Digital Modules
4-75
S7-400, M7-400 Programmable Controllers Module Specifications
A5E00069467-07
Technical Specifications of the SM 422; DO 32 24 VDC/0.5 A
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
Total current of the outputs (per
group)
Up to 40 C
Up to 60 C
Max. 4 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. 200 mA
Max. 120 mA
Power dissipation of the
module Typ. 8 W
Status, Interrupts, Diagnostics
Status display Green LED per
channel
Interrupts
•Diagnostic Interrupt
•Hardware interrupt
Parameters can be
assigned
Parameters can be
assigned
Diagnostic functions
•Monitoring of the load
voltage Yes
•Group error display
– For internal fault Red LED (INTF)
– For external fault Red LED (EXTF)
•Diagnostic information
readable Yes
Monitoring for
•Short circuit > 1 A (typ.)
•Wire break < 0.15 mA
Substitute value can be applied Yes
Data for Selecting an Actuator
Output voltage
•At signal “1” Min. L + (– 0.8 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. 0.5 mA
Load resistor range 48 to 4 k
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
•For lamp load Max. 2 Hz
Limit (internal) of the inductive
circuit interruption voltage up to Typ. L + (– 45 V)
Short-circuit protection of the
output
•Threshold on
Electronically cyclic
Typ. 0.75 A to 1.5 A