Metronix 9200-4104-2000, Mounting Instructions

Page: 66 / 95

6 Technical data
6.4 24 V supply and STO [X3]
24 V supply
Characteristic Value
24 V supply 24 VDC [± 20 %] (0.2 A)
*1)
*1)
plus the current consumption of the I/O's and a possibly existing holding brake.
Characteristic values
Characteristic Value
Safety level Category 4 and performance level
e or SIL3/SIL CL3.
PFH (probability of dangerous failure per hour) 3 x 10
–11
PFD (probability of dangerous failure on demand) 5 x 10
-6
DCavg (average diagnostic coverage) High
MTTFd (mean time to dangerous failure) Limited to 100 years (cat. 3)
Limited to 2,500 years (cat. 4)
See also section 9.2 CE conformity (Machinery Directive) on page 90.
Proof-testing of the STO function
Comply with the following test intervals in order to reach the specified values:
l
For SIL 2, PL d/category 3: 1x per year
l
For SIL 3, PL e/category 3: every 3 months
l
For SIL 3, PL e/category 4: daily
6.4.1 Electrical data of the STO function
Control inputs STOA/STOB [X3]
Characteristic Value
Nominal voltage 24 V (referred to GNDA/GNDB)
Voltage range 19.2 V… 28.8 V
Permissible ripple 2 % (referred to a nominal voltage of 24 V)
Nominal current 12 mA typ., 30 mA max.
Switch-on input voltage threshold >= 16 V
Switch-off input voltage threshold < 5 V
For the technical data of the digital inputs DIN6 and DIN7, see the section 6.10 I/O
Interface [X1] on page 80.
Mounting Instructions BL 4000-M and BL 4000-D Page 66 of 95