SIEMENS S7-300 Ex analog output modules Technical specifications

Ex analog output modulesEx analog output modules

  • Analog outputs for signals from the Ex field
  • For the connection of intrinsically safe analog equipment from the Ex field
  • 4 analog outputs in 4 channel modules (single-channel isolation)
  • Diagnostics and diagnostics alarm programmable

The Ex analog output modules have the following mechanical features:

  • Compact configuration;
    the rugged plastic housing contains:

    • A shared red group fault LED for all circuits
    • One red LED each per channel for displaying channel-specific faults/errors, e.g., wire break or load break
    • Slot for front connector or cable guide, protected by the front cover
    • Labeling area on the front cover.
  • Easy installation:
    The module is mounted on the DIN rail and connected to the adjacent modules via bus connectors. There are no slot rules; the addresses of the inputs are predetermined by the slot.
  • User-friendly wiring:
    The modules are wired by means of a plug-in front connector. When they are first plugged in, a coding element clicks into place so that the connector will only fit into modules of the same type. The front connector contains a special cable guide to cover the module’s 24 V load power supply. When the module is replaced, the front connector can be used in its fully-wired state for the new module of the same type.

Ex analog output modules convert digital signals from the programmable controller into the analog signals required for the process.


Ex analog output modules are used for the connection of intrinsically-safe analog equipment from the Ex field.

Ex analog output modules Technical specifications

Article number



Supply voltage

Load voltage L+

  • ● Rated value (DC)

24 V

  • ● Reverse polarity protection


Input current

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

200 mA

from backplane bus 5 V DC, max.

80 mA

Power loss

Power loss, typ.

4 W

Analog outputs

Number of analog outputs


Voltage output, short-circuit protection


Voltage output, short-circuit current, max.

70 mA

Current output, no-load voltage, max.

14 V

Output ranges, current

  • ● 0 to 20 mA


  • ● 4 mA to 20 mA


Connection of actuators

  • ● for current output two-wire connection


Load impedance (in rated range of output)

  • ● with current outputs, max.

500 Ω

Cable length

  • ● shielded, max.

200 m

Analog value generation for the outputs

Integration and conversion time/resolution per channel

  • ● Resolution with overrange (bit including sign), max.

15 bit

  • ● Basic conversion time (ms)

2.5 ms


Operational error limit in overall temperature range

  • ● Current, relative to output range, (+/-)

0.55 %

Basic error limit (operational limit at 25 °C)

  • ● Current, relative to output range, (+/-)

0.2 %

Interrupts/diagnostics/status information

Diagnostic functions


Diagnostic messages

  • ● Diagnostic information readable


  • ● Overrange


  • ● Wire-break in actuator cable


Diagnostics indication LED

  • ● Group error SF (red)


  • ● Channel fault indicator F (red)


Ex(i) characteristics

Module for Ex(i) protection


Maximum values of output circuits (per channel)

  • ● Co (permissible external capacity), max.

850 nF

  • ● Io (short-circuit current), max.

70 mA

  • ● Lo (permissible external inductivity), max.

6.6 mH

  • ● Po (power of load), max.

440 mW

  • ● Uo (output no-load voltage), max.

14 V

Potential separation

Potential separation analog outputs

  • ● Potential separation analog outputs


Permissible potential difference

between the outputs (UCM)

60 V DC/30 V AC when used in the hazardous area; 400 V DC/250 V AC when used in NON-hazardous area

Between the outputs and MANA (UCM)

60 V DC/30 V AC when used in the hazardous area; 400 V DC/250 V AC when used in NON-hazardous area

Standards, approvals, certificates

Use in hazardous areas

  • ● Type of protection acc. to EN 50020 (CENELEC)

[EEx ib] IIC

  • ● Type of protection acc. to FM

Class I, Division 2, Group A, B, C, D T4

  • ● Test number PTB


Ambient conditions

Ambient temperature during operation

  • ● max.

60 °C

Connection method

required front connector



Weight, approx.

280 g