Oxygen Technical Manual
Mounting Variations –
The BUS can be mounted in any architecture(closed loop, tree, star) as long as the distance and section
requirements are respected.
BUS cable –
It is recommended to use the QBUS cable or any other cable with minimum 2 x 1mm
2
conductors as a BUS
lead.
BUS Lengths –
The BUS can be installed up to a length of 200 metres. The maximum distance between the OXJC and the
module that is farthest away from the OXJC may be 200 metres.
We strongly recommend to run the BUS in a loop and join it at the controller. In this case (with a sealed loop)
we can increase the total length to 400 metres. The BUS connection will continue working, even when the
circuit is interrupted, the it would work as a star.
Features of the BUS –
The BUS consists of 2 conductors (minimum 2 x 1mm
2
)
The BUS has no polarity
The response time for 1 output is 20 msecs and 0.1 secs for 388 outputs.
The BUS operates in 2 directions (bi-directional) and each module can send and receive.
The BUS allows for simultaneous communication (programming and operations can be carried out
at the same time)
There are no BUS conflicts or waiting times when several operations are carried out simultaneously.
The BUS supplies power to and controls all modules via the controller.
