Siemens Simatic S7-300 - Page 159

Digital Modules
3-75
Programmable Logic Controllers S7-300 Module Data
A5E00105505-03
Technical specifications of the SM 322; DO 8 x 24 VDC/0.5 A
Dimensions and Weight
Dimensions W x H x D
(in millimeters)
40 x 125 x 117
Weight Approx. 210 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) without series diode
• Horizontal configuration
Up to 40 C
Up to 60 C
max. 4 A
max. 3 A
• Vertical configuration
Up to 40 C max. 4 A
Total current of the outputs (per
group) with series diode
• Horizontal configuration
Up to 40 C
Up to 60 C
max. 3 A
max. 2 A
• Vertical configuration
Up to 40 C max. 3 A
Isolation
• Between channels and
backplane bus
Yes
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. 70 mA
max. 90 mA
Power dissipation of the module typ. 5 W
Status, Interrupts, Diagnostics
Status display Green LED per channel
Interrupts
• Diagnostic interrupt Parameters can be
assigned
Diagnostic functions
• Group error display
• Channel error display (F)
• Diagnostics information
readable
Parameters can be
assigned
Red LED (SF)
Red LED (F) per
channel
Possible
Data for Selecting an Actuator
Output voltage
• At signal “1”
Without series diode
With series diode
min. L + (–0.8 V)
min. L + (–1.6 V)
Output current
• At signal “1”
Rated value
Permitted range
0.5 A
10 mA to 0.6 A
1)
• At signal “0”
(leakage current)
max. 0.5 mA
Output delay (for resistive load)
• At “0” to “1”
• At “1” to “0”
max. 180 s
max. 245 s
Load resistor range 48  to 3 k
Lamp load max. 5 W
Parallel connection of
2 outputs
• For redundant
actuation of a load
Output with series
diode only, must have
the same reference
potential
• To increase performance Not possible
Triggering a digital input Possible
1 binary input
according to
IEC 61131, Type 2;
Type 1 with disabled
open-circuit monitoring
Switch rate
• For resistive load
• Inductive load according to
IEC 947-5-1, 13 DC
• For lamp load
max. 100 Hz
max. 2 Hz
max. 10 Hz
Limit (internal) of the inductive
circuit interruption voltage up
typ. L + (–45 V)
Short-circuit protection of the
output
Yes, electronic
• Threshold on typ. 0.75 A to 1.5 A
1)
5 mA to 0.6 A with disabled open-circuit
monitoring