SUPREMATouch
72
Special conditions to comply with the requirements of IEC 61508
MSA
US
Additional conditions to fulfill the requirements of IEC 61508 for a certain SIL
In addition to the general conditions the following criteria have be considered for a specified SIL:
SIL 1:
- A configuration 1 has to be installed in accordance with this chapter.
SIL 2:
- A configuration 1 has to be installed in accordance with this chapter.
By installing a configuration 2 in accordance with this chapter and using the MRO 8 and/or
MRO 8 TS modules the contacts of the relays for the same alarm [Alarm A and Alarm B] of
subsystem A and B have to be interconnected serially or processed safety-related.
[By using the MRO 16 TS modules this interconnecting is already internally realized.]
SIL 3:
- A redundant configuration 3 has to be installed in accordance with this chapter.
Two independent sensors have to be used in the same area.·The sensors in the same area
have to be connected to different MAI 20 [analogue input] modules.
By installing a configuration 3 in accordance with this chapter and using the MRO 8 and/or
MRO 8 TS modules the contacts of the relays for the same alarm [Alarm A and Alarm B] of
subsystem A and B have to be interconnected serially or processed safety-related.
[By using the MRO 16 TS modules this interconnecting is already internally realized.]
Permitted system expansions over CAN BUS
Fig. 41 System expansions with CAN BUS and single-channel-configuration
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