Westermo ODW-622, Руководство пользователя

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12 6650-2233
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 pos-
sible. When the link returns to operations mode, the alarm will reset automatically.
RS-232 interface
A 9-position female D-sub connector that handles full duplex data rates up to 250 kbit/s.
With transparent mode the RS-232 interface can handle an arbitrary data rate up to
250 kbit/s without any data rate or data bit settings. With RTS/CTS control selected, the
request to send RTS signals will be transferred between the ODW-622s over the fibre
optic network. These RTS signals are transferred independently of the data transfer.
An RTS signal received at the end unit will set the clear to send CTS signal.
The data carrier detect DCD signal is set as long as the fibre link is in operation, ready
to transfer data. The data set ready DSR signal is set as long as the ODW-622 is in
service. If RTS/CTS is set to OFF will CTS always be set to active.
Redundant power supply, galvanic isolated (2 kVAC) to other ports
ODW-622 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-622 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.