input delay
• "0" to "1" transition
• "1" to "0" transition
0.1 ms to 3.5 ms
0.7 ms to 3.0 ms
Connection of 2-wire BEROs
• Permissible quiescent current
supported
max. 1 mA
Wiring the signal transducers
using a 20-pin front connector