Siemens PM-D F DC24V PROFIsafe

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Fail-Safe Modules

7.6 EM 4 F-DI/3 F-DO DC24V PROFIsafe digital electronic module

ET 200S Distributed I/O System - Fail-Safe Modules

148 Installation and Operating Manual, 08/2008, A5E00103686-07

Fault detection if ...

Short-circuit DI0 with DI5 No No No

P short-circuit DI0 Yes No No

M short-circuit DI0 Yes* Yes* No

Discrepancy error Yes Yes Yes

P-short circuit in sensor

supply

Yes No No

M-short-circuit in sensor

supply or defective

Yes Yes Yes

Short-circuit SS with DI0 No No No

Supply voltage fault Yes Yes Yes

*: Fault is detected only in case of signal corruption. In other words, the signal read differs from the

sensor signal (discrepancy error). If there is no signal corruption with respect to the sensor signal,

fault detection is not possible and is not required from a safety standpoint.

WARNING

If the short-circuit test is disabled or cannot be enabled, the wiring between the sensor and

input channel must be short circuit-proof.

Siemens PM-D F DC24V PROFIsafe - Page 148