The fail-safe modules for the modular Simatic ET 200M I/O station offer improved the performance as well as increased the functionality. The Simatic modules ET 200M 24 F-DI, ET 200M 8 F-DO and ET 200M 10 F-DO are able to meet the requirements of the safety levels SIL 3/ Cat. 4 / PL e in mixed operation with standard modules, without the need of a safety protector. These modules have been equipped with PROFIsafe-Profi l 2.0, enabling them to be used in Profi net networks also in connection with PN/DP couplers. An acknowledgement is possible after a voltage drop. The narrow 40mm design is now suitable for a cable length of 1,000m, offers P/P switching (current sourcing) and has a switched current of two amperes per channel. Furthermore, each new module comes with the ‘last valid’ function, i.e. which provides the last valid state, and ‘energize to trip’ functions, for example, to provide the last value. Such functions are especially advantageous in fi re and gas applications. In the case of module ET 200M 8 F–DO the maximum cable length is 200m.
Modular I/O station
