2-4
PFH
This section gives the PFH (PFH
D
) values of the NX-series Safety CPU Unit and the Safety I/O Units.
Precautions for Correct Use
Go to the following URL for the most recent PFH values: http://www.ia.omron.com/support/
sistemalibrary/index.html
Additional Information
The NX-series Safety Control Unit is a Type B subsystem that is defined by IEC 61508 with
HFT = 1 and SFF > 90%.
l
Safety CPU Unit
Model PFH
NX-SL3300 3.1E-10
NX-SL3500 3.0E-10
NX-SL5500 5.0E-11
NX-SL5700 5.0E-11
l
Safety Input Unit
Model PFH
NX-SID800
1.5E-9
*1
4.3E-10
*2
NX-SIH400
1.4E-9
*1
3.1E-10
*2
*1. This value includes PFH value of FSoE connection.
*2. This value does not include PFH value of FSoE connection.
l
Safety Output Unit
Model PFH
NX-SOD400
1.6E-9
*1
5.5E-10
*2
NX-SOH200
1.4E-9
*1
3.6E-10
*2
*1. This value includes PFH value of FSoE connection.
*2. This value does not include PFH value of FSoE connection.
2 Specifications
2 - 41
NX-series Safety Control Unit User's Manual (Z930)
2-4 PFH
2
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