Digital Modules
4-61
S7-400, M7-400 Programmable Controllers Module Specifications
A5E00069467-07
Technical Specifications of the SM 422; DO 16 24 VDC/2 A
Programming package
Associated programming
package
As of STEP 7 V 2.0
Dimensions and Weight
Dimensions W H D
(in millimeters)
25 290 210
Weight Approx. 600 g
Data for Specific Module
Number of outputs 16
Length of cable
• Unshielded
• Shielded
600 m
1000 m
Voltages, Currents, Potentials
Power rated voltage of the
electronics L+
24 VDC
Rated load voltage L+ 24 VDC
Aggregate current of
the outputs (two outputs
per supply group)
Up to 40 C
Up to 60 C
Max. 3 A
Max. 2 A
Isolation
• Between channels and
backplane bus
Yes
• Between the channels
In groups of
Yes
8
Permitted potential difference
• Between the different
circuits
75 VDC / 60 VAC
Insulation tested with
• Channels against
backplane bus and load
voltage L+
500 VDC
• Between the outputs of the
different groups
500 VDC
Current consumption
• From the backplane bus
• Power supply and load
voltage L+ (no load)
Max. 160 mA
Max. 30 mA
Power dissipation of the
module
Typ. 5 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+ (-0,5 V)
Output current
• At signal “1”
Rated value 2A
Permitted range 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. 1 ms
• At “1” to “0” Max. 1 ms
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
• For inductive load to IEC
947-51, DC 13
100 Hz
0.2 Hz at 1 A
0.1 Hz at 2A
• For lamp load Max. 10 Hz
Limit (internal) of the inductive
circuit interruption voltage up to
Max. -30 V
Short-circuit protection
of output
1
• Threshold on
Electronically cyclic1)
2.8 to 6A
1)
A supply group always consists of two adjacent
channels starting with channel 0. Channels 0 and 1, 2
and 3 and so on up to 14 and 15 therefore form one
supply group.
2)
Following a short circuit, reclosing under a full load is
not guaranteed. To prevent this, you can do one of the
following things:
• Change the signal at the output
• Interrupt the load voltage of the module, or
• Briefly disconnect the load from the output
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