Toa SX-2000 Series Installation - Manual (Page 129)

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4.5. SX Link Terminal Connections
connect the SX link terminals of all SX-2000Sm, SX-2000AI, SX-2100AI, SX-2000Ao, and SX-2100Ao units
within the system to each other via switching hubs. connect each of SX link terminals A and B to the same
switching hub or different switching hubs connected in star configuration.
Notes
• Make the SX Link terminals completely independent from other LAN.
• The distance between each of SX-2000SM, SX-2000AI, SX-2100AI, SX-2000AO, or SX-2100AO and a
switching hub, and between switching hubs is less than 100 m.
• Be sure to make connections of both terminals A and B.
• When using multiple switching hubs, make a star connection from the switching hub to which the SX-2000SM
is connected as shown in the example 2.
SX-2000SM
SX-2000AO (1)
SW-HUB
SW-HUB
SX-2000AO (2)
SW-HUB
SX-2100AI
SW-HUB
SX link A, B
SX link A, B
SW-HUB
SW-HUB
SX-2100AI
SX-2000AO
SW-HUB SW-HUB
SX-2000SM
SW-HUB
SW-HUB SW-HUB SW-HUB
SX link B
SX link B
SX link A
SX link A
(Operating)
SX link B
(Operating)
SX link A
[Connection example 2: Non-redundant configuration of switching hubs]
[Connection example 1: Redundant configuration of switching hubs]
* A method of connecting a single unit's SX link A and B terminals to each different switching hub to prevent
the system from going down when a cable is broken or power fails.