SIEMENS EXM 438-1 input/output expansion

Overview

  • Optional plug-in expansion module for the FM 458-1 DP basic module
  • Used to read in and output time-critical signals
  • With digital and analog inputs/outputs
  • Incremental and absolute encoders can be connected
  • 4 high-resolution analog outputs
  • Fan-free operation up to 40 °C
Product No. / Product Description Listprice / Your price
6DD1607-0CA1
SIMATIC S7-400, EXM 438-1 I/O extension for FM 458 4x analog outputs 16-bit EXM 438-1 not spare part-compatible for EXM438

Application

The optional EXM 438-1 input/output expansion module permits direct exchange of signals between the FM 458-1 DP basic module and the installation. The EXM 438-1 is able to record and convert the signals so rapidly that an up-to-date value is available for the FM 458-1 DP in every cycle (from 100 µs).


Design

  • 5 analog inputs
  • 4 analog outputs 12 bit
  • 4 analog outputs 16 bit
  • 16 digital inputs
  • 8 digital outputs
  • 8 incremental encoders, with synchronization capability
  • 4 absolute encoders

A fan is required at ambient temperatures above 40 °C.

Accessories
  • SU13 interface module with SC63 cable for all signals without signal conversion.
  • SB10, SB71, SU12 interface modules with SC62 cable for digital outputs
  • SB10, SB61, SU12 interface modules with SC62 cable for digital inputs

Function

Mode of operation

Coupling to FM 458-1 DP

The EXM 438-1 is connected directly to the FM 458-1 DP basic module via the internal bus. This makes the connection between the FM 458-1 DP and the I/O devices very fast. Only the power supply is obtained from the backplane bus of the SIMATIC rack, data transfer is not handled here. Access to the I/O is via configurable function blocks.

Configuration

Configuration instead of programming with CFC

The FM 458-1 DP is configured using the well-known software tools STEP 7 and CFC (Continuous Function Chart) which are also used to program the SIMATIC S7-400 controller.

CFC is an intuitive Windows-based program that is easy to learn. The CFC has been expanded to include the function blocks and the optimized operating system using the D7-SYS add-on software package.


Technical specifications

Article number

6DD1607-0CA1

EXM 438-1 I/O EXPENSION

Supply voltage

Rated value (DC)

  • ● 5 V DC

Yes

  • ● 24 V DC

Yes; to be set up externally

Input current

Current consumption, typ.

1.5 A

Encoder supply

Type of output voltage

about 14 V (non-isolated)

Short-circuit protection

Yes; Electronic

Output current

  • ● Rated value

100 mA

Power loss

Power loss, typ.

7.5 W

Hardware configuration

Slots

  • ● required slots

1

Digital inputs

Number of digital inputs

16

Input voltage

  • ● Rated value (DC)

24 V

  • ● for signal “0”

-1 to +6 V or input open

  • ● for signal “1”

+13 to +33V

Input current

  • ● for signal “0”, max. (permissible quiescent current)

0 mA

  • ● for signal “1”, typ.

3 mA

Input delay (for rated value of input voltage)

for standard inputs

  • — at “0” to “1”, max.

200 µs

Digital outputs

Number of digital outputs

8

Short-circuit protection

Yes; electronic/thermal

  • ● Response threshold, typ.

250 mA

Limitation of inductive shutdown voltage to

Supply voltage +1 V

Output voltage

  • ● for signal “0”, max.

3 V

  • ● for signal “1”, max.

Supply voltage -2.5 V

Output current

  • ● for signal “1” rated value

50 mA

  • ● for signal “1” permissible range for 0 to 40 °C, min.

100 mA

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

20 µA

  • ● Total switching current

80% at 50 °C all outputs 50 mA

Output delay with resistive load

  • ● “0” to “1”, max.

15 µs