Westermo ODW-630-F2 - Manual (Page 11)

11 6651-22651
Optical fibre link functionality and status indication
At power on, all LED’s will be active during an initiation sequence followed by an auto-
matic initiation of the optical fibre links. The alarm will be set until the fibre optical links
are in operation and ready to transfer serial data.
Data frames are transferred over the fibre optic links as long as the links are in operation
and the data rate has been detected.
When any of the fibre optic links is out of operation, this will be indicated by a local
alarm, and this will set the alarm output. It will also send a remote alarm via the other
link, if possible. When the link returns to operations mode, the alarm will reset automati-
cally.
RS-485 interface
A 4 position detachable screw terminal that can handle full duplex data rates up to
1.5 Mbit/s and can be set to either 2- or 4-wire RS-485 system.
When 4-wire RS-485 is selected, the terminals T/R+ and T/R– will always be set to
transmit and terminals R+ and R– will always receive data.
Manchester coded protocol can be transferred with Synchronous mode.
Redundant power supply, galvanic isolated (2 kVAC) to other ports
ODW-630-F2 should be supplied with safety extra low voltage (SELV). It is designed to
operate permanently over a wide input range and provided with two independent inputs,
allowing redundancy should either supply fail.
Single- or multimode LC fibre connectors
ODW-630-F2 use Small Form Factor Pluggable (SFP) transceivers that are in compliance
with the Multi-Sourcing Agreement (MSA). This means that a wide range of different fibre
transceivers and connectors can be used.
Status interface
This port enables supervision of fibre optic link status by a relay with both normally open
and closed contacts.
The status will be set if:
• Local or remote of fibre link errors exist.
• The unit is out of service, e.g. no power supply.