GARD – Installation, Operation and Maintenance Manual
A l e n c o n S y s t e m s L L C - P a g e
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7.2 Communication Ports
With the help of two weather proof RJ-45 connectors, a number of GARDs may be daisy chained
and connected to SCADA controller or to the ACE (Alencon Communication Environment
network). Through the same RJ45 connector all the GARDs in the network are wired to a global
E-STOP that can remotely disable the GARD i.e. disconnect/isolate PV strings from the Output.
Figure 12: GARD Bottom view
The GARD offers a remote disconnect feature i.e. Remote-E-Stop that can be used in emergency
situations. We can turn_OFF the relay operation and disconnect the PV strings remotely if
required. The GARD uses the same RJ45 communication channel to do this. Below picture
explains how this works –
