Parker PSD1-SW1200 - Technical Data for STO

Safe Torque Off (STO) with PSD1
80 (109) 192-011006N8 2019-07 09.10.19 09:27
6.8 Technical data STO
Category
Specifications
STO
Certificate
(http://www.Parker.com/
Literature/Electromecha
nical
Europe/Certificates/DOC-
0014-01_PSD_STO_Certif
icate.pdf)
According to EN ISO13849
Device certified if “STO certified” is stated in type plate
(below the CE sign)
Nominal voltage of the
inputs
24 VDC
Required isolation of
the 24V control voltage
Grounded protective extra low voltage, PELV
Fuse protection
Protection of the STO control voltage: 1 A
Number of inputs
Signal inputs via
optocoupler
2
Low = 0 ... 5 V DC or open
High = 15 ... 26.4 VDC
I
in
at 24 VDC: 9 mA +/-1 mA
STO Input A, Level
Low or open = STO activated
High = STO deactivated
Reaction time max. 5 ms
STO Input B, Level
Low or open = STO activated
High = STO deactivated
Reaction time max. 5 ms
Switch-off time
Switch-off time with unequal input statuses: 10 s (max. error response time)
During the inequality, it is ensured within 5 ms that the motor torque is switched off
single-channel.
Maximum tolerable test
pulse time
Maximum tolerable test pulse time (low active) for external safety control:
1 ms
Grouping of safety level
• Category 3
• PL=e
• SIL 3
• PFHd=1.00E-9 per STO circuit
• Mission time: 20 years
• MTTFd = 800 years (when using EN ISO 13849-1 the MTTFd value must be limited to 100
years)