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Installation manual
HB-37420-810-01-25F-EN SMX100 Installation manual.docx
Page 120 of 260
Version: 25F
4.3.5.3 Overview of achievable PI for digital safety outputs
Output SMX
Actuator /
external shut-
down circuit
Categor
y acc. to
EN13849
-1
DC
MTTF
D
Actuat
or
Achieva
ble PI
acc. to
EN ISO
13849-1
Boundary
conditions
Fault
exclusion
Single-channel
without
dynamic
output test
Qx
Q1_PP,
Q2_PN,
Q3_PP,
Q4_PN
IQQx
Single-channel
Contactor, valve,
brake, etc.
without direct
feedback for
diagnostics.
Cat. B
0 %
Medium
B
Contactor and
downstream
actuators
appropriately
designed for safety
application
Single-channel
Contactor, valve,
brake, etc. with
monitored and
positively guided
auxiliary contact
Cat. 2
60-
90%
Depending
on switching
frequency
Medium
B
Auxiliary output
required for warning
in case of detected
malfunction
Contactor and
downstream
actuators
appropriately
designed for safety
application
High
C
As before
D
As before DC = 90
% due to a
sufficiently high test
rate with reference
to the application
Single-channel
without
dynamic
output test
Q1 or 2
or
Single-channel
Q1_PP,
Q2_PN,
Q3_PP,
Q4_PN
Dual channel
Contactor, valve,
brake, etc. with
direct feedback
for diagnostics
at least in one
channel or
actuator single-
channel
controlled with
safety function
cat. 3 (e.g. STO)
Cat. 2
90%
Monitoring
only in an
external
shut-down
circuit
Medium
c
Auxiliary output
required for warning
in case of detected
malfunction
Contactor and
downstream
actuators
appropriately
designed for safety
application
Short circuit
on external
control
High
d
Single-channel
without
dynamic
output test
IQQ01..IQQ40
Dual channel
Contactor, valve,
brake, etc. with
direct feedback
for diagnostics
at least in one
channel or
actuator single-
channel
controlled with
safety function
cat. 3 (e.g. STO)
Cat. 3
90
%
Monitoring
only in an
external
shut-down
circuit
Medium
or High
d
Contactor and
downstream
actuators
appropriately
designed for safety
application
Short circuit
on external
control
Einkanalig mit
dynamischen
Ausgangstest
IQQ01..IQQ40
Dual channel
Contactor, valve,
brake, etc. with
direct feedback
for diagnostics
at least in one
channel or
actuator with
safety function
cat. 4 (e.g. STO)
Cat. 4
99%
Monitoring
in both
external
shut-down
circuits
High
e
Contactor and
downstream
actuators
appropriately
designed for safety
application
Monitoring of
electro-mechanical
components by
means of positively
guided switches,
position monitoring
of control valves,
etc.