Digital modules
3.11 Digital input module SM 321; DI 16 x DC 24 V; source reading; (6ES7321-1BH50-0AA0)
S7-300 Automation System Module data
Manual, 08/2006, A5E00105505-04
3-35
Technical data of SM 321; DI 16 x DC 24 V
Technical data
Dimensions and weight
Dimensions W x H x D (mm) 40 x 125 x 117
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 inputs
• horizontal mounting position
up to 60 °C
16
• vertical mounting position
up to 40 °C
16
Electrical isolation
• between channels and the backplane bus
Yes
• Between channels
in groups of
Yes
16
Permissible potential difference
• between different circuits
75 VDC / 60 VAC
Isolation test voltage 500 VDC
Current consumption
• from the backplane bus
max. 10 mA
Power loss of the module typ. 3.5 W
Status, interrupts, diagnostics
Status display green LED per channel
Interrupts None
Diagnostics functions None
Transducer selection data
Input voltage (reference potential L+)
• Rated value
• for "1" signal
• for "0" signal
24 VDC
-13 V to -30 V
+30 V to -5 V
Input current
• with "1" signal
typ. 7 mA
Input delay
• at "1" to "0"
• at "1" to "0"
1.2 ms to 4.8 ms
1.2 ms to 4.8 ms
Input characteristics to IEC 61131, type 1
Connection of 2-wire BEROs
• Permissible quiescent current
supported
max. 1.5 mA
Wiring signal transducers with 20-pin front connector
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