Digital Modules
3-71
Programmable Logic Controllers S7-300 Module Data
A5E00105505-03
Technical specifications of the SM 322; DO 8 x 24 VDC/2 A
Dimensions and Weight
Dimensions W x H x D
(in millimeters)
40 x 125 x 117
Weight Approx. 190 g
Data for Specific Module
Supports clocked
operation
No
Number of outputs 8
Length of cable
• Unshielded
• Shielded
max. 600 m
max. 1000 m
Voltages, Currents, Potentials
Rated load voltage L+ 24 VDC
Total current of the outputs
(per group)
• Horizontal configuration
Up to 60 C max. 4 A
• Vertical configuration
Up to 40 C max. 4 A
Isolation
• Between channels and
backplane bus
Yes
• Between the channels
In groups of
Yes
4
Permitted potential difference
• Between the different
circuits
75 VDC / 60 VAC
Insulation tested with 500 VDC
Current consumption
• From the backplane bus
• From load voltage L+
(without load)
max. 40 mA
max. 60 mA
Power dissipation of the module typ. 6.8 W
Status, Interrupts, Diagnostics
Status display Green LED per channel
Interrupts None
Diagnostic functions None
Data for Selecting an Actuator
Output voltage
• At signal “1” min. L + –0.8 V
Output current
• At signal “1”
Rated value
Permitted range
2 A
5 mA to 2.4 A
• At signal “0”
(leakage current)
max. 0.5 mA
Output delay (for resistive load)
• From “ 0” to “1” max. 100 s
• At “1” to “0” max. 500 s
Load resistor range 12 to 4 k
Lamp load max. 10 W
Parallel connection of
2 outputs
• For redundant triggering of
a load
Possible (only outputs
of the same group)
• To increase performance Not possible
Triggering a digital input Possible
Switch rate
• For resistive load max. 100 Hz
• Inductive loads
according to IEC 947-5-1,
DC 13
max. 0.5 Hz
• For lamp load max. 10 Hz
Limit (internal) of the inductive
circuit interruption voltage up
typ. L + (–48 V)
Short-circuit protection of the
output
Yes, electronic
• Threshold on typ. 3 A
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