SSP North AB
30/08/2018
Manual V2f
33
-
Double conductor input PFH-d: 4.60 x 10
-9
-
Logic: PFH-d: 2.39 x 10
-9
(including power supply)
-
Single conductor transistor output PFH-d: 1.78 x 10
-9
Double conductor transistor output PFH-d: 0.776 x 10
-9
-
Double conductor output PFH-d: 3.87 x 10
-9
: 1260 operations/year at max switched current
2A
-
Double conductor output PFH-d: 3.87 x 10
-9
: 3780 operations/year at max switched current
0.5A
-
Double conductor output PFH-d: 1.09 x 10
-9
: 100 800 operations/year at max switched current
0.2A
Formula to count the PFH-d value for each safety channel:
- Single Safety Simplifier: PFH-d = Input + logic + output
Multiple Safety Simplifiers with radio communication with repeating information:
- PFH-d = Input + n x logic + output (n = numbers of Safety Simplifiers in the system)
Multiple Safety Simplifiers with radio communication without repeating information:
- PFH-d = Input + 2 x logic + output
Multiple Safety Simplifiers using CAN-bus for safety communication:
- PFH-d = Input + 2 x logic + output
Multiple safety Simplifiers connected to each other via inputs and outputs
- PFH-d = (Input + logic + output) x m (m = numbers of units from input to output)
Life time used in above calculations based on EN61508: 10 years
Life time according to table in EN13849-1 for PFH-d: 20 years
