Studer Innotec SA
Xcom-485i
10
User manual
5.5
C
ONNECTION OF THE COMMUNICATION BUS
(S
TUDER SIDE
)
The Studer bus is daisy chained to the other XT/VT/VS Studer components and is powered by the
communication plug as soon as the upfront device is powered. The Xcom-485i module should not
be installed between 2 devices powered by the battery. Connect the Xcom-485i module with the
supplied cable (2m). This cable should not be extended.
5.6
C
ONNECTION OF THIRD
-
PARTY DEVICES
In most cases, a specific cable must be crafted by the installer according to chapter 5.3 . This cable
will have on one side the appropriate connector recommended by the third-party device (SCADA,
PLC, etc.) and on the other side an RJ-45 connector.
Do not connect the Xcom-485i between devices connected to the battery. Do not
connect the module to a device not connected to the battery (RCC or other Xcom).
The termination switch of the communication bus "Com. Bus" remains in position T
(terminated) except when both connectors are used. In this case and only in this case,
the switch must be placed in the O (open) position. If one of the two connectors is not
used, the termination switch will be in position T.
An incorrect setting of the link ends can lead to an erratic running of the system or impede
its updating process.
By default, the termination is set to terminated (position T) on each Studer product.
Figure 2: Connection schematic for Xcom-485i
