Siemens SIMATIC S5-115F - Page 305

Rules Governing the Use of the S5-115F S5-115F Manual
Figure 10-10. Type 3 DI, Safety-Related, Non-Intermittent: Two-Channel, Deactivatable Sensors
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Subunit A Subunit B
Sensor
DI
430 - 7LA
434 - 7LA
435 - 7LC
436 - 7LC
DI
430 - 7LA
434 - 7LA
435 - 7LC
436 - 7LC
451 - 7LA
458 - 7LA
458 - 7LB
456 - 7LB
CH DQ
a a a a
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Sensor
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Since the active sensor signal is non-intermittent, it must be interrupted in order to check the DIs.
For this purpose, a check DQ is used as the sensor supply. This check DQ can be plugged into
subunit A or B.
10-22 EWA 4NEB 811 6148-02