Digital Modules
4-72 S7-400, M7-400 Programmable Controllers Module Specifications
A5E00069467-07
Technical Specifications of the SM 422; DO 32 24 VDC/0.5 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 32
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 (per supply group
of 8 outputs)
Up to 40 C
Up to 60 C
Max. 4 A
Max. 2 A
Isolation
•Between channels and
backplane bus Yes
•Between the channels No
Permitted potential difference
•Between the different
circuits 75 VDC / 60 VAC
Insulation tested with
•Channels against
backplane bus and load
voltage L+
500 VDC
•Load voltage L+ against
backplane bus 500 VDC
Current consumption
•From the backplane bus
•Power supply and load
voltage L+ (no load)
Max. 200 mA
Max. 30 mA
Power dissipation of the
module Typ. 4 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+ (-0,3 V)
Output current
•At signal “1”
Rated value
Permitted range
0.5 A
5 mA to 0.6 A
•At signal “0” (leakage
current) Max. 0.3 mA
Output delay (for resistive
load)
•From “ 0” to “1” Max. 1 ms
•At “1” to “0” Max. 1 ms
Load resistor range 48 to 4 k
Lamp load Max. 5 W
Parallel connection of 2
outputs
•For redundant triggering of
a load Possible (only outputs
of the same group)
•To increase performance Possible (only outputs
of the same group)
Triggering a digital input Possible
Switch rate
•For resistive load Max. 100 Hz
•For inductive load
to IEC 947-5-1, DC 13 Max. 2 Hz at 0.3 A
Max. 0.5 Hz at 0.5 A
•For lamp load Max. 10 Hz
Limit (internal) of the inductive
circuit interruption voltage up
to
Typ. – 27 V
Short-circuit protection of the
output
•Threshold on
Electronically cyclic
Typ. 0.7 A to 1.5 A
1) A supply group always consists of eight adjacent
channels starting with channel 0. Channels 0 to 7, 8 to
15, 16 to 23 and 24 to 32 therefore form one supply
group.