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Siemens Simatic S7-400 User Manual

Page 197

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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

W

to 4 k

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

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

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