ABB SROUT Technical Reference Manual page 13

1MRS 750109-MUM
ABB Automation
Router Option Card for Lon® Star Coupler
RER 111
The figure below shows the required jumper settings of jumper groups S1, S2, S3
and S4 for each transceiver mode and the corresponding transceiver ID.
Router side A can be set to be a TP/XF-78 interface, i.e. 78 kb/s speed, a TP/XF-
1250 interface, i.e. 1.25 Mb/s speed, or a fibre-optic interface
.
TP/XF-78 TP/XF-1250
S1 S1
S2
S2
S3
S3
S4 S4
)LJ  -XPSHU JURXSV 6 6 6 DQG 6 XVHG IRU VHOHFWLQJ WKH WUDQVFHLYHU
IRU URXWHU VLGH $
The jumper group S1 is used for selecting the transceiver type to be used (jumpers
J2 and J3) and to control the network termination. The following figure shows how
to enable and disable network termination using jumpers J1 and J4.
Network termination disabled
S1
J1
J2
J3
J4
)LJ  -XPSHU JURXS 6 VKRZLQJ WKH VHOHFWLRQ RI WKH 73;)
WUDQVFHLYHU ZLWK QHWZRUN WHUPLQDWLRQ GLVDEOHG DQG HQDEOHG
Jumper group S4 is used to connect the fibre-optic interface to router side B, i.e. the
open collector bus. Note that the fibre-optic interface can be connected to router side
B only when it is not connected to router side A, i.e. when a twisted pair interface is
in use.
Fibre optic
S1
S2
S3
S4
srout_9
Network termination enabled
S1
J1
J2
J3
J4
SROUT
srout_10
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