Westermo DDW-142-485 - Manual (Page 14)

14 6642-22511
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-142-485
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.
RS-422/485
4
3
2
1
Position
Signal
Direction Description
Product
marking
RS-422
(4-wire)
RS-485
(2-wire)
No. 1 R+ – In RS-422: Receive R+
No. 2 R– – In RS-422: Receive R–
No. 3 T+ T+/R+ Out/In RS-422: Transmit
RS-485: Transmit/Receive
T+
No. 4 T– T–/R– Out/In RS-422: Transmit
RS-485: Transmit/Receive
T–