Technical data

www.westermo.com Theoretical and general applications 21
Installation conditions
Installation Inst. Cat Cable type Port Comments
Power supply II Power
Power supply (HV) II Power
TNV-3
(<70.7 Vp 120 VDC) I Unshielded Signal balanced PSTN or similar
TNV-1
(<42.4 Vp 60 VDC) I Twisted pair, Signal balanced RS-422/485,
unshielded Ethernet or similar
SELV
(<42.4 Vp 60 VDC) I Unshielded Signal RS-232 or similar
Requirement
Factor Severity Standard Comments Reference
Electrical safety Information technology EN 60 950 See 1.6
equipment
Service life 10 years
Supply connection Permanently connected
Accessibility Restricted access location Access, by
service personnel
and by tool
Maintenance No
Isolation
Circuit To Circuit(s) Electric strength
Supply All other ≥1kVAC
Supply HV All other 3 kVAC See 2.3
SELV TNV-1, TNV-3 1 kVAC
TNV-1 TNV-3 1 kVAC
TNV-1 TNV-1 1 kVAC See 2.4
TNV-3 TNV-3 1 kVAC See 2.5
Safety conditions
B A C K