Arcnet Expansion Ports; Rs232/Rs485 Communication Ports; Signals - DAQ IoG User Manual

Callisto IoG
D A Q E L E C T R O N I C S

2.5 Arcnet Expansion Ports

The Arcnet expansion ports constitute two RJ-11 jacks, and are located on the right side
of the front panel, directly to the left of the input power header. These jacks are
physically and electrically identical, and allow quick and simple interfacing between
other IoG modules, or any other Callisto series RTU.
The Arcnet cable provided with the IoG module allows simple interconnection from IoG
to IoG. To tie together two modules plug one end of the Arcnet cable into either one of
the two RJ-11 jacks on one IoG, then plug the other end of the cable into either RJ-11
jack on the second IoG.
To add in more units, just plug one end of an additional Arcnet cable into the unused RJ-
11 jack of one of the existing IoG's, and the other end into either RJ-11 jack of the new
IoG(s).
Expanding to other Callisto series RTU's is just as easy, but it will be necessary to use
the correct type of Arcnet cable. Contact the factory for details.
Please note that Arcnet expansion, as described above, does require that each node have
a unique Arcnet address. The procedure for setting the Arcnet address in the IoG module
is described in Section 3.5.1.
Additionally, proper termination of the Arcnet bus is also necessary. This is easily
accomplished, the procedure for which is described in Section 3.3.

2.6 RS232/RS485 Communication Ports

2.6.1 Signals

The IoG module provides four RJ-45 jacks for communication between the IoG module
and connected IED's and Master Stations.
WHEN THE MODULE IS SITTING WITH THE HEARTBEAT AND POWER AT
THE TOP, PORT 1 IS THE BOTTOM RJ-45, AND PORTS 2-4 GO UPWARDS
FROM THE BOTTOM.
Each port provides RS-232 and RS-485 signals simultaneously, therefore setting up the
port for either RS-232 or RS-485 communication merely involves selecting the
appropriate signals from the RJ-45 jack. This is easily accomplished with proper cabling.
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