System Bus - JUMO mTRON T System Description

6.5

System bus

Side system bus
The side system bus connects the base unit or router module to the input/output modules ar-
ranged on the same DIN rail.
Either
• a base unit or
• a router module
must always be installed on the left, at the start of the DIN rail. The distinguishing feature is that
their plug-in connections are only to the right; all other modules have plug-in connections on
both sides.
The system bus on the side is physically implemented as a point-to-point connection. The con-
nection is only ever made between two neighboring modules. If a module or a module insert
does not function or is removed, the modules to the right can no longer be reached.
NOTE!
The further to the left a module is installed, the greater the probability that the module can still
be reached in the event that a different module fails.
System bus connections of a base unit, using the example of a central processing unit
3 Side system bus Out
7 System bus Out
The router module has an identical connection for the side system bus, but a total of three RJ45
sockets for connecting to the base unit (Bus In), the multifunction panel, or additional router
modules (Bus In, Bus Out1, Bus Out2).
Com1
ON
1 2 3 4
ON
3
1 2 4
Com2
6 Electrical connection
Power
Status
Bus Error
Com1
Com2
Setup
Run
Stop
Reset
LAN Bus Out
3
7
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