Westermo ODW-720-F1 - Manual (Page 17)

17 6651-2221
About the interfaces
Power
The power terminal has two independent inputs, +VA and +VB, allowing redundant
power input.
The ODW-720-F1 power supply is galvanically isolated from all other interfaces.
Optical fibre interfaces
ODW-720-F1 uses Small Form Factor Pluggable (SFP) transceivers. This means that a
wide range of different fibre transceivers and connectors can be used (see page 12–13).
RS-232 interface
The RS-232 interface is a female 9-position D-sub. Pin assignments are compliance with
the EIA RS-232 standard.
Status port
The status port connects to an internal relay witch may be used to trigger an external
alarm if a fault condition occurs. During normal operation pins 1 and 2 are in contact
with each other, and pins 2 and 3 are isolated. During an optical link failure, or power
failure, pins 1 and 2 are isolated, and pins 2 and 3 are in contact with each other.