The ET 200iSP is a modular, intrinsically-safe I/O system with IP30 degree of protection which can be operated in gas and dust atmospheres at ambient temperatures from -20 to +70 °C. It is optimized for use with SIMATIC PCS 7 and SIMATIC S7, but can also be integrated in other systems such as SIMATIC S5 per GSD file.

In accordance with ATEX directive 2014/34/EU, the ET 200iSP remote I/O stations can be installed directly in Ex Zones 1, 2, 21 or 22 as well as in non-hazardous areas. The intrinsically-safe sensors, actuators and HART field devices can also be located in zone 0 or 20 if necessary.

The modular design of the ET 200iSP makes it possible to optimally adapt the remote I/O stations to the respective automation task through individual configuration and flexible expansion. To increase plant availability, the pressure-encapsulated power supply and the intrinsically-safe PROFIBUS DP connection (RS 485-iS) of the stations can also be of redundant design.

The modern architecture with hardwiring and automatic slot coding supports pre-wiring without the electronic modules, simple and reliable hot swapping of individual modules without a fire certificate as well as configuration in run (CiR).

In addition to analog and digital I/O modules for the automation of technological functions of the process (Basic Process Control), the range of electronic modules also includes fail-safe I/O modules for implementing safety applications. The various types of electronic module can be arranged mixed within a station. Comprehensive diagnostic options facilitate commissioning and troubleshooting.


Main components of the ET 200iSP distributed I/O system:

  • Terminal modules
    mounted on an S7‑300 rail; for connecting power supply, interface, electronics, watchdog and reserve modules and for prewiring

    • with blue screw-type or spring-loaded terminals for hazardous environments
    • with black screw-type terminals for non-hazardous environments
  • Power supply unit
    1 or 2 (redundant) power supply modules PS with pressurized enclosure for feeding 24 V DC or 120/230 V AC
  • Interface module
    1 or 2 (redundant) IM 152 interface modules for connecting the station to the PROFIBUS DP
  • Electronics modules (2/4/8 channels): Up to 32 in any combination
    • Digital electronics modules (DI, DO)
    • Analog electronics modules (AI, AO)
    • Safety-related electronics modules (F-DI, F-DO and F-AI)
    • Watchdog module
  • Accessories
    • Reserve module for reserving a slot for any electronics module
    • Terminating module (included in scope of delivery of terminal modules for the PROFIBUS interface)
    • Labeling sheets with printable labeling strips
    • Inscription labels for slot numbering


Assembly is quick and easy:

  • Latching of terminal modules onto the S7‑300 rail
  • Prewiring of process signal cables on the terminal modules using spring-loaded or screw-type connections
  • Plugging-in of power supply, interface and electronics modules without the need for additional tools

Expansion limits

The station width is 107 cm in the maximum configuration with 32 electronic modules.

The maximum number of electronics modules which can be used per station may be limited depending on the current consumption of the modules required to solve the automation task. However, up to 16 electronics modules can be used without limitation.

Stainless steel wall enclosure

If the ET 200iSP is used in a hazardous area, it must be installed in an appropriate Ex housing which at least corresponds to the IP54 degree of protection. Appropriate versions of an IP65 housing are offered in the Section “Stainless steel wall housings”.

Outstanding design features

  • Installation and testing of the wiring is possible in advance without the electronics module (independent wiring).
  • Isolation of the mechanical and electronic systems, in conjunction with the independent process wiring, permits fast and easy replacement of the electronics modules
  • Mechanical coding which is carried out when an electronics module is plugged onto a terminal module for the first time prevents the connection of incorrect replacement modules
  • Hot swapping of the power supply modules and electronics modules is possible without a fire certificate.


Distributed ET 200iSP remote I/O stations are connected to the automation systems (controllers) via the PROFIBUS DP, which can be routed intrinsically-safe into Ex‑zone 1 using an isolating transformer (RS 485‑iS coupler) as barrier. Data transfer rates of up to 1.5 Mbps are possible. The ET 200iSP remote I/O stations can be connected to the controller as DP V0 slave or DP V1 slave.

