Digital modules
3.13 Digital input module SM 321; DI 16 x 48-125 VDC; (6ES7321-1CH20-0AA0)
S7-300 Automation System Module data
Manual, 08/2006, A5E00105505-04
3-39
Technical data of SM 321; DI 16 x DC 48-125 V
Technical data
Dimensions and weight
Dimensions W x H x D (mm) 40 x 125 x 120
Weight approx. 200 g
Module-specific data
Isochronous mode supported No
Number of inputs 16
Cable length
unshielded
shielded
max. 600 m
max. 1000 m
Voltages, currents, electrical potentials
Number of simultaneously controlled input at V
I
up to 60 V up to 146 V
• horizontal mounting position
up to 50 °C
up to 60 °C
8
8
8
6
• vertical mounting position
up to 40 °C
8 8
Electrical isolation
• between channels and the backplane bus
Yes
• between channels
in groups of
Yes
8
Permissible potential difference
• between different circuits
146 VDC / 132 VAC
Isolation test voltage 1500 VDC
Current consumption
• from the backplane bus
max. 40 mA
Power loss of the module typ. 4.3 W
Status, interrupts, diagnostics
Status display green LED per channel
Interrupts None
Diagnostics functions None
Transducer selection data
Input voltage
• Rated value
48 VDC to 125 VDC
• for "1" signal
30 V to 146 V
• for "0" signal
-146 V to 15 V
Input current
• with "1" signal
typ. 3.5 mA
Input delay
• at "1" to "0"
• at "1" to "0"
0.1 ms to 3.5 ms
0.7 ms to 3.0 ms
Input characteristics to IEC 61131, type 1
Connection of 2-wire BEROs
• Permissible quiescent current
supported
max. 1 mA
Wiring signal transducers with 20-pin front connector
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