schmersal PSC1-C-10 Series, Installation Manual

Page: 82 / 173

Installation manual
PSC1-C-10 Installation manual V2.6 Page 82 of 173
Version: 57E
4.3.5.3 Overview of achievable PL for digital safety outputs
Output PSC1 Actuator /
external
shutdown
circuit
Category
according
to EN ISO
13849-1
DC MTTF
d
actuato
r
Achiev
able PL
accordi
ng to
EN ISO
13849-
1
Boundary condition Fault
exclusion
Single-channel
without
dynamic
output test
Q4 or Q5
Q0_P, Q1_N,
Q2_P, Q3_N
IQQx Single-channel
Contactor, valve,
brake etc. without
direct feedback
for diagnostics Cat. B 0 % Medium B Contactor and downstream
actuators suitably designed
for safety application
Single-channel
Contactor, valve,
brake etc. with
monitored,
positively driven
auxiliary contact
Cat. 2 60-
90%
Dependen
t on
switching
frequency Medium B Signal output required for
warning if malfunction
detected
Contactor and downstream
actuators suitably designed
for safety application
High C As before
d As before
DC = 90% due to
adequately high test rate in
relation to the application
Single-channel
without
dynamic
output test
Q4 or Q5
or
Single-channel
Q0_P, Q1_N,
Q2_P, Q3_N
Dual-channel
Contactor, valve,
brake etc. with
direct feedback
for diagnostics in
at least one
channel
or
Actuator
operated with
single channel
with safety
function cat. 3
(e.g. STO) Cat. 2 90% Monitorin
g only in
one
external
shutdown
circuit Medium c Signal output required for
warning if malfunction
detected
Contactor and downstream
actuators suitably designed
for safety application Short-circuit
on external
operation
High d
Single-channel
without
dynamic
output test
IQQ00
..IQQ09 Dual-channel
Contactor, valve,
brake etc. with
direct feedback
for diagnostics in
at least one
channel
or
Actuator
operated with
single channel
with safety
function cat. 3
(e.g. STO) Cat. 3 90
%
Monitorin
g only in
one
external
shutdown
circuit Medium
or high
d Contactor and downstream
actuators suitably designed
for safety application Short-circuit
on external
operation
Single-channel
with dynamic
output test
IQQ00
..IQQ09 Dual-channel
Contactor, valve,
brake etc. with
direct feedback
for diagnostics in
both channels
or
Actuator with
safety function
cat. 4 (e.g. STO) Cat. 4 99% Monitorin
g in both
external
shutdown
circuits High e Contactor and downstream
actuators suitably designed
for safety application
Monitoring
electromechanical
components by means of
positively driven switches,
position monitoring on
switching valves etc.