Pilz PSEN sg2c-3 Series, Operating Manual, Page: 25 / 79

Wiring
Operating Manual PSEN sg2c
1003267­EN­02
25
5.10 Single connection
INFORMATION
When the solenoid is operated in single­channel, only a safety level of PL d
(Cat. 2)/SIL CL 2 can be achieved.
To achieve PL e (Cat. 4/SIL CL 3, the solenoid must have dual­channel op­
eration, e. g. via safe pulsed semiconductor outputs with high current load
capacity (0.9 A for 50 ms).
X2-4
24 V 0 V
I1 (ST) I3 (FS)
A1
A2
PSENsgate
O1 (FS)
Auswertegerät/
Evaluation device/
Appareil de surveillance/
Dispositivo di controllo
FS: Fail-safe
ST: Standard
I4 (FS)
X2-3
X1-3 X1-4
X1-1
X1-2
X1-6 X1-5
I2 (ST)
X1-9
O3 (ST)
X1-8
O2 (FS)
X1-7
5.11 Series connection
CAUTION!
Extension of delay­on de­energisation
When several (n) devices are connected in series, the delay­on de­ener­
gisation time adds with the number of interconnected safety switches.
The may. delay­on de­energisation is composed of
max. delay­on de­energisation actuator
+ (n­1) x max. delay­on de­energisation of the inputs
+ delay­on de­energisation of the evaluation device