ABB Sentry USR22 Product Manual page 44

Standard
IEC 61508
EN ISO 13849-1, EN 62061
Mission time
Information for use in USA/Canada
Intended use
Power source
44
PFH 3.9E-9 and PFD 7.3E-5 (see chapter 8.2
D
Scheduled test)
PFH 3.9E-9
D
20 years
Applications according to NFPA 79
A suitable isolating source in conjunction with
a fuse in accordance with UL248. The fuse
shall be any (JDYX/7) fast acting, ratings 250V,
4 A, IR200A, and be installed in the +24 VDC
and 230VAC power supply to the device in
order to limit the available current.
2TLC010073M0201 Rev.G