Siemens Simatic S7-300 - Page 61

Digital modules
3.6 Digital input module SM 321; DI 32 x DC 24 V; (6ES7321-1BL00-0AA0)
S7-300 Automation System Module data
Manual, 08/2006, A5E00105505-04
3-13
Terminal assignment of SM 321; DI 32 x DC 24 V
The figure below shows the channel addressing (input byte x up to input byte x+3).
[
[
[
[
Technical data of SM 321; DI 32 x DC 24 V
Technical data
Dimensions and weight
Dimensions W x H x D (mm) 40 x 125 x 120
Weight approx. 260 g
Module-specific data
Isochronous mode supported No
Number of inputs 32
Cable length
• unshielded
• shielded
max. 600 m
max. 1000 m
Front connector 40-pin
Voltages, currents, electrical potentials
Number of simultaneously controlled inputs
• horizontal mounting position
up to 40 °C
up to 60 °C
• vertical mounting position
up to 40 °C
32
16
32
Electrical isolation
• between channels and the backplane bus
• between channels
– in groups of
Yes
Yes
16
Permissible potential difference
• between different circuits
75 VDC / 60 VAC
Isolation test voltage 500 VDC
Current consumption
• from the backplane bus
max. 15 mA
Power loss of the module typ. 6.5 W