Comparison of distributed I/O systems for SIMATIC PCS 7

I/O system	ET 200M	ET 200iSP	ET 200SP	ET 200S	ET 200pro
Design
Degree of protection	IP20	IP30	IP20	IP20	IP65/IP66/IP67
Design	Modular	Modular	Discretely scalable	Bit modular, expandable block	Modular
Assembly	Mounting rail	Mounting rail	Standard mounting rail	Standard mounting rail	Mounting rail
Connection system for sensors/actuators	Single-wire connection Spring-loaded/screw-type connections, FastConnect, TopConnect	Multi-wire connection Spring-loaded/screw-type connections	Single/multi-conductor connection Push?in terminals	Multi-wire connection Spring-loaded/screw-type connections, FastConnect	M8, M12, M23
Special applications
Safety engineering	?	?	–	?	?
For use in hazardous areas	Zones 2, 22	Zones 1, 21	Zones 2, 22	Zones 2, 22	–
Increased availability	Switched, redundant	Switched, redundant	–	–	–
Temperature range	0 … +60 °C1)	-20 … +70 °C	0 … +60 °C1) (horizontal)	0 … +60 °C1)	-25 … +55 °C
Vibration resistance (continuous)	1 g	1 g	Up to 5 g	2 g	5 g (module-dependent)
Communication
PROFIBUS (Cu/FO)	? / – (12 Mbps)	? / – (1.5 Mbps)	– / –	? / ? (12 Mbps)	? / ? (12 Mbps)
PROFINET (Cu/FO)	? / –	– / –	? / ?	– / –	– / –
System functions
Permanent wiring	? (plugging and removal)	?	?	?	–
Hot swapping	? (with active backplane bus)	?	?	?	?
Expansion/ configuration during ongoing operation	? / ?	? / ?	– / –	? / –	– / –
Diagnostics (module-dependent)	Channel-discrete	Channel-discrete	Channel-discrete	Channel-discrete	Channel-discrete
functions
Digital channels	?	?	?	?	?
Analog channels	?	?	?	?	?
incl. HART	?	?	?	–	–
Motor starters	–	–	–	?	–
Pneumatic interface	–	?	–	–	–
Technological functions	Counting/measuring, controlling, weighing	Counting, frequency measuring	–	Counting/measuring	–

¹⁾ Also available as a SIPLUS component for extended temperature range -25/-40 … +60/+70 °C and corrosive atmosphere/condensation (see details at http://www.siemens.com/siplus)

Integration of process I/O in the hazardous area

Process I/O in explosive gas and dust atmospheres

The figure shows the possible applications for the SIMATIC PCS 7 process I/O with consideration of different environmental conditions.

Field devices on the PROFIBUS PA or FOUNDATION Fieldbus H1

Field devices located in Ex zones 0, 1, 2, 20, 21 or 22 can be integrated in SIMATIC PCS 7 via various active field distributors on the PROFIBUS PA or FOUNDATION Fieldbus H1. The active field distributor AFDiSD is required for field devices in Ex zones 0, 1, 20 or 21.

ET 200iSP distributed I/O

ET 200iSP remote I/O stations suitable for gas/dust atmospheres can be installed directly in the 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.

ET 200M, ET 200SP and ET 200S distributed I/O

ET 200M, ET 200SP and ET 200S remote I/O stations can be used in Ex zone 2 or 22 as well as in non-hazardous areas. The actuators/sensors can also be positioned in Ex zone 1 or 21. Special Ex I/O modules are available for this in the ET 200M product range.

ET 200pro distributed I/O

ET 200pro remote I/O stations are designed for use in non-hazardous areas.

Intrinsically-safe operator panel

An intrinsically-safe operator panel can be used in hazardous areas, zone 1, 2, 21 or 22, if required. For further information on this operator panel, see under SIMATIC HMI Thin Client Ex in the Catalog "Add-ons for the SIMATIC PCS 7 process control system", Section "Operator control and monitoring".