Rockwell Automation AADvance Controller Solutions Handbook - Manual (Page 52)

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2-2 Document: 553631
(ICSTT-RM447J_EN_P) Issue: 09:
Solutions Handbook (AADvance Controller)
SIL2 Fail-safe Architecture
The following is a simplex fail-safe SIL2 architecture, where I/O modules operate in
1oo1D under no fault conditions and will fail-safe on the first detected fault. The
processor module operates in 1oo1D and will degrade to fail safe on the first detected
fault.
Note: A simplex configuration can only be used for "low demand"
Table 5: Modules for SIL2 Fail-Safe Architecture
Position Module Type
I/P A T9401/2 Digital Input Module, 24V dc, 8/16 Channel +
T9801 Digital Input TA, 16 Channel, Simplex. or
T9431/2 Analogue Input Module,
8/16 Channel +
T9831 Analogue Input TA, 16 Channel, Simplex
T9300 I/O Base Unit
CPU A 1 x T9110 Processor Module, T9100 Processor Base
Unit,
O/P A T9451 Digital Output Module, 24V dc, 8 Channel,
isolated +
T9851 Digital Output TA, 24V dc 8 Channel, Simplex