I/o connection, Shdsl – Westermo DDW-142-EX User Manual
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I/O connection
1
2
3
4
4-position
Product marking
Direction
Description
No. 1
Status +
Output
Alarm relay (status) contact
No. 2
Status –
Output
Alarm relay (status) contact
No. 3
Digital in +
Input
Digital in +
No. 4
Digital in –
Input
Digital in –
The Status output is a potential free, opto-isolated normally closed solid-state relay.
This can be configured to monitor various alarm events within the unit, see WeOS Management Guide.
An external load in series with an external voltage source is required for proper functionality.
For voltage/current ratings, see Interface Specification section.
The Digital in is an opto-isolated
digital input which can be used
to monitor external events.
For voltage/current ratings, see
Interface Specification section:
DDW-142
External
Load
Status
V
V
Digital In
+
1
2
3
4
–
SHDSL
1
2
Position
Direction*
Description
No.1
In/Out
2-wire Receive/Transmit SHDSL
No. 2
In/Out
2-wire Receive/Transmit SHDSL
* Direction relative this unit.