Siemens ST PCS 7 Benutzerhandbuch
Process I/O
ET 200iSP distributed I/O
Introduction
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Siemens ST PCS 7 · November 2007
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Overview
The ET 200iSP is a modular, intrinsically-safe I/O system in IP30
degree of protection, and can be configured with up to
32 electronics modules (4/8-channel). The range of electronics
modules covers:
• 8-channel digital input module DI, can also be used as
• 8-channel digital input module DI, can also be used as
counter or frequency meter
• 4-channel digital output module DO with external actuator
switch-off via High or Low signal (H/L switch-off)
• 4-channel analog input modules AI for temperature measure-
ments with resistance thermometer or thermocouple
• 4-channel analog input modules AI for connection of 2/4-wire
transmitters with or without HART functionality
• 4-channel analog output module AO for connection of field de-
vices with or without HART functionality
The ET 200iSP suitable for gas and dust atmospheres according
to the ATEX directive 94/9/EU can be installed directly in the Ex
zones 1, 2, 21 or 22 as well as in non-hazardous areas. The in-
trinsically-safe sensors, actuators and HART field devices can
also be located in zone 0 or 20 if necessary.
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Design
The ET 200iSP consists of the following components:
• Carrier system with terminal modules for prewiring, and also
• Carrier system with terminal modules for prewiring, and also
for inserting power supply, interface and electronics modules,
mounted on an S7-300 rail
• 1 or 2 (redundant) power supply modules PS with pressurized
enclosure
• 1 or 2 (redundant) IM 152 interface modules for PROFIBUS DP
• Up to 32 electronics modules (4/8-channel) in any combina-
• Up to 32 electronics modules (4/8-channel) in any combina-
tion, including watchdog module
• Terminating module (included in scope of delivery of terminal
modules for the PROFIBUS interface)
Assembly is quick and easy:
• Latching of terminal modules onto the S7-300 rail
• Prewiring of process signal cables on the terminal modules
• 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 mod-
ules without the need for additional tools
The maximum number of electronics modules which can be
used per station may be limited depending on the current con-
sumption of the modules required to solve the automation task.
However, up to 16 electronics modules can be used without lim-
itation.
If the ET 200iSP is used in a hazardous area, it must be installed
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 hous-
ing are offered in the Section "Stainless steel wall housings".
Exceptional features of the ET 200iSP architecture
• Installation and testing of the wiring is possible in advance
without the electronics module
• Isolation of the mechanical and electronic systems, in con-
junction 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
© Siemens AG 2007