Eaton ARCON 2.0 Series, Operation And Configuration Instructions. Technical Description

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9.2.5. Multiple master connection via BI/O bus interface
In applications with multiple master units the master units can be interconnected via BI/O
(binary input) bus interface. In this case, each part of the system can control four protection
zones per its own system communication bus. Both, arc and overcurrent information is trans-
ferred between the master units but without address information.
The following BI/O connections are included in the standard scope of delivery:
La> in X3-8 Arc input, tripping group 1
Lb> in X3-9 Arc input, tripping group 2
I> in/out X3-10 Overcurrent input/output
La> out X3-11 Arc output, tripping group 1
Lb> out X3-12 Arc output, tripping group 2
GND X3-13, X3-14 Grounding for all BI/O signals
To obtain transfer of arc information between master units:
• Connect the systems using the BI/O terminals X3-8, 9, 11 or 12 (+).
• Connect both terminals X3-13 (GND).
To obtain transfer of overcurrent information between master units:
• Connect the systems using the BI/O terminals X3-10 (+).
• Connect both terminals X3-14 (GND).
NOTE! Note the polarity of the cables.
NOTE! The system‘s I/O units should be connected to the respective master unit in the same zone.
The fi gure below shows an example connection where arc and current information is transfer-
red in both directions between master units.
X3 X3
La>in
BI/O
La>out
GND
GND
I /out >in I /out >in
{
Master unit 1 Master unit 2