Installation manual
Page 38 of204
4.2.1.5 Overview of achievable PI for digital safety inputs
Type of
sensor /
input
element
InPort
Parameterized /
operational tests
Achievable
PI acc. to
EN 13849-1
Fault exclusion
for input
element
Condition for input
element
Cros
s
-s
h
o
rt
in
g
te
s
t
Wi
th
t
im
e
-out
Sta
rt
te
s
t
Cy
c
lic
t
e
s
t
d
u
ri
n
g
o
p
e
ra
ti
o
n
Single-
channel
DI1..D14
b
Operation proven input
element
O
O
d
All faults at the
input element
Short-circuit at
input/signal line
MTTF
D
= high
Connection in control cabinet
or protected routing
DI1..D4
DI9..DI12
e
All faults at the
input element
Short-circuit at
input/signal line
Input element does not comply
with min. PIr
Connection in control cabinet
or protected routing
All
X
d
Getting caught
Short-circuit at
input/signal line
Mainly High level required
(T
High
> 100 * T
Low
). Positively
disconnecting
MTTF
D
= high
Connection in control cabinet
or protected routing
X
O
O
e
All faults at the
input element
Short-circuit at
input/signal line
Input element does not comply
with min. PIr
Connection in control cabinet
or protected routing
MTTF
D
= high
Dual-
channel
parallel
All
d
Short-circuit
between
input/signal line
Connection in control cabinet
or protected routing
MTTF
D
= medium
X
e
MTTF
D
= high
Dual-
channel
parallel
All
X
e
Short-circuit
between
input/signal line
(only with common
switching elements
= 2xNO or 2xNC)
Connection in control cabinet
or protected routing
MTTFD = high
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