Digital Modules
3-83
Programmable Logic Controllers S7-300 Module Data
A5E00105505-03
Technical specifications of the SM 322; DO 8 x 48-125 VDC/1.5 A
Dimensions and Weight
Dimensions W x H x D
(in millimeters)
40 x125 x117
Weight Approx. 250 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+ 48 VDC to 125 VDC
• Reverse polarity protection Yes, by means of
fuse
1)
Total current of the outputs
(per group)
• Horizontal configuration
Up to 40 C
Up to 50 C
Up to 60 C
max. 6 A
max. 4 A
max. 3 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
146 VDC / 132 VAC
Insulation tested with 1500 VAC
Current consumption
• From the backplane bus
• From the load voltage L+
(no load)
max. 100 mA
max. 2 mA
Power dissipation of the module typ. 7.2 W
Status, Interrupts, Diagnostics
Status display Green LED per channel
Interrupts None
Diagnostic functions
• Group error display Red LED (SF)
2)
Data for Selecting an Actuator
Output voltage
• At “ 1” signal min. L + (–1.,2 V)
Output current
• At “ 1” signal
Rated value
Permitted range
1.5 A
10 mA to 1.5 A
• Permitted surge current max. 3 A for 10 ms
• For ”0” signal
(leakage current)
max. 0.5 mA
Output delay (for resistive load)
• From “ 0” to “1”
• At “1” to “0”
max. 2 ms
max. 15 ms
Lamp load max. 15 W at 48 V
max. 40 W at 125 V
Parallel connection of
2 outputs
• For redundant actuation 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
• For inductive load
• For lamp load
max. 25 Hz
max. 0.5 Hz
max. 10 Hz
Limit (internal) of the in
ductive circuit interruption
voltage up
typ. M (–1V)
Short-circuit protection of the
output
• Threshold on
Yes, electronic
3)
typ. 4.4 A
Replacement fuses Fuse 6.,3 A/250 V,
quick blow, 5 x 20 mm
• Schurter
• Wickman
SP0001.1012
194-1630-0
Fuse carrier
• Wickman 653 0000 040
1)
The fuses on this module are merely
supplementary fuses. External overcurrent
protection (suitable for branch circuits conforming
to the local regulations for electrical engineering)
is required in the supply cables of the load circuit.
2)
Potential errors are:
- No load voltage
- Fuse defective
- Output overloaded
3)
If an overload condition is detected, the output is
inhibited for approximately 2.4 s.
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