Westermo ODW-631 - Manual (Page 12)

12 6650-2243
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 link. The alarm will be set until the fibre optic link is in
operation and ready to transfer serial data. Data can be transferred over the fibre optic
link as long as the link is in operation.
When the fibre optic link is out of operation this will be indicated by a local alarm out-
put. When the link returns to operation, the alarm will reset automatically.
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
The ODW-631 should be supplied with safety extra low voltage (SELV). It is designed to
operate permanently over a wide DC or AC voltage input range and provided with two
independent inputs for enhanced redundancy if either supply fails.
Single- or multimode LC fibre connectors
The ODW-631 uses Small Form Factor Pluggable (SFP) transceivers that are in compli-
ance with Multi-Sourcing Agreement (MSA). 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.
Designed for harsh environments, such as industrial, road and railway
applications
The ODW-631 complies with standards for industrial environments, railway signalling and
telecommunications apparatus. Additionally the wide temperature range permits it to be
installed in out-door cabinets without any additional measures, such as heating, etc.