SIEMENS SM 323/SM 327 digital input/output modules

SM 323/SM 327 digital input/output modules Overview

  • Digital inputs and outputs
  • For connection of switches, 2-wire proximity switches (BEROs), solenoid valves, contactors, low-power motors, lamps and motor starters

SM 323/SM 327 digital input/output modules

Product No. / Product Description Listprice / Your price
6ES7323-1BH01-0AA0
SIMATIC S7-300, Digital module SM 323, isolated, 8DI and 8DO, 24 V DC, 0.5 A Total current 2A, 1x 20-pole
6ES7323-1BL00-0AA0
SIMATIC S7-300, Digital module SM 323, isolated, 16 DI and 16 DO, 24 V DC, 0.5 A, Total current 4A, 1x 40-pole
6ES7327-1BH00-0AB0
SIMATIC S7-300, Digital module SM 327, isolated, 8DI and 8DX, 24 V DC, 0.5 A 1x 20-pole; 8DX by individual channels Can be parameterized as DI or DO
SM 323/SM 327 digital input/output modules

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SM 323/SM 327 digital input/output modules

Application

Digital input/output modules are suitable for the connection of:

  • Standard switches and two-wire proximity switches (BERO)
  • Solenoid valves, contactors, low-power motors, lamps and motor starters

Design

The digital input/output module features the following mechanical characteristics:

  • Compact design:
    • Green LEDs for indicating the signal states on the inputs/outputs,
    • Plug-in option for the front connector
    • Labeling field on the front door
    • Connector pin assignment for the wiring on the inside of the front door.
  • Simple installation:
    There are no slot rules, the addresses of the outputs are determined by the slot.
    When used in ET 200M in combination with active bus modules, hot swapping is possible without any reaction.
  • User-friendly wiring

SM 323/SM 327 digital input/output modules Function

The digital input/output modules convert

  • the level of the external digital signals from the process to the internal signal level of the controller and
  • the internal signal level of the controller to the external signal level required by the process.

The SM 327 is an additional finely scalable IO module. It has a total of 16 channels, whereby 8 channels are permanently defined and a further 8 channels can be used individually as inputs or outputs. This hybrid module can therefore be flexibly implemented for any combinations.

SM 323/SM 327 digital input/output modules Technical specifications

Article number

6ES7323-1BH01-0AA0

6ES7323-1BL00-0AA0

6ES7327-1BH00-0AB0

SM323, 8DI/8DO, DC24V, 0,5A

SM323, 16DI/DO, DC24V, 0,5A

SIMATIC S7-300, DIGITAL MODULE

Supply voltage

Load voltage L+

  • ● Rated value (DC)

24 V

24 V

24 V

  • ● permissible range, lower limit (DC)

20.4 V

20.4 V

20.4 V

  • ● permissible range, upper limit (DC)

28.8 V

28.8 V

28.8 V

Input current

from load voltage L+ (without load), max.

40 mA

80 mA

20 mA

from backplane bus 5 V DC, max.

40 mA

80 mA

60 mA

Power loss

Power loss, typ.

3.5 W

6.5 W

3 W

Digital inputs

Number of digital inputs

8

16

8; 8 hard-wired, 8 others individually parameterizable

Input characteristic curve in accordance with IEC 61131, type 1

Yes

Yes

Yes

Number of simultaneously controllable inputs

horizontal installation

  • — up to 40 °C, max.

16

  • — up to 60 °C, max.

8

8

16

vertical installation

  • — up to 40 °C, max.

8

16

16

Input voltage

  • ● Type of input voltage

DC

DC

DC

  • ● Rated value (DC)

24 V

24 V

24 V

  • ● for signal “0”

-30 to +5V

-30 to +5V

-30 to +5V

  • ● for signal “1”

13 to 30V

13 to 30V

+15 to +30V

Input current

  • ● for signal “1”, typ.

7 mA

7 mA

6 mA

Input delay (for rated value of input voltage)

for standard inputs

  • — at “0” to “1”, min.

1.2 ms

1.2 ms

1.2 ms

  • — at “0” to “1”, max.

4.8 ms

4.8 ms

4.8 ms

  • — at “1” to “0”, min.

1.2 ms

1.2 ms

1.2 ms

  • — at “1” to “0”, max.

4.8 ms

4.8 ms

4.8 ms

Cable length

  • ● shielded, max.

1 000 m

1 000 m

1 000 m

  • ● unshielded, max.

600 m

600 m

600 m

Digital outputs

Number of digital outputs

8

16

8; can also be parameterized individually as DI

Short-circuit protection

Yes

Yes

Yes

  • ● Response threshold, typ.

1 A

1 A

1 A

Limitation of inductive shutdown voltage to

L+ (-53 V)

L+ (-48 V)

L+ (-54 V)

Controlling a digital input

Yes

Yes

Yes

Switching capacity of the outputs

  • ● on lamp load, max.

5 W

5 W

5 W

Load resistance range

  • ● lower limit

48 Ω

48 Ω

48 Ω

  • ● upper limit

4 kΩ

4 kΩ

4 kΩ

Output voltage

  • ● for signal “1”, min.

L+ (-0.8 V)

L+ (-0.8 V)

L+ (-1.5 V)

Output current

  • ● for signal “1” rated value

0.5 A

0.5 A

0.5 A

  • ● for signal “1” permissible range, min.

5 mA

5 mA

5 mA

  • ● for signal “1” permissible range, max.

0.6 A

0.6 A

0.6 A

  • ● for signal “1” minimum load current

5 mA

5 mA

  • ● for signal “0” residual current, max.

0.5 mA

0.5 mA

0.5 mA

Output delay with resistive load

  • ● “0” to “1”, max.

100 µs

100 µs

350 µs

  • ● “1” to “0”, max.

500 µs

500 µs

500 µs

Parallel switching of two outputs

  • ● for uprating

No

No

No

  • ● for redundant control of a load

Yes; only outputs of the same group

Yes; only outputs of the same group

Yes; only outputs of the same group

Switching frequency

  • ● with resistive load, max.

100 Hz

100 Hz

100 Hz

  • ● with inductive load, max.

0.5 Hz

0.5 Hz

0.5 Hz

  • ● on lamp load, max.

10 Hz

100 Hz

10 Hz

Total current of the outputs (per group)

horizontal installation

  • — up to 40 °C, max.

4 A

4 A

4 A

  • — up to 60 °C, max.

4 A

3 A

3 A

vertical installation

  • — up to 40 °C, max.

4 A

2 A

2 A

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