The ET 200iSP remote I/O stations are integrated into the SIMATIC PCS 7 process control system using standard driver blocks.

The existing standard diagnostics drivers process the diagnostics messages generated by internal or external faults (e.g. wire breakage or short-circuit) as well as status messages of the connected HART field devices for the host operator system and the SIMATIC PCS 7 maintenance station.

Vendor-specific information and maintenance data are saved powerfail-proof on the electronics modules.


The ET 200iSP stations can be configured and parameterized per HW Config in a SIMATIC S7/SIMATIC PCS 7 environment. Parameters of the ET 200iSP stations and the HART field devices can also be set using the process device manager, SIMATIC PDM. Routing via PROFIBUS DP enables direct access to the HART field devices on the ET 200iSP with SIMATIC PDM.

The system function CiR (Configuration in Run) is also supported for the configuration of SIMATIC PCS 7 and permits the following changes to be made to the configuration during runtime:

  • Adding of ET 200iSP stations
  • Adding modules to the ET 200iSP station
  • Re-configuration of modules
  • Parameterization of connected HART field devices with SIMATIC PDM

Software minimum requirements

  • SIMATIC PCS 7 environment: SIMATIC PCS 7 Version 6.1
  • SIMATIC S7 environment: SIMATIC STEP 7 Version 5.3+SP1 including Hardware Support Package (HSP) or SIMATIC STEP 7 (TIA Portal)
  • The latest SIMATIC PDM version is used to configure the HART field devices.

Configuration with third-party systems and old SIMATIC PCS 7/STEP 7 versions

The station design (configuration) should be published over the PROFIBUS DP network per GSD file.

Process Device Manager SIMATIC PDM is required for the configuration. It can be used to define, for example, alarm limits for analog modules, signal encoders for digital modules as well as settings for outputting analog values and HART commands for analog HART modules.

Technical specifications

ET 200iSP – general
Degree of protection IP30
Ambient temperature
Horizontal mounting position -20 … +70 °C
Other mounting positions -20 … +50 °C
Loading of media According to ISA-S71.04 severity level G1; G2; G3 (except for NH3, only level G2 in this case)
EMC Electromagnetic compatibility according to NE21
Vibration resistance 0.5 g continuously, 1 g periodically
Approvals, standards
ATEX II 2 G (1) GD
I M2
Ex de [ia/ib] IIC T4
Ex de [ia/ib] I
IECEx Zone 1 Ex de [ia/ib] IIC T4
INMETRO Zone 1 BR-Ex de [ia/ib] IIC T4
cFMus Class I, II, III NI Division 2,
Groups A, B, C, D, E, F, G T4
AIS Division 1,
Groups A, B, C, D, E, F, G
Class I Zone 1, AEx de [ia/ib] IIC T4
cULus Class I, II, III Division 2,
Groups A, B, C, D, E, F, G T4
providing int. safe circuits for Division 1,
Groups A, B, C, D, E, F, G
Class I Zone 1, AEx de [ia/ib] IIC T4
NEPSI Ex de ib[ia] IIC T4
Ex de [ia/ib] IIC T4
PROFIBUS EN 50170, Volume 2
IEC IEC 61131, Part 2
CE In accordance with ATEX directive 2014/34/EU, EMC Directive 2014/30/EU and LVD-guideline 2014/35/EU
KCC Korea Certification
Marine approval Classification companiesABS (American Bureau of Shipping)BV (Bureau Veritas)DNV (Det Norske Veritas)GL (Germanischer Lloyd)LRS (Lloyds Register of Shipping)Class NK (Nippon Kaiji Kyokai)

I/O systems for in cabinets
I/O systems for in cabinets
I/O systems for in the field
I/O systems for in the field
Industrial PC's
Industrial PC's
Automatic door controls
Automatic door controls

Did you know, we are an entrusted Siemens approved partner